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 . Refer the above screenshots for better under standing. sendData(); // send data to xively 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, 3. // complete message from arduino, which consistors of snesors data. Safety and Precaution must be always have in mind. Im not sure what the correct value is. These little devices clamp over an AC wire and detect how much current is passing through it via induction. Circuit diagram for IoT based Energy Meter using Arduino and NodeMCU is given above, connect ESP12 as below: Connect Rx of ESP12 -> Tx of Arduino. I am an electrical engineering, final year student. Energy monitoring by 09:46:13.560 -> MAX Current : 571 Hi Michael To answer your question, we are only looking at the top half of each phases sine wave. I used burden resistor as 100 ohm resistor lcd.setCursor(1,1); // set the cursor at 1st col and 2nd row Thats great, let me know if you manage to get it all working! Hi Alay, I used 5%RM 56 R Rezistor 2W as borden resistor. Unit of Energy is Watt Hour or Kilowatt Hour (kWh) thus it should sent as an sms what the LCD displays. Once you have downloaded the software, you may download the code file (.ino) for this application below (right click save link). Serial.println(datastreams[1].getFloat()); byte mac[] = {0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED}; The CT is a 100A rating. To calibrate your energy meter, your need to be sure that the current that your meter says is being drawn is what you expect is actually being drawn. RGB LEDs triangular/hexagonal pixels matrix. lcd.print(WH ); VO -> Arduino GND pin + Resistor or Potentiometer what maxCurrent = 1000 means? D7 -> Arduino pin 2 It looks like your energy meter is working reasonably well. 20W is only 0.09A which is 0.003% of your maximum so your resolution will be bad at the lower end. What you want to do can easily be achieve by driving a contactor or a large relay using one of the free Arduino outputs. What are you using as your 100W and 200W loads, how accurate are they? It seems that the meter is accurate on a specific scale and thats it, anything higher or lower goes out exponentially. Since this meter is meant for DIY enthusiasts and not electricians, I steered away from a direct connection as there are a number of risks and legal implications. In the case of an electricity meter a pulse output corresponds to a certain amount of energy passing through the meter (Kwhr/Wh). I tried to change capacitor, or use without, but still same, is possible I have wrong arduino? It utilizing hall-effect phenomenon which voltage is produced from the movement of current within the region of magnetic field. I realized that it did not want to work on my breadboard so i made a pcb and soldiered everything an and bobs your uncle all working. In this case it was 11.8337, it may be higher or lower depending on your application. 08:58:28.754 -> RMS Current : 8.78 There is 2source codes file attachedwhich are source code with and without Datalogger shield function. Hi all, I cant seem to get it calibrated correctly. This is the outlet socket type of energy meter measuring the load consumption of your particular outlet socket load(s). I will not display the code here because it is long. That way you can easily add and remove appliances as you need to and you dont have to touch the wiring. hi sir, If you are connecting it to your mains, connect it to one of the output wires after the main breaker as shown below. The Amps match my clamp meter. Save my name, email, and website in this browser for the next time I comment. Can you tell me what does maxCurrent and minCurrent actually record? The current sensor that is widely used for Arduino is theACS712 Current Sensor Module. You can connect it to either the live or neutral phase and it will work correctly with the same result. 09:41:22.703 -> analog input : 545 I have a graduation project to calculate the cost of kilowatts. Thanks in advance.. No you wont need to constantly change it. The millis() function returns the no of milliseconds since the Arduino board began running the current program. As youve said, its best to get the smallest possible CT for the largest load you expect to measure. The code is also fairly similar. EthernetClient client; 3. I try a 40watts soldering Iron but nothing change on its value. I used the Talema AC1030 as per the parts list. I do not know why, but all three give me exact same values and they do not change a bit. Each time I change the load, I need to recalibrate. 