Almost every country, country and region has different tariffs, free portions and methods of charging for electricity so its difficult to just create a generic cost. It works by using a crumble microcontroller, I love the idea of the BlinkM (individually addressed RGB leds controlled with 2 pins),, Advantech, a leading provider of industrial computing platforms, is pleased to announce the UNO-247a fanless, //////////////////////////////////////////print power and energy to a LCD////////////////////////////////////////////////, Arduino Tutorial Online Courses Video Training, Huge List of tutorials & Components based resources & info, Huge List of tutorials & Components based resources, Arduino Complete Projects List PDF Downloadable, Arduino Mega 2560 projects list in PDF offline downloadable, Arduino UNO Projects List in PDF offline downloadable, Arduino Proteus Projects List for Download, esp8266 arduino projects list in pdf offline downloadable, Android based arduino Projects List Download PDF, Arduino Nano Projects List in PDF offline downloadable, STMICROELECTRONICS RAISES PERFORMANCE AND VALUE FOR SMART, CONNECTED DEVICES WITH EVEN FASTER STM32H7 MICROCONTROLLERS, TEMPER: SLEEK TEMPERATURE SENSOR BUILT ON ESP8266, Lightning Shutter Trigger for a Camera using Arduino, Dr Blinkenlights (or how I learned to afford the BlinkM), ADVANTECH LAUNCHES UNO-247 FANLESS ENTRY-LEVEL EDGE COMPUTER FOR IT APPLICATIONS, Choose a username, password, set your address, Give a name to your device and description (e.g, Choose private or public data (I choose private), Add Channels (I Choose ENERGY and POWER, but you can choose according to your choice), API keys (used in ARDUINO code ,avoid to share this number). VSS -> Arduino GND As Bosz suggested in the comments above, the first thing you need to do is read two Modbus registers instead of 1. Other problem is when I start this without ON the bulb it gives me 184W and 0.84A. You need to use around a 1/3W general circuit resistor. can u explain these factors please and i just want to know that, these factors are fixed or i have to change them according to the ct?? But really to hard to check all 100k comments hahahhh. delay (2); Thanks again. The CT doesnt have a polarity, it doesnt matter which way around its connected. So this code samples about 2.5 full sine waves. Hi Stas, You can get it at our affiliate link here !!! Hi Tim, SparkFun Non-Invasive Current Sensor - 30A, How to Build an Arduino Energy Monitor and Data Logger, One Button Click Artificial Intelligence Based Home Monitor. I have a graduation project to calculate the cost of kilowatts. The CTs rating needs to be higher than the current youre trying to measure. Step 4: PCB Design and Ordering. I had to add an extra line to the WHILE loop (if (maxCurrent > 517) break;) to break out of the loop. Connect Tx of ESP12 -> Rx of Arduino. RGB LEDs triangular/hexagonal pixels matrix. You should therefore be able to measure 2.5V at the Arduino input with no load if the divider circuit is working correctly. if (millis() lastConnectionTime > connectionInterval) Where did you buy your Current Sense Transformers (CT)? 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. Do not remove any wires or remove any screws before checking with your local authority, you may require a certified electrician to install the CT for you. UNI-T Multimeteris a good quality with decent price. Ok, I understand why youve used a larger CT. Its probably still a bit large for a 30A application but you could make it work. It looks like your energy meter is working reasonably well. 09:49:16.598 -> RMS Current : 7.68 Hi, thanks for the tutorial, am planning to make a energy meter for my basement and I think this will be great, I just have one question, I s there a way to record the kwh value (to arduino memory) so when the power goes down the last value will be stored in the memory and when It comes up again the value will continue where they left other than start from 0, Hi, thanks for the tutorial, am planning to make a energy meter for my basement and I think this will be great, I just have one question, is there a way to record the kwh value (to arduino memory) so when the power goes down the last value will be stored in the memory and when It comes up again the readings will just continue from the last value other than start from zero, What do you think ? Hi Alay, Next you need to size your burdenresistorR3, this converts your CT current into a voltage reference. Why the program give me 184W and 0.84A values when I turn off the bulb. 09:46:13.560 -> MAX Current : 571 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? int sensor2 = energy; 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. Youll need to hook up the CT to one of these two wires and set the voltage in the Arduino, then it doesnt matter what happens down the line or how it is split up, everything being fed off of your homes mains will be monitored. If you put the CT in after the inverter and mains changeover relay you could even add a second screen to the energy monitor which tells you how much power has been used from the mains and how much has been used from the inverter. R = 2.5/0.002 = 1250 ohm. Warning ! I tried some but it doesnt work. now i having problem with my progress where all my readings on serial monitor shows zeroi been so frustrated with this situation as i cant find solutions to solve ithope i can solve it as soon as possible as death line is close. Hi Marius, Control your household devices and get alerts about home no matter wherever you are! The energy meter is installed in the homes or offices. Hello Michael, kilos = kilos + (RMSPower * (2.05/60/60/1000)); Bring your ideas to life without considering that how to program a server to create a host for web communication using TheAmplituhedron. Fundamentally, if you trace it back as far as possible, you should only have two wires coming into your homes supply board (three with earth) and this should either be 110V or 220V depending on your location. If it has passed zero, use the next higher number. 11.29A, 1242W Projects. How? Hi Meru, Unfortunately Im not that familiar with the ADS1115 but what youve said sounds correct and it looks like youd be able to use it. Yes, youre correct. actualval =val-2.5; // offset voltage is 2.5v You can download the .ino file to see for your own. 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. D6 -> Arduino pin 3 Completely new to electronics. #include
We shall not be responsible for anything happening to you. 08:58:04.279 -> analog input : 505 Collates local weather data on Google Sheets and interprets it with a neural network model built w/ TensorFlow to predict rainfall intensity. Does the back light come on? really wait*** for your response sir. Even after the first calibration is made, there are still some minor ghost or electrical noise even when no current are measured. Does it drop down when you unplug the heater? More modern ones tend to have better power factors and will work better with this energy meter. void getData() We dont have access to the transformer because its on the power poll and its illegal to tamper with it. I saw when using the 3.3v with the lcd the contrast is verry light can hardly see anything on the lcd, And thanks again for all your help would not have been able to do without your help. There is 2source codes file attachedwhich are source code with and without Datalogger shield function. 2. In his case, he used a YHDC SCT-013-030 sensor that can measure up to 30 amps and costs. D3 -> Arduino Not Connected 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. Get thefast connectorat our affiliate linkhere!!! Hi, Sir Hi Mateo, Due to this problem I designed a solar system for my home on a experimental basis. Once your code has detected no current, use a WHILE (maxCurrent == 516) loop to keep checking that the current is still 0. 20W is only 0.09A which is 0.003% of your maximum so your resolution will be bad at the lower end. My CT is TALEMA1020, and my computed burden resistor is 42Ohm so i used 39Ohm as a standard value nearest to my computed resistor value. The number 516 denotes the midpoint (zero current) of the sine wave, increasing/decreasing this number will adjust the zero point until your meter reads zero with nothing connected. 6. Hello According to the datasheet, with a 100 ohm resistor the output voltage should be 1V/1A. This will reduce the overall maximum load you can measure but will increase the accuracy. I was able to build the circuit with a relay that will get triggered once the monitor indicates no power. US $7.77. You should be using around a 2-5A CT. Ive followed the instructions. Hi Karthik, The proposed system utilize Arduino UNO microcontroller. I connected as you mentioned but the lcd screen is not showing any display.Not a single digit is appearing .. 08:58:08.397 -> RMS Current : 0.43 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. Youd then just implement some logic on your Arduino which switches the devices on or off through the relays depending on the current being measured. This setup only works for resistive loads. You need something which will continuously be trying to draw power from the mains (a light bulb for example) so that when it comes back on, the CT starts reading energy usage and can then turn the inverter off and change the supply back to the mains. In order to connect wiring between Arduino board and module, you need thedupont line cables male to female. After connecting (MM-93) to your PC, you can ask it to send you any input/ output measurements through the Serial monitor. For Arduino Code Files, Remember to Right Click > Save Link As You may alter the internal code as you wish. If first press is not satisfied, you may repeat by pressing it again. I guess at least 2 full AC sine waves should be monitored for max and min. what voltage must the 10uf capasitor be? We have 2x 110 legs that when combined are 220. it doesnt look like a CT, is there something else im missing? But in case of reactance loads it is necessary to moniter both Voltage and Current. Your project has helped me understand many things. If you still not yet own an Arduino Micro-controller Board, you can get it cheap at our affiliate linkhere!!! All my major appliances run on 220 but the minor ones 110. double RMSCurrent = ((maxCurrent 516)*0.707)/11.8337; ZMCT103C high precision PCB mount micro current transformer converts a high primary current into a lower secondary current. I think youd need to re-look the sketch entirely to achieve the sample rate you require. If this still does not work then try the first version of the code and see if that works on your energy meter? 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. 08:58:28.717 -> analog input : 426 You can connect it to either the live or neutral phase and it will work correctly with the same result. but I got 170W when nothing is connected! The CT doesnt measure if there power available, it can only measuring power flowing through it. There are quite some commercial AC energy meter uses this principle. I am getting false readings no mater what you do with this (516)*0.707)/9.8337) for calibration. Step 7: Install the APP and Set It. Then duplicate the circuits and code here so that you have a 120V CT calculation and its calculated outputs and a 240V CT calculation and its calculated outputs. Prepaid Electricity Energy Meter is a good concept in which you can recharge its balance, like we do in our mobile phones. In this project we are building a automated system by using Arduino and GSM module. Get it at our affiliate link here !!! No problem at all, were glad youve managed to build one of our projects! It can also disconnect the home power supply . Im not sure where you live but your voltage really shouldnt be fluctuating significantly enough to have an effect on the readings. 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 them. I guess I couldnt. The reason I took such a big CT to start was my intention of using this with my 9000 watts gas generator and monitor my usage during an outtage. 11.17A, 1228W What have you used it to monitor? You're at your Office and want to know about your home? void setup() I have CT Talema AC1050 which have 50A nom. Ive just published a guide to make a 3 phase energy meter, have a look at it https://www.the-diy-life.com/simple-3-phase-arduino-energy-meter/. Hello, Michael Then I decided to monitor the voltage, current, power & energy involved in the system. This videos explain a lot of details about the project fabrications: Command U: (MM-93) will send you all the measurements of the Utility Input. Thats great, so you know your hardware is partially working. AC Power Measurement Using Arduino | Code | Circuit | PCB | Module. All the readings show 0. (is there a posibility that the data will remain when i turn off my Arduino and when i turn on it will display again or retrive the last data display in the LCD??? In the attachments section , you will find a technical eBook explains the Project processes from Zero to Hero. Either way, you need to put the CT around one of the supply cables, preferably the red live cable. void loop() Firstly I really appreciate your project work. Because this meter does not measure the voltage as well, it is measuring apparent power, which is good for largely resistive loads. You may be able to source cheaper components at your local electronics store. 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.. Your article is very interesting but I face a problem : Thank you so much for the tutorial. I have ohm the CT , 102 ohms. So I removed the external burden resistor (as your blog suggested 130 ohms) and tried the system there after. Connect LCD with ARDUINO as given bellow : LCD -> Arduino 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. Hope this explains it better. To calculate DC power you can simply multiply the measured battery voltage by the measured current through the ACS712. Thank you for this great project! its a great work.The doubt i have is it possible to show in LCD display how much money it cost based on our kwh conception.if it possible how can i make it? 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. We were usingUT33C model. Hi CS, The Arduino doesnt permanently store any variable data, if you turn it off then you loose all your recorded data. Yes, the AC1030 has quite a lot of space for components, it really is a nice unit to work with. This gives a resolution of 4.9mV per division which is quite sensitive: 5000mV / 1024 = 4.88mV You essentially just need to add an AC transformer that steps the 220V/110V down to 2.5V and do a similar thing to the current input, but reading the two simultaneously. I had a look around online at what others had done but they all seemed to be a bit over complicated for a simple home application. I was wandering how to measure a United States home with this at the Main. Check your connections again if you continue to get erratic readings. The system. Voltage is measured by the help of a voltage divider circuit.As the ARDUINO analog pin input voltage is maybe some resistors and LM385 to step down the voltage instead. Thanks for any help you can provide. The good news is you do not need to manually calibrate the offset settings if you got theLCD Display Shieldwith you. If you are looking for a more simple solution, the standard Arduino Ethernet shield has an SD card reader built in. New User Deal. The current sensor that is widely used for Arduino is theACS712 Current Sensor Module. 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. long milisec = millis(); // calculate time in milliseconds You have writing talent. 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?? 450mah lipo (capacity is optional) with charging circuit. This is a fun project and your help is proving that I need to do more reading on this CT stuff. In summary at first the Arduino microcontroller measure the voltage, current, power and energy data then shows it to the display and sent the data to nodemcu via serial communication. This meter could not measure AC Voltage since no direct contact made. PZEM-004T New Version TTL Modbus Power Energy Watt Meter AC 220V 0-10A Electricity Volt Amp Wattmeter Kwh Voltmeter For Arduino. It utilizing hall-effect phenomenon which voltage is produced from the movement of current within the region of magnetic field. 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. 11.05A, 1215W I picked up the CT from a local electronics supplier. Ok so i finally understand the solution of the factor problem..thank you sir. here is my formula: Currently there isnt any significant progress as I am facing many problems in drawing the accurate schematics of the project. Serial.print(Energy value is: ); } Is that right? 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. He however took the project one step further and integrated an Ethernet connection to enable the data to be seen via a web server. Hi Dani, Thesecond calibration is to further eliminate false signal value after RMS calculation. Thanks sir.. Hi Mico, Of cause you need to have the LCD shield in order to work. Thanks a lot for all your Information. Great and detailed tutorial. I have built with this a YHDC SCT013-030. If youve changed all of your electrical demand onto your inverter, there will be nothing to draw power from the mains when the power does come back on. When the pointer is directly on a number, look at the dial to the right. Thanks a lot for your quick feedback will you please share some technique how can I do that? 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. Measuring AC power is somewhat different then the way it is done in this post ! 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. The process started by registering the mobile number of the user with the help of GSM. stay healthy and happy. Here is the link to download the updatedMillis Metercode. Here are the readings that I got: If any one write a better code by modifying my code please share with me. You will need to calibrate it yourself, I cant give you the settings as this is based on actual measurements taken with your own setup. 08:58:30.774 -> RMS Current : 8.78 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 I have a question to ask u ,I have a CT sct030100 ,it doesnt have a burden resistor , my question is what the value of the resistor that I should use? The problem with your application is that youre working with pretty large scale equipment working at potentially dangerous voltage and high current. The figure maxCurrent = 516 is used to filter out only the top half of the sine wave. If youre getting a reading with your CT removed then you havent set your calibration factors correctly. 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. I can control contactor of heating resistors in boiler according to current. I am not to sure what you are asking about the resistors? Hi all, Are you sure that the display and the meter do not have any common pins on the Arduino inputs? Unfortunately it does not have a low voltage relay in it to turn the inverter on and off. 3. Other than disconnecting and reconnecting two panel feeds it involves only low currents and as an added bonus we will know how much power we are using when the emergency system is on. 08:58:04.317 -> RMS Current : 0.43 Warning ! i upload your program and nothing displays on LCD When i upload the code you presented without the LCD, i still get readings of 0. 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