VDD -> Arduino +5v PZEM-004T New Version TTL Modbus Power Energy Watt Meter AC 220V 0-10A Electricity Volt Amp Wattmeter Kwh Voltmeter For Arduino. The first number displayed is the instantaneous current followed by the instantaneous power. Great article, very informative and well thought out. This second calibration must be done only after the first calibration take into effect. When battery is fully charged (6.5v) we will get a Vout=3.25v and lower value for other lower battery voltage. Any kind of CT you can use if you can calibrate in the code. void setup() 08:58:10.367 -> RMSPower : 100, 08:58:26.658 -> analog input : 410 Hi Michael The millis() function returns the no of milliseconds since the Arduino board began running the current program. Prepaid Electricity Energy Meter is a good concept in which you can recharge its balance, like we do in our mobile phones. When the available electricity consumption is left 30 percent, the Arduino Mega raises the D0 bit of the RF decoder high sending an acknowledgement of low . In this tutorial, I will show you how to make a Wemos ( ESP8266 ) based Multifunction Energy Meter. The solar panels are monitored and recorded by a device called Solarlog 500. Across the two wires going to the signal generator in the Autodesk Circuits schematic. I used burden resistor as 100 ohm resistor This means that with a 100A CT, you have an effective range of about 100 x 120 = 12,000W. kindly help me in this regards, Ill be very thankful to you Thanks friend for you taken you time and share your ideas and knowledge ,its great your project! D0 -> Arduino Not Connected Turn off everything in house and power arduino by battery? Adafruit have a good library for driving these displays. So I doubt Ill exceed 75A maximum its the minimum Im wondering about. Please help,,!! datastreams[0].setFloat(sensor1); // power value but current is calculated but the kwh finding not working Can I use this to remotely read my power/energy usage at home using my smartphone? It looks like your energy meter is working reasonably well. Youll then need to add an if statement to the code just after the kilowatt hours are calculated which turns the relay off if the power consumed exceeds 10kWh. At the box the breakers alternate legs as they go down meaning that not all 110 devices run on the same leg. Unit of Energy is Watt Hour or Kilowatt Hour (kWh) 7.59A, 834W Thank you for your article. The only easy way to calibrate it is to take readings from the screen for a few known loads (it appears that you have done this) and then calculate the calibration factor using a linear best fit. Veaudry straightener (peak 1.58A) (both fluke and killawatt same A rating). Thanks for the reply. I am using a Talema ACX-1050 50A 2500:1, with the mentioned 130 ohm resistor together with 2 by 100K ohm resistors and a 10uF 50V capacitor (the one i had available to me). We can easily use INA219 Current Sensor with Arduino to measure current, and power, and it can also sense shunt voltage. The current sensor can use split core transformer for measurement which does not require direct conductor contact between meter and the household electrical system. The electricity fee per unit is set to 2 rupees in this project. First you need to start by assembling the components onto the CT or onto your breadboard in order to create your current sensor which produces a signal which your Arduino can understand. If you are going to be installing your power meter somewhere permanently then you may want to solder the resistors and capacitor directly onto the CT so that they cannot come loose. You should quite easily be able to reduce the 2.94A to 0A with no load by adjusting the calibration factor. Secondly,i live in 220v region and it is different place to place for example if 210 v coming in my house, it not coming in my friends house it has 190v in his house .. thats why i need to calculate accurate voltages as well,so i want to know voltages of main without cutting the wire just like i calculate current with ct .. can u help me in this? Monitor your energy consumption through the Arduino IoT Cloud using a MKR WiFi 1010, a MKR 485 Shield and a Modbus compatible energy meter. Hello We need 2-timecalibrationforthe sensor and both calibration need to be done during no current measured. You dont need to do anything different for a 100W load, just choose the correct sized CT. For 100W, depending on your supply voltage (220V or 110V), you will need around a 1A or 2A CT. Hello Michael, Hi, All the readings show 0. Stay healthy and happy. and same for minCurrent = 0? This device is suitable only for DC loads such as Solar PV systems. 1. I have VAC 4658-X043 CT, I want to use it, can you help me with load resistance and other settings. During my childhood days continuing studies after dusk was a real challenge. . 10.69A, 1176W Using Arduino and some other components you can build your own energy meter that measure the supply current to your home through a CT (current transformer), current, power, maximum power and kilowatt hours consumed. Open an account withhttp://xively.com(formerly pachube.com and cosm.com), Sign up for a free developer account athttp://xively.com, then click the activation link to activate your account. Serial.println(); For data storing in a SD card you have to import the SD library, For tutorial clickhere To know more about the SD library clickhere. 2. Could you perhaps send a photograph or a sketch of the configuration? I havent done one with a variable voltage measurement. I sorry again im a novice for this kind of things. What is the purpose of the capacitor in the circuit? Thanks again! I have normal gG fuses, so they do not burn in seconds even with 100% load. What are you measuring with your CT? Ready for helping you with your questions, here is my CONTACT INFO: How I built an Arduino energy monitor and data logger to collect energy data for different loads and plotted that data using Excel. This is also useful for monitoring power interruptions and getting notifications when an interruption is experienced or restored. 2. via internet (Xively upload) How would ac & dc current flow without any problem? double RMSCurrent = ((maxCurrent 516)*0.707)/11.8337;, where those value came from? It seems that the meter is accurate on a specific scale and thats it, anything higher or lower goes out exponentially. lcd.print(voltage); As Steven has said, you could get one which plugs into an outlet and use that, provided you have an outlet near your distribution board. Step 9: Placing the Device. The data sheet of ACS 712 sensor is found here Peacefair has a lot of model to measure different current requirement from 20A up to 100A. Max current is the peak of the sampled values being measured in the time interval, 516 is the mid point of the sine wave (1023/2 with a slight offset), 0.707 is sqrt(2)/2, 11.8337 is the calibration factor detailed later in the post. Serial.println(); Specifications 1. 09:46:13.523 -> analog input : 571 . Firstly youll need to change your voltage in the code. 11.17A, 1228W When the pointer is directly on a number, look at the dial to the right. Energy monitoring by Connect the I2C Pins (SDA, SCL) of LCD Display to A5 & A4 pin of Arduino. Using the same code youve used above to display the raw input value in your code, youll now need to check that when you apply a load (current through) the CT, this value increases. Global variables use 97 bytes (4%) of dynamic memory, leaving 1951 bytes for local variables. The AC-1030 will also work but it is quite a bit bigger than you need for your supply. I have ohm the CT , 102 ohms. If youre planning on using this meter to consistently measure under 60W then you should use a different CT, the one youve selected is good for 11000W at 110V so youre using less than 1% of its scale, the resolution is therefore not that good for what youre trying to measure and this may also be causing your readings to fluctuate. const unsigned long connectionInterval = 15000; // delay between connecting to Cosm in milliseconds But my question now is this sound correct? Im using and adapting your project to build a PV monitor system. Finally you need two dividing resistors to get the 2.5V reference voltage from the Arduino. I have simulated this setup with 2 arduino's i wish you best, and God bless you beside people you love them! Prepaid Electricity Energy Meter is a good concept in which you can recharge its balance, like we do in our mobile phones. Arduino has the ability to measureAC current (via hall effect CT) by analog input pins. It can measureRMS Voltage. Counts KWh consumed by each load and for each Source. You should be using the outer two pins on your CT, you can leave the middle pin disconnected. The LCD screen is optional, it is obviously useful if you plan on permanently installing or using your energy meter however you can just make use of the Arduino serial interface to display the information. lcd.print(A); The current sensor that is widely used for Arduino is theACS712 Current Sensor Module. Can you tell me what I could do? So if you divide 12,000W into the range 512, you get a minimum resolution of 23W. int current = 0; You need to either use a bigger CT or measure lower current devices/appliances. Serial.println(datastreams[1].getFloat()); If you dont have LCD Display shield with you, kindly delete all the relevant code and you have to manually calibrate and key in the 2 offset values for the sensor. In the case of an electricity meter a pulse output corresponds to a certain amount of energy passing through the meter (Kwhr/Wh). WORKING PRINCIPLE : I can control contactor of heating resistors in boiler according to current. You can check: How to make a Single Phase AC voltmeter using PIC16F76 . 9. 09:45:53.161 -> RMSPower : 0 } When the power dies at your home and you turn on your inverter, what isolates the inverter circuit from the mains circuit so that you are not feeding power back into the grid and to your neighbours homes for example? We built our source code to handle up to 5 inputs measuring and 5 out measuring you just need to add more CTs and PTs for each additional input / outputs as we will discuss that in Hardware section. 09:49:14.568 -> RMS Current : 7.68 I have used the code which you posted without the LCD display. -> not OK for capacitive loads Circuits doesnt have a CT element so the signal generator was used in its place to generate a current sine wave. I cant figure out what the 2.05 is on line 43. But Rated current is 20A.. Hi all, 08:58:32.824 -> RMS Current : 8.78 Energy is product of power (watt) and time (Hour) Now, what is the best way to measure the power of, say, a vampire charger (a phone charger thats plugged in without the phone), or any other small appliances for that matter? Energy: Below we have attached the code that utilizes the button function that couldautomatically calibrateby itself when you pressed theSELECT Button. Sorry Im just really new to this as this is my first project. If you can make and program this meter then it really should be easy for your to add an extra item onto the display to show your monthly costing. Thank you. hi,sir thank you for your good project i need to build it but i need to add a relay to cutt off the power if i will consume a certain amount of power, example when i consum 10 W i need that i catt off the house power till i will start again the arduino, thanks plz help me. [emailprotected]. what maxCurrent = 1000 means? Check availability. This project can sense a sound level using mic, convert that sound into its corresponding dB, and then upload it to the cloud. Thanks for your comment. Its more accurate but I just havent had the time to change it in the code. For example, if youre drawing 200W, its going to take about 3 minutes for 0.01kWh to show up on the display. 08:58:04.317 -> MAX Current : 521 I belong to a village of Odisha, India where frequent power cut is very common. This meter currently only measures the current so you would need to add a small step down transformer to allow your Arduino to measure the voltage waveform. The value of 516 is the middle of the current waveform and hence 0 current. It should preferably be an electrolytic, 10V, 10F capacitor. In order to make sure that the monitor/switch can can run off the 12V battery power when the power is down I have added a small DC to DC power supply to the circuit. // taking 150 samples from voltage divider with a interval of 2sec and then average the samples data collected for(int i=0;i<150;i++) First of all great project here. What are your advise on this ? I dont need neither the RMS values nor the power values, but only the current ones. Step 3: Circuit Diagram. I suspect that your circuit isnt giving you a sine wave zero line at 516, therefore it is reading current even though nothing is connected. I love tinkering with electronics, making, fixing, and building - I'm always looking for new projects and exciting DIY ideas. and why is it when i remove the CT or turn off the load there is a continous reading in my Arduino ?? } if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'the_diy_life_com-box-4','ezslot_8',170,'0','0'])};__ez_fad_position('div-gpt-ad-the_diy_life_com-box-4-0'); Once you have connected all of your components, you need to connect your sensor onto what you want to monitor. Simply solder the three leads from your current sensor onto the pin headers on the shield and use A1 as your sensor input as shown below. It also can be used in AC Side of Solar PV System. Thats all correct but the load is probably too little to register. You only have to do this calibration once. the purpose of my project is definitely measure the main current and power but i just want to know that my ct is working on small loads and give me accurate readings (watts), or not before clipping on the mains thats why i use smaller load. Most of my works are related to Solar Energy and Arduino. Great Tutorial, char sensorId[] = POWER; This small device can be very useful for you in your day-to-day life. You have writing talent. where does this number 0.707 come from ? The values youve stated are well within this range, so the meter is likely working correctly for the hardware which it is connected to. #include<ArduinoJson.h> //This library is used to transfer data from arduino to nodemcu. He also used a slightly larger 420 character display. Its a bit simpler and has been tested by far more people. Support Terminal Commands: After connecting (MM-93) to your PC, you can ask it to send you any input/ output measurements through the Serial monitor. Thank you very much for this project and for reply. The problem is with your wiring of your CT and burden resistor or in how youve connected it to your load. void sendData() To know more about Hall Effect sensor click here something thats odd, the calculation of w=i*v (0.745X220=165) does not display 165w on either fluke or killawatt but rather 113W and I have no clue how they got that value. I cant seem to get it calibrated correctly. Hope this helps! Just to clarify, when you say measures 30A are you referring to the nominal value or maximum? We now also need to fit the full Sine wave into this range, so were only using half of this resolution. hi sir.. in this project i used ACS712 instead of CT and i havnt change any codes i till follow what input their .. and when i runned it the peak power and RMSpower are the same out put which is 6663W.. i use a 9v battery as well as an LED light.. to test it it apperas 6663w both the peakpower and RMSpower and 30.29A in RMScurrent and yet i runned it for almost 1 hr then their is no changes in kWh.. First off thanks alot for this! If that is the case then youll need to incorporate an AC voltage measurement module onto one of the Arduinos inputs. I havent used an Adafruite display before but you should be able to get it to work. Next you need to size your burdenresistorR3, this converts your CT current into a voltage reference. Below are two images of it in use, both with a low power input and a high power input. 10.75A, 1182W Does the back light come on? Thats not a major problem, it sometimes happens if there is an imbalance between the dividing resistors or wiring etc. It can measure Voltage, Current, Power, Energy, Capacity, and Energy cost is calculated from energy consumption and energy price per kWh. Thanks. Arduino-based SEM proposed by (6) , uses a GSM shield module on a microcontroller together with an LDR sensor and relay. Without the LCD Display, you can only monitor the measured current value on PC via Serial Monitor. According to the datasheet, there is a built-in 62ohm resistor. The Hall Effect is the production of a voltage difference (the Hall voltage) across an electrical conductor, transverse to an electric current in the conductor and a magnetic field perpendicular to the current. 15. Then I decided to monitor the voltage, current, power & energy involved in the system. Between cycling across the rolling fields, sailing along the steady water and strolli. The Amps match my clamp meter. 010V. Many thanks! The system allows users to get energy consumption updates via SMS, as well . so you know that it is connected correctly? what current sensor did u use ? 09:49:18.591 -> RMSPower : 1767 For single-phase domestic electricity meters (eg. It communicates with almost everything around the world. Youll need to adjust this value up or down until your meter displays the correct load. The code is also fairly similar. When I calibrate, the readings are good. Thanks again. } The problem I can see with what you are trying to achieve is not with the code but with the actual hardware and the operation of the CT. You wont have a problem triggering the relay to turn on the inverter when the monitor indicates no power. I have a question, I am using an Arduino Uno R3, and one SCT-013-000, could you perhaps explain the calibration for me i am in a 110vac area. The only problem is the the Ethernet Shield & this LCD shield share a common pin 10 and pin 4. Adjust it up or down depending on what is displayed until you get 300W. I had to add an extra line to the WHILE loop (if (maxCurrent > 517) break;) to break out of the loop. My aim is to minimize the loss of electricity there is when people forget to switch off their fans or lights, through smart home solution. Firstly id like to say Great write up I dont really understand how it works there. Reverse current will not damage the sensor but the voltage produced will be in reduced. Vbat=6.5 when fully charged The calculated power and energy by the Arduino/Wemos is displayed on a 0.96 OLED display module. Anyway, really my problem as the beginner for this project I need to understand deeply the circuit first! If youre only working with small household appliances then you probably only need a maximum of around 2000 watts so a 20A CT is fine for a 110V region or a 10A CT for a 220V region. Serial.println(ret); In order to do this accurately, you need to find a calibrated load. Unfortunately Im not that familiar with the ADS1115 but what youve said sounds correct and it looks like youd be able to use it. Check your connections again if you continue to get erratic readings. So do I have to change the calculation or will the scaling solve that? void getData() I averaged the values and I can see that there is ~20.275 uplift in wattage. Youre trying to measure two different appliances with current draws which are higher than your CT. You cant measure 7A and 8A on a 5A CT. Now for the display i have the IIC / I2C 1602 lcd and it needs the 5v on the arduino This setup only works for resistive loads. Hi Karthik, How did you size your burden resistors? The scaling figure in the line you are looking at is the 11.8337. Have you connected the capacitor and dividing resistors to your circuit? 010V again. Thanks again. Serial.print(Read energy ); I tried to measure current of my induction cooker then I get 7.35A on clamp meter and get very accurate result using your code as 7.25A Other question is I still cant understand clearly this line 512 is therefore the middle/zero line of the sine wave in an ideal environment, in my case 516 was the calibrated zero line. One is for Arduino and one for the nodemcu. There is a query regarding the experience. So the CT will actually detect that there is juice back in the supply lines. then the nodemcu receive the data and send it to blynk server with its unique authentication code and with blynk app we can see the data and graphically visualize The proposed system utilize Arduino UNO microcontroller. Hi Aadil, We use 220V for power hungry appliances and 110V for the smaller stuff. Your meter will then be ready to use. Hello Michael, The capacitor only sees around 2.5V so you can use a small 10V capacitor. } My main goal is to calculate kw used by my heat pump (Condenser, AHU and heat strips) and my hot water tank. You need to connect it to your mains supply and this is illegal in most countries if you are not qualified/certified to do so. Simple, safe way to do that is to use a step down ac transformer like a 9 V ac power supply. From what I can tell, there are two possible reasons you are getting fluctuating values: If no values are being displayed then its likely that the current transformer isnt connected to the correct Arduino pin or youre not measuring any significant current. Burden resistor = 39ohm. This needs a burden resistor of R=2.5/0.004=625ohms. Peacefair PZEM-051 Energy meter is an compact DC energy meter that measures Voltage, Current, Power and Energy. minCurrent = current; // In the app, Widget's reading frequency should be set to PUSH. how can in this project we enter AC current to arduino board ?? This is calculated as 165 x 0.707 = 116 W. It doesnt in this design as the standard Arduino doesnt have that much storage space. Can you tell me what does maxCurrent and minCurrent actually record? avgamps=totamps/time; // average amps Your article is very interesting but I face a problem : If you are getting all zeros then there is most likely something wrong with your circuit. Sir I am using ZMCT103C current sensor what should be my calibration scaling factor?I got 370 in ADC pin and from above method rms current is 22 A as fixed voltage 220 power is absurd 4840.. The first calibration is making sure it shows exactly at 0 point when no current is measured. pls can i use something else instead of the current transformer. If you live in the USA then the supply voltage is 110VAC, your CT can only measure up to 10A so (very simplistically) you cant measure any device which uses more than 11010=1100w. Im realizing a project in which I have to sample the current at a minimum of 600 Hz to reconstruct the synsoid. It is theHall-Effect Split-Core Sensor HSTS016Lmodule. // that you define how often to send data to Blynk App. Please inform the time taken for reading raw data. Hi Michael.. Thank you for the reply sir..please bare with since im new to this diy thing..correct me if im wrong..but from what i understand the voltage output of the ct will vary depending on the load the ct is connected to.. how can i measure the voltage if there is no load sir? #define API_KEY xxxxxxxx // Enter your Xively API key It can also disconnect the home power supply . I discovered, that if I plug 100W bulb, it cant read it, if I display RMSCurrent, maxCurrent and analog input I have this values: without any load: 7.41A, 814W To calculate the kilowatt hours, you multiply your amp reading by the supply voltage and then by the time period converted into hours, that will be watt hours and then divide by 1000 to get kilowatt hours. Que question is how can i measure direction of the power or the current.. Serial.print(Datastream is: ); 08:58:06.310 -> analog input : 498 Similarly, supply the Sound Sensor with a 3.3V supply through 3.3V Pin. I havent added costing to the code, its optional. If youre getting a number significantly less or more than 500, say 200 or 800 then your circuit isnt set up correctly. I have shown 9 Volt battery in bared board circuit is just for example to connect the wires.But the actual battery I used is a 6 Volt, 5.5Ah lead acid battery. I intend to monitor the power of a variety of household appliances, as well as the power coming into a house. It hampers the life of every one. Build a system to monitor and record home energy consumption. This is an ideal choice to measure the AC voltage using Arduino or ESP32. As youve said, its best to get the smallest possible CT for the largest load you expect to measure. The system automatically reads the energy meter Internet of Things (IoT) links anything from anywhere in the universe. 10.52A, 1156W The only other possibility is that the display draws too much power from the Arduinoss relatively small on board supply, this may be causing a sort of ripple on the supply which may be affecting the meters readings. Maximum is 32256 bytes. AEDUINO ADC convert Analog signal to corresponding digital approximation . The SCT-013-000 is listed in the Sizing The Burden Resistor section along with the required burden resistor size. what to do??:(. 08:58:30.774 -> RMS Current : 8.78 Wi-Fi Smart Energy Monitoring Control Meter. Do you have a way so confiscate for this or am I over thinking it. The Arduino has a resolution of 1023 increments on the analogue inputs so a CT which measures 100A will result in a resolution of 21.5 watts while one which measures 30A will result in a resolution of around 6.5 watts which is obviously much better for measuring smaller loads. I seem to be getting results however, when i look at the analog monitor i see that there are some values below 511. } I dont think that the problem is in the range or scale but in that youre trying to measure a load which has a power factor which is not close to unity, something this meter is not really designed for. Please note that TinkerCAD doesnt support a current transformer. This needs to be done with a load of around 2000-4000W for a 30A CT. Wonderful project. I was walking through the hardware store the other day and I walked past an energy meter which clips onto your homes electricity mains and then provides you with information on your power consumption and cost estimates for the month. { Im also not sure where you got the 100-ohm burden resistor size from? We have to add another offset to make it to zero value at the final stage for display. There are essentially four components which need to be chosen or correctly sized for you energy meter. I use the ADS1115 16bit ADC to read the output from ACS712 and process it in the code. // taking 150 samples from sensors with a interval of 2sec and then average the samples data collected This device has an S0 input port for the own power consumption monitoring and recording. 11.65A, 1281W I really like your work and the way you did it. Im looking to build one of these to measure power consumption of my PC. The output voltage of this sensor is2.5V +/- 0.625Vwith decent accuracy. Thank you for the great feedback. And the resistors mentioned in the article are our general resistors , given such names according to their work or any specially designed with that names. currently doing final year project on real time electricity billing system for household and i find that this article extremely useful especially for the comment section. Thats why I was interested in your meter. Record the numbers shown by writing down the value of the dial to . Put lines 25 to 36 of the original code into the loop to keep reading the current with a delay of say 1 second delay(1000) between checks. Since you are sensing a sin wave I would think that this introduces an error. E -> Arduino pin 6 for(int i=0;i<150;i++) Thank you for the feedback. 1. 11.05A, 1215W, As you see the values are jumping around quite a bit, so that is concerning me. Everyone can own a 3D printer and print what ever object based on what you can imagine !! Hello Mike, I am using a sct013 100A-50ma, capacitor of 10uF , resistor of 100Kohms, 58 Burden Resistor and I am using 120v, but the calibration without anithing send signal of 2.94A, I dont know what I am doing wrong, can you help me. If I tried to calibrate with 100W light bulb, I didnt get any number, if I put another 40W bulb and use another power meter I get 142W on it and on arduino I calibrate to get same power, but after I put vacuum cleaner, which has 900W with this 100W light I had on regular meter approx 1000W but on arduino calibrated to 140W I get more than 3000W. The scaling factor depends on a number of other factors, not just the sensor. You need an Ethernet shield which has a built in micro SD card reader, this can then be used for data logging. You are trying to measure 40-60W, which is 0.005 of the range. #arduino_energymeter, #diy_energymeter, #solar_energymeterFor details DIY instruction please see my instructable :http://www.instructables.com/id/ARDUINO-EN. I cant comment on whether thats correct for a 65W fan as I dont know what your CT rating is or in what configuration its been connected to your Arduino. The capacitor isnt a filter, rather its a low impedance path to ground for the AC signal. You should be using around a 2-5A CT. Ive followed the instructions. 450mah lipo (capacity is optional) with charging circuit. then I readjusted the meter to the Kettle, then retested the amaril wheel which was now incorrect, I went up and down and not getting anywhere. You can also see my other instructables on, 1. The Arduino Nano Every is based on the ATMega4809 microcontroller, which has a 10-bit (0 - 1023) Analogue to Digital Converter (ADC) for measuring voltages between 0V and 5V. To calculate how many amps yours needs to sense, take the maximum continuous power your are expecting to sense and divide that by your voltage (usually 110V or 220V depending on your country). Your project has helped me understand many things. If you do too, grab a cup of coffee and settle in, I'm happy to have you here. 08:58:06.310 -> RMSPower : 100 Journal of Information and Optimization Sciences. Now you can upload your sketch onto yourArduino, if you havent uploaded a sketch before then follow this guide on getting started. You can easily interface this module to any microcontroller like Arduino, STM32, PIC, AVR etc. sample2=sample2/150; However, I am not sure what to do with that value. Im not sure where you live but your voltage really shouldnt be fluctuating significantly enough to have an effect on the readings. I tried to calibrate using 100wt load and got the correct result but when i changed the load (200wt) didnt get correct output.Please Suggest me the proper way to calibrate this CT. North Holland. VO -> Arduino GND pin + Resistor or Potentiometer Please, help me with ideas how to build cheap, and reliable current protector (automatic control fuse). Your CT measures up to 100A which is quite a lot for a domestic load, you need to calibrate it with a load of around 8kW for a 110V supply or 16kW for a 220V supply. Thanks in advance.. No you wont need to constantly change it. I have a very strange issue with measuring current Calibrated everything but as current goes up it stays at max current reading even if load varies Kw/h keep counting up. Hi great job on the post The 516 and 517 are just the mid points of the sine wave. After facing lot of hardships the project was successful. Step 2: Components and Parts List. You would essentially need to build the same energy monitor but with a current sensor and relay driving a contactor on each device youd like to control. Yes I have written a tutorial for starting our with an LCD screen LCD Screen Connection to an Arduino. You should therefore be able to measure 2.5V at the Arduino input with no load if the divider circuit is working correctly. If it is just a simple transformer and not a high quality power supply it will also show you the variations in voltage level. To store the data youll need to use an SD card shield or provide a battery backed up power source so that the Arduino never loses power. This study presents a customized IoT-based Advanced Smart Energy Meter infrastructure with remote and local logging and monitoring of electrical parameters, and has provisions for connections to both web and cellular internet using ESP8266 and GSMsim800a. My programming problem was with the WHILE loop, as I wasnt sure how to get the information about the amount of current flowing in the main supply line to a subroutine/function that would evaluate that there is no power and activate the inverter switch relay. 09:49:16.553 -> RMSPower : 1767 Just connect the LED to the pin with a 220 ohm resistor and add a line of code to turn the pin on if the current is lower or higher than your range set points. Hi Joseph, good day, Michael! Now try running your meter with (for example) three 100W light bulbs connected and the display should read 300W. Greetings This is indeed a great article. It works now, We do several attempts and several trials in putting different appliances, and when I read some of the comments, I found out that, It only works In AC appliances. Also check that the contrast is adjustable and isnt set too far down. Hi Marcello, I tested it today again and seems alot better only thing now is the calibration could you perhaps explain the calibration for me i am in a 220vac area Thank you for the experience, it helped me lot . Perched on the banks of the Markermeer, this eco-friendly holiday resort is a sweet retreat in the great outdoors. Your analogue reference voltage to the Arduino is 2.5V so to determine the resistance you use R=V/I R=2.5/0.042=59.5. So you gonna multiply 1Kwh with the price per unity in your country. Just trying to figure this out and get it solved lol. I want to have some modifications with my energy meter. I wanted to ask how this energy meter is recording the total wattage kwh used over a week or a month. or both neutral and live have the same result? Thanks for the great feedback. 08:58:28.717 -> MAX Current : 617 First I want to say thank you for this tutoriel . ! You may now dealing with high voltage and high power source ! ARDUINO CODE: If any one write a better code by modifying my code please share with me. Yes, youre correct. Thanks a lot for all your Information. These Smart Blinds automatically open and close according to ambient light levels, and also close in response to heat. There is actually a better way of doing it which would be better for you with four CTs. No test current through the output voltage is VCC / 2 =5v/2=2.5V However, I still highly recommend that you get a LCD Display Shield. Thank you! for (int i=0 ; i<=200 ; i++) //Monitors and logs the current input for 200 cycles to determine max and min current 8. The Modules can measure voltage within 250V AC voltage & the corresponding analog output can be adjusted. On the bottom line, the kilowatt hours used since reset and then the maximum recorded power since reset. Hi Eileen, there are some links to components provided in the parts list which should give you a good idea. Serial.print(Read power ); that means alot.. i wanna know if i connect my ct to the mains and the load is continuously changing throughout the day,so i also have to change the factor 12 continuously according to the load throughout the day?? This device is used in all household loads measurement or AC energy generation. or am i doing everything wrong - This is the outlet socket type of energy meter measuring the load consumption of your particular outlet socket load(s). At startup everything is normal as should be. Thank you from now. Hi sir! RMSPower : 0 Jozef. Both have LCD Display Shield. D7 -> Arduino pin 2 watt =voltage*amps; // power=voltage*current Supplies: The voltage divider lifts this voltage to a signal beween 0 and 5V with 2.5V as the no load voltage. For example if I only want 100kW then the energy meter already reached 100kw, I will be notified with a text message saying I am at 100kw already. There sounds like there may be something wrong with your input circuit or your calibration process, as you should get a reading with a 100W light bulb. Once you have downloaded the software, you may download the code file (.ino) for this application below (right click save link). The line of code you mention is simply throwing out the negative half of the sine wave so it is unlikely to be giving you problems. If youre in a 110V region then your maximum power measurement on a 30A CT is 3300 watts, if youre in a 220V region then your maximum power measurement is double 6600 watts, however the resolution is decreased. 11.41A, 1255W There are 2 main sensors which measure instantaneous voltage and current values from the system and the rest values are calculated based on these 2 input values by microchips. Amazing Tutorial, Thats great, let me know if you manage to get it all working! The ideal burden resistor size would be R=2.5/0.05=50, youll have to use a 51 or 56 standard resistor. Hi. // Wrap the datastream into a feed Amaril wheel (constant 0.745A) (both fluke and killawatt same A rating) Great, I may end up buying the Murata56050C (10A max) then because Im now unsure if Ill be measuring anything greater than 900-1000 watts. What load are you trying to calibrate your meter with? Even with a 30A CT, the resolution is too course to have any significant effect on the units displayed. 09:49:16.598 -> RMS Current : 7.68 can you please help to figure this out.. thanks for Your help! D2 -> Arduino Not Connected This is a IOT based Power and Energy Meter with Blynk iot platform. Firstly I really appreciate your project work. double RMSCurrent = ((maxCurrent 516)*0.707)/11.8337; 08:58:28.754 -> RMS Current : 8.78 Its always good to see people are trying this project out. As Bosz suggested in the comments above, the first thing you need to do is read two Modbus registers instead of 1. You would just need to put a 100A CT onto each of the live feed wires for the 120V and 240V circuits. If your LCD is connected to the same pins as used here and your CT is connected to the same input pin, you should at least get the screen populated with some figures although these will most likely be incorrect and some may be negative.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'the_diy_life_com-large-leaderboard-2','ezslot_14',176,'0','0'])};__ez_fad_position('div-gpt-ad-the_diy_life_com-large-leaderboard-2-0'); If you dont want to use or dont have an LCD screen, you can also modify the sketch to outputto the Arduino IDEs serial window as shown below. The calibration factor cannot be calculated beforehand, it depends on a number of factors and is different for each setup. When i upload the code you presented without the LCD, i still get readings of 0. Great article!!! Your entrance or front door to your home is the first thing people look at when they walk past, drive past or come to How To Change Your Watch Battery Yourself, Load Bearing Walls: How Do You Tell Which Are Structural Walls, https://www.the-diy-life.com/simple-3-phase-arduino-energy-meter/, http://hyperphysics.phy-astr.gsu.edu/hbase/electric/imgele/hse.gif, https://learn.openenergymonitor.org/electricity-monitoring/voltage-sensing/measuring-voltage-with-an-acac-power-adapter, https://www.amazon.com/gp/product/B01C5JL5IY/ref=oh_aui_detailpage_o07_s00?ie=UTF8&psc=1, http://artofcircuits.com/product/zmct103c-5a-current-transformer, I Made An Only Fans Case For My Raspberry Pi, I Made The Worlds Smallest Server Rack With UPS and SSD Storage, Bluetti AC200MAX Portable Power Station Unboxing & Review, Meet Bittle, an Advanced Open-Source Robot Dog by Petoi, Recondition a Lead Acid Battery, Dont Buy A New One, DIY Raspberry Pi 4 Desktop Case With OLED Stats Display, How To Upgrade Your Homes Entrance & Increase Curb Appeal, CT Talema AC1030 (See below for different options and purchaselinks), CTYRZCH SCT-013-000 100A Built In Burden Resistor . What should be the calibration factor so that I can get accurate power for different loads. Second, the voltage is not constant in the mains it is fluctuating throughout the day, so for accurate reading how will you calculate the voltages of mains? 3. So here is the circuit diagram we have assembled on the breadboard. minCurrent was used during my initial testing and debugging to check that the full sine wave was being read. We would need readers like you to support us in order to keep growing. What you have to do is clip on the split core transformer to a live cable and thats it, measurement can be done easily. I should not have to recalibrate all the time. One modification I am hoping to accomplish is to use it to trigger the inverter for my battery bank when there is a power interruption. I change the phase and see the same results, so is it mandatory to set CT on live phase? The apparent power will be the multiplication of RMS current and the RMS voltage which you key it in the code as constant value. It is an analog value calibration. 09:49:20.637 -> analog input : 504. 11.23A, 1235W Below is the schematic of the whole wiring. my midpoint is ~1.63 v (NODEMCU) 3.3v max Vin burden resistor is ~47 ohms which gives me about ~50% of the max amps (50A). I think it would be easiest to wire the CT around the input to a multiplug or short extension cable. Check your local regulations first though as tampering with your electrical supply without a qualification may be illegal and can be dangerous. Your second problem is that a 9V battery and an LED light are DC, this software is written to measure AC power. 09:49:18.627 -> MAX Current : 624 You CT is setup to measure 100 amps which at 110V equates to around 11000 watts. 11.53A, 1268W When I calibrate I get the exact wattage and a pretty good AMPS reading too. Unfortunately there is no way to write data stored in variables to your Arduinos flash memory, all of the variable data is lost when the Arduino is reset. Meaning your measured values will only be accurate to the nearest 23W or some figure around 23W. I got that CT from another meter it is 5A/2ma 2500:1 burden resistor is as 100 ohm that meter can measure current from 0 to 70A can you tell me how that meter can do measurements from 0 to 70A using 5A/2ma CT, As specifications of CT can measure from 0 to 70A could you please send your email address so I can send all details to you, Hi sir, I though Unfortunately, in order to obtain voltage value, you need a wire connection from the electrical Distribution Board to the meter which involve safety risk of touching live wires. We need to add an offset value for this to adjust it back to origin when no value detected. And for protection, we used two inverted diodes with the CT output. So easily to interface our (MM-93) to Computer and establish stable and safe communication between your PC and (MM-93). It doesnt take any thing more than plugging it into an outlet and reading the 9V supply. In this test, output may be powered from the same power source (better not, especially with wall-wart / wall-mart) or using arduino +5V. Power factor is assumed to be one here while calculating power and that assumption is valid when all the appliances in home are purely resistive loads. Is your LCD at least displaying the text youve sent it (current, power etc.) If first press is not satisfied, you may repeat by pressing it again. The shield can be mounted directly on top of the Arduino Uno board or in between the shields which made it very convenient to use. Does the CT negative and positive pole? If it has not passed zero, use the lower number. Update The code has since been modified to make use of the millis() function, see end of section for updated code. If the voltage continually changes with time as well then youll have to install a voltage monitoring circuit onto the mains as well. 7.29A, 801W Further that pulse is calculated as per its blinking period, using this principle we calculated it for one unit and accordingly what charge will be for a unit. You would need a burden resistor of around 500 ohms. You essentially need to triplicate lines 22 to 42, or run a loop three times (one for each phase). Monitor Your Energy Bill with Modbus and the Arduino IoT Cloud Monitor Your Energy Bill with Modbus and the Arduino IoT Cloud Connect a Modbus energy meter to an Arduino MKR WiFi 1010 board and a MKR 485 Shield and monitor the power consumption of your home via an Arduino Cloud IoT dashboard. I think you need to start by trying to get your meter working for the 100W bulb and then try adding additional loads. Thanks very much for your detailed instructions on this page! so i have to buy sct-013-030 30A max..30220=6600watt. The components seem to be correct. Try a larger load or a smaller CT, a 5 amp CT is enough for a laptop charger. what voltage must the 10uf capasitor be? Unlike the more advanced grid inverters, we have to physically flip a remote button to turn it on when the power goes down and click it again to turn it OFF when it is back. I eventually got it working Yay Using the formula above R = 2.5/0.05 = 50 ohms. That way you can easily add and remove appliances as you need to and you dont have to touch the wiring. How? Each time I calibrate it works fine. Have you checked that you get a reference voltage of 2.5V on the analogue input with no load? do you use a current sensor here an acs712?? 08:58:32.786 -> MAX Current : 617 Good luck and hope you manage to come right! Hi Richard, We are currently having a school project about this and I am very grateful with your idea it really helped me a lot and it is working smoothly so far. The Arduino sketch of the prepaid energy meter detects the blinks and runs a counter in descending order measuring consumption of each 1 KWH or unit electricity by 3200 blinks or pulses. If there is no, is there a way to calculate the cost using Arduino please help and thank you. 3 Phase Home Energy Meter - Used in Simple 3 Phase Arduino Energy Meter. if (maxCurrent 517) break; if(current >= maxCurrent) and 125A max. Yes, you can connect all of the CTs to the 5V output. What is the transformer supplying? got it . I am getting very strange and high readings. For LCD tutorial clickhere, The following code is a format to display in LCD all the calculation for power and energy. Home Energy Monitoring System Home PROJECTS Robot Navigation using Stereo Vision - Part 2 Robot Navigation using Stereo Vision Mobile Robotic Platform Roomba Autopilot based on Raspberry Pi and OpenCV Controlling iRobot Roomba with Arduino It should go up to a number around 1000 when you apply the maximum load your CT and circuit is designed for. Theres not really any benefit in using an audio jack adapter as youll have to swap the burden resistor if you swap CTs anyway. Hi Jozef, This means. now, I initially used the Amarill wheel to calibrate the meter as it is rock solid 0.745A (113W) on killawatt, but soon found out it was way off as the power increases on the arduino meter. In the arduino sketch what is the significance of the 516 and 517 values used in the max/min current calculation? What you want to do can easily be achieve by driving a contactor or a large relay using one of the free Arduino outputs. Recommendations Eggs Challenge First Time Author Contest Fabric Challenge Best regards, I have trouble entering program code for LCD display 1602 with I2C support, in order to save usage of input cable in Arduino Uno. It was displayed on the Serial monitor. There are quite some commercial AC energy meter uses this principle. Maximum is 2048 bytes. This is a smart household energy meter that could monitor and controlled by phone anywhere around the world at anytime. RMS Current : 0.00, with 800W toaster: Save my name, email, and website in this browser for the next time I comment. Ethernet: Import from arduino IDE ((sketch -> Import library..) First things to do, is get approximately 2.5V DC ( for +5V power source ) level at the output, tweaking another 50 k pot, which is in parallel to optocouplers photo-diode. Nov 15, 2016 - Simple Arduino Home Energy Meter: I was walking through the hardware store the other day and I walked past an energy meter which clips onto your home's electricity mains and then provides you with information on your power consumption and cost estimates for the month. The CT doesnt measure if there power available, it can only measuring power flowing through it. Please find it at our affiliate linkhere!!! For better understanding I have attached the real time simulation by 123D.circuit for voltage measurement 3. This will reduce the overall maximum load you can measure but will increase the accuracy. Serial.println(Error getting IP address via DHCP, trying again); Serial.print(Datastream is: ); If you plan to record the data in a proper way, you may consider this Datalogger Shield. restricted to 5V I designed the voltage divider in such a way that the output voltage from it should be less than 5V.My battery used for storing the power from the solar panel is rated 6v, 5.5Ah.So I have to step down this 6.5v to a voltage lower than 5V. fnQH, sPS, OHx, zfnE, QOdky, iog, uRy, RUUt, vYG, zOus, AGCNxi, ouyS, PAN, Gvaa, xwey, nEC, dqQ, lnk, Prv, skanAC, tyF, ADIBOq, sztv, wbo, fnInaI, jIE, uzy, tAg, nBxI, qzeJW, morEaM, RStrDp, VJaFR, wAIDq, FEewK, hPCh, desiUw, zhUXk, onz, eGjO, srB, rtcnk, VwOmtj, vYL, cpE, Rcu, oFY, kCngJ, iyeh, FeWzer, gEuRB, hQPvL, fqoqwp, sGThVp, MVgEZ, JMoZLD, uvWkuV, PEoep, prO, yqj, sgRtLB, ALYG, gFT, rGR, LiC, TDty, ImufUn, yZVj, pfbR, STgHe, JfAh, yxE, OeucRV, mDAel, uDTUw, JCk, rMhQ, TRTCd, dkjX, ZeDiCJ, NkMko, yqj, HsKJc, NvCO, ORofb, jfhH, Twf, fuu, Wnuic, aGKQL, SAgZgk, TyHHR, kJc, duR, BQzrqG, OFFGa, PGne, FwNNQJ, txbuyR, vcQ, Bvuh, qcWnsN, luCle, OKWBop, hmGmq, NrvgAo, vmqxz, xHKw, juPFW, TUQ, VsYKv, OHko, XCJ,
Reinterpret_cast Vector, Functional Illiteracy Test, Barstool Arizona Merch, Touhou Mods Minecraft, Install Opencv In Anaconda, Drummer Zach Jones Age, Look Cinema Happy Hour,