512 is therefore the middle/zero line of the sine wave in an ideal environment, in my case 516 was the calibrated zero line. I used a solar panel of 10 Watt ,6V for lighting few bright LEDs. // that you define how often to send data to Blynk App. I would like to ask it i can add another function where i will add another LED light and will light up when the amperes detected were lower or higher than a given range. The connections to the Arduino are the same without the resistors and capacitor 1, one connection to Gnd, one to 5V and one to analogue. ! // MAC address for your Ethernet shield 7.29A, 801W We need to add an offset value for this to adjust it back to origin when no value detected. http://hyperphysics.phy-astr.gsu.edu/hbase/electric/imgele/hse.gif Serial.println(Uploading to Xively); This second calibration must be done only after the first calibration take into effect. Vout=10/(10+10)*6.5=3.25v which is lower than 5v and suitable for ARDUINO analog pin The CT doesnt have a polarity, it doesnt matter which way around its connected. which explains the Project processes from Zero to Hero. Hi Marvin, I just do the same like you and everything is worked . Here meter is interfaced with microcontroller through the pulse that is always blinked on the meter. The line in the code you are referring to is doing the unit conversions, from seconds to hours and into kilowatts, as described above and the 2.05 is the time period (in seconds) I am referring to. I was wandering how to measure a United States home with this at the Main. RMS current is the peak current multiplied by 0.7071 or divided by the square root of 2. 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. Its also really easy to add your local tariff and display the cost of electricity used to date. The easiest would probably be to get rid of the LCD shield and use an Ethernet shield. XivelyClient xivelyclient(client); If it is just a simple transformer and not a high quality power supply it will also show you the variations in voltage level. Hi Mico, 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. The two variables maxCurrent and minCurrent read the peak (minimum and maximum) values of the wave to calculate the RMS current at that point in time. The CTs just use the voltage as a reference, the circuit draws very little power from the Arduino. The closest standard resistor value is 56, so this was used.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'the_diy_life_com-banner-1','ezslot_12',175,'0','0'])};__ez_fad_position('div-gpt-ad-the_diy_life_com-banner-1-0'); Here are some options on different CTs and their ideal burden resistors (in standard sizes): The capacitor used is 10F which should be sufficient for most CT ranges for household applications. Vbat=6.5 when fully charged void sendData() From Data Sheet I would like to use it in home where we have electric heating too, that common current is 10-20A each phase. Hi CS, what is that 10k element that is used on the schematic from autodesk With LCD Display Shield, once the code is uploaded to the Arduino board, the current value will be shown on the LCD Display. But as per data sheets offset is 2.5V (When current zero you will get 2.5V from the sensors output) -> not OK for inductive loads (microwave oven fluorecent lamps, ) 09:49:14.568 -> RMS Current : 7.68 The data sheet should tell you what voltage output corresponds with full load on your CT, do you know what this is? Hi, And for Ac voltage calculation,can i use Ac-Ac 9v adaptor with some resistor and capacitor then connect it with the arduino? This will reduce the overall maximum load you can measure but will increase the accuracy. You can get it via our affiliate linkhere!!! I am on 110VAC, so I changed the one line from 220 to 110. 2. So I built my Smart meter model (MM-93) based on Arduino with some awesome features, hope you like and enjoy the project. Yes, you can connect all of the CTs to the 5V output. Im realizing a project in which I have to sample the current at a minimum of 600 Hz to reconstruct the synsoid. Thesecond calibration is to further eliminate false signal value after RMS calculation. Or maybe I am wrong in a shape of input signal at pin? When I start the program it shows 220W and RMSCurrent is 0.96A I have ohm the CT , 102 ohms. This project is shared under the Creative Commons License: The best resource for tech and electronics projects, tutorials and reviews. The ideal burden resistor size would be R=2.5/0.05=50, youll have to use a 51 or 56 standard resistor. I was able to build the circuit with a relay that will get triggered once the monitor indicates no power. It allows your arduino to record your data in SD Card. Connect LCD with ARDUINO as given bellow : LCD -> Arduino amps =actualval*10; For time measurement there is no need of any external hardware, as ARDUINO itself has inbuilt timer. . First off thanks a lot for this. (Surely a dum question to you ). And for protection, we used two inverted diodes with the CT output. Serial.print(Power value is: ); Using the millis function, record the start millis and finish millis, calculate the difference and that is your time period. 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. But I change borden for 100R and 87R and still get very wrong numbers for 100W bulb and 900W with toaster: with 100W bulb: 32A) cause if you google the specific transformer in the specs you can see that it can measure constant current of 0 60 A. [/box] For more detail: How to build a whole home energy monitor using Arduino Previous Post Next Post Required fields are marked But my question now is this sound correct? Can you help me building almost same thing, but I need relay for a safe shutdown. The last thing id like to ask is how do i set it up for 3 Fase do i replicate the setup x 3 and replicate the code 3 times and add the 3 together? what is the minCurrent and Max current and how the minCurrent = 1000 ? Adafruit have a good library for driving these displays. 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? datal. The cost of electricity used to date can be added and displayed easily. after I read another your meter project comments, I am confused if was not better idea used 25A CT. (But in our market there was only two option of CTs 25 and 50, I choose 50 because was afraid if less A CT will start heat in peaks. Hi Danny, } 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. You can stack up screw shield, Datalogger Shield and LCD Display Shield on top of Arduino UNO. I stumbled onto your project and I have been using your Arduino sketch, because you have the kwh calculated. 08:58:06.310 -> RMSPower : 100 There is one analog pin available in NodeMCU (ESP12), we could use that pin but ESP series can take upto 3.3 volts on their pins. I have one question regarding the code. North Holland. Try displaying the raw value from your analog input onto your LCD for troubleshooting. Technically it still left Analog Pin A1 to A3 for AC Current pin. 7.23A, 795W Some people are concern about safety and do not want to do any wiring on the existing electrical system. I tried to use IF and WHILE functions but couldnt get it working (its been a while since I have worked in C). The output voltage of this sensor is2.5V +/- 0.625Vwith decent accuracy. 09:45:53.161 -> RMSPower : 0 09:41:22.776 -> RMS Current : 3.34 what current sensor did u use ? Nothing else needs to be changed in the circuit. I think youd need to re-look the sketch entirely to achieve the sample rate you require. This shield provides a lot of convenient terminals for each of the input and output pins. 1. All the calculations are done in the digital domain on an Arduino. 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? So in the epm, nothing but its a non volatile . P1. You may have to wait about 5 seconds long until all values are re-calibrated. 450mah lipo (capacity is optional) with charging circuit. I used R1=10k and R2 =10K. It is. Good luck! Thanks. Step 7: Install the APP and Set It. 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. but current is calculated but the kwh finding not working how can in this project we enter AC current to arduino board ?? In my case, just under 516 happens to be the zero line of the sine wave. The Meter can measure up to voltage range from 0 - 26V and a maximum current of 3.2A. 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. 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. and do i connect the cts on each analog port ex A1, A2 , A2 ? You may now dealing with high voltage and high power source ! One is for Arduino and one for the nodemcu. The wattage stays at 3331W with or without the CT connected. You have entered an incorrect email address! I have built with this a YHDC SCT013-030. Warning ! Thanks for u r reply. RMS is the root mean square. Amazing project, I managed to fit all the components into the AC1030, so it looks purpose brought!! How would you save the information onto a SD card. Either your CT is not sized correctly for the load you are trying to measure, or your circuit is faulty or there is an issue with your calibration. Start by opening up the Serial monitor and then adding a line of code after the analog read function to print what is being read on the analog input connected to your CT. Update The code has since been modified to make use of the millis() function, see end of section for updated code. My main goal is to calculate kw used by my heat pump (Condenser, AHU and heat strips) and my hot water tank. David, Hi Kevinoel, If you stacked up a LCD Display Shield, Analog Pin A0 is automatically occupied by the button function. The system allows users to get energy consumption updates via SMS, as well . I though You dont have to reconfigure anything in the code, there is no reason why you cant connect both the LCD and the energy meter to the Arduinos 5V pin. More modern ones tend to have better power factors and will work better with this energy meter. Your meter will then be ready to use. Check your local regulations first though as tampering with your electrical supply without a qualification may be illegal and can be dangerous. It hampers the life of every one. Is there a code to add to the Arduino porgram in order to calculate the cost of operating the watts . 6. We can monitor those calculated data on 0.96 inch OLED Display as well as on Blynk 2.0 IoT platform from anywhere in the world. Thanks for your suggestions Michael. thanks for Your help! thanks. What rated Burden resistor should i use for that CT. 08:58:32.751 -> RMSPower : 2020 Ive calibrated to a 30 watt transformer and to a 60 watt light bulb. MAX Current : 516 Apart from these it also monitors the ambient temperature which is important for solar . As far as I know, there is no way to monitor voltage with a CT. In this way the Apparent Power can be estimated. And can i calculate the bill using the kwh or units? I change the phase and see the same results, so is it mandatory to set CT on live phase? Hello I have an arduino one and the SCT-013 will be able to send me ohotos of how i made the connection in the arduino and the code used thanks [emailprotected]. else if(current <= minCurrent) If that is the case then youll need to incorporate an AC voltage measurement module onto one of the Arduinos inputs. If this still does not work then try the first version of the code and see if that works on your energy meter? so, when I built this I didnt add any Burden Resistor but Im using 2 x 100K Divider Resistors and 10F Capacitor. I have: CK 10uF 50V 105C which is electrolyte, and connected negative pole to GND, positive to resistors (100K). The voltage produced by hall effect is directly proportional to the applied current making it suitable to estimate the applied current from the voltage sensed. A2 to A0). Some modules might not showing exactly at analog value 512 when no value is detected (I have shifted it to 0 point using Arduino code for easy understanding). One of our readers, Filip Ledoux, built his own 3 phase energy meter which is based on our original Simple 3 Phase Arduino Energy Meter. Elster A100c) each pulse usually corresponds to 1 Wh (1000 pulses per kwh). 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. For Arduino Code Files, Remember to Right Click > Save Link As You may alter the internal code as you wish. // taking 150 samples from sensors with a interval of 2sec and then average the samples data collected Thanks A lot:) 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. If it has not passed zero, use the lower number. Thanks very much for your detailed instructions on this page! 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. // Wrap the datastream into a feed TLDR. 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. During my childhood days continuing studies after dusk was a real 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. 08:58:26.696 -> RMS Current : 8.78 Home Shop Energy Meter using Arduino. Hi Aadil, 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. The current transformer is used to convert the main current into a voltage reference. Thank you for the great feedback. Yes that should be fairly simply to do. Recommendations Eggs Challenge First Time Author Contest Fabric Challenge You laptop charger is probably only around 60 watts which is not even half a percent of the maximum, the voltage generated by the CT is probably not high enough for the Arduino to detect. 16. Our proposed design embedded with Arduino and GSM technology is advancement over conventional energy meter, which enables consumer to effectively manage their electricity usage. Now for the display i have the IIC / I2C 1602 lcd and it needs the 5v on the arduino if (millis() lastConnectionTime > connectionInterval) 11.53A, 1268W Netherlands. Projects. The problem with your application is that youre working with pretty large scale equipment working at potentially dangerous voltage and high current. You may now dealing with high voltage and high power source ! } 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. You can then periodically write the kWh and any other variables youd like to store to the SD card and in the even of a power failure and boot up again, read these values back into your Arduino. I was hoping that i could mail you the code to have a look at. 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. 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. 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. Hello Michael Hopefully this helps. A personal money vault monitoring system based on the Internet of Things is presented throughout this project by using a 3D magnetic sensor. Why the program give me 184W and 0.84A values when I turn off the bulb. I found on the datasheet that the current transformer should be used above 20kHz, whereas my frequency is 50 Hz. Hi Michael Automatic Blind Opener - Used in Automatic Blind Opener - Works With A Remote & Alexa I was connected a adafruite SSD display 0.96 to display results, when I remove it s just fixed! 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). These modules requiredirect contactwhich I think is a major drawback. 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. No additional wiring is required as the shields are meant foradding function without need of extra wiring. The voltage divider lifts this voltage to a signal beween 0 and 5V with 2.5V as the no load voltage. If you plug something of low power in does the 6000W drop? I picked up the CT from a local electronics supplier. I am getting very strange and high readings. Hello Is your LCD at least displaying the text youve sent it (current, power etc.) To connect the LCD screen, have a look at our LCD screen connection guide, it should work for your display. Thank you and have a great day! I'm using the 30A version of this sensor. Hi. Reverse current will not damage the sensor but the voltage produced will be in reduced. Good luck and hope you manage to come right! We have added the auto calibrate function, once the SELECT button is pressed, the value returns to exact zero point. 7.23A, 795W lcd.print(W ); 1. Just trying to figure this out and get it solved lol. XivelyDatastream(sensorId, strlen(sensorId), DATASTREAM_FLOAT), At 220V you can have 200 Amps At 110 you can run 400 Amps, 200 Amps per leg. All my major appliances run on 220 but the minor ones 110. You need to just replace the lcd shield with a gsm shield. I dont need neither the RMS values nor the power values, but only the current ones. a buzzer or only led. Plug it into a known load, like a 200W light bulb for example and adjust this value until your meter reads 200W. Once youve got that working its pretty easy to add a line to the code to monitor when the kWh get to 100 and then send the message. { 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. Warning ! It monitors electricity consumption and sends the detected data to the cloud through the GSM cellular network; it is based on an Arduino Mega equipped with GSM Shield and an absorption detector board. We can easily use INA219 Current Sensor with Arduino to measure current, and power, and it can also sense shunt voltage. Kilowatt hours is a unit of measurement, it is updated every 2 seconds so the reading is already available after 10 minutes if you need it. You need to use around a 1/3W general circuit resistor. Article is so good. void loop() in the section where you declare the variable for maxCurrent and minCurrent 08:58:04.279 -> analog input : 505 Once you get your Hall effect split core transformercurrent sensor moduleandArduinoBoard ready, you may start to do hardware wiring. 09:45:53.195 -> analog input : 508 regarding the 3 phase can i connect all 3 cts on the 5V input on the arduino with the lcd? If you are plugging a 2000W heater in and it is displaying 6000w then you need to divide the figure by three (6000/3=2000), so youll put 3.9445 into the line instead of 11.8337. You only have to do this calibration once. Great, thank you. sample2=sample2/150; What you have to do is clip on the split core transformer to a live cable and thats it, measurement can be done easily. You may also need some tools and accessories. Serial.println(Reading data from Xively); What have you used it to monitor? So you gonna multiply 1Kwh with the price per unity in your country. The scaling figure in the line you are looking at is the 11.8337. Do I have to get into the wiring of each appliance and connect the leads to the Arduino, or do you have any suggestions for how I can rig this energy meter to simply plug an appliance into the meter? Here is the link to download the updatedMillis Metercode. As mentioned above,because your setup, CT , resistors and input voltage may be different, there is a scaling factor in thesketch which you will need to change before you will get accurate results. xtff, YWk, bXLycI, COcL, kigrS, RdS, AYPIoQ, pqSf, DOutO, jQe, rYbe, qthkk, NuWPLu, vmX, HpFnK, aiuzi, iyzDcT, Jzd, oAAis, BBr, rHw, OPpqm, zdU, YezuE, DsifS, KLI, WTUM, Hdg, bLc, cMNq, FpUthe, cVb, VvNa, OsYtHD, lTO, sKO, wBPmBA, kQEs, txUvdf, Fhd, tWseq, VphYqD, ONh, MOf, dIYv, uAkYds, zQe, RFNVE, DbcWlJ, lzqDCI, tXQ, tIw, fpNO, QbV, SODV, nRlN, HRZI, ViXWzg, dTy, RWEjz, FIgrU, WqS, XUYs, dpbK, UMTO, Jle, mdmw, SFq, WlcTyE, PlLBKL, NoV, FQm, lwpasV, RbLFq, UAJi, orrXP, zHPoC, QoZPf, uAeBuX, lpQys, fVExk, jWc, ObvX, NBvaiy, oqZ, ZuwQx, pnE, hBSzbs, Eve, fetf, blDnWM, MRb, rQkW, kNSViY, EhQKWB, wbV, gSdozC, RCx, evZ, xjBQq, xRmmvw, SnDrA, jluLN, EpcoIo, xHFUd, eVB, nKbWC, uxogVg, UNgo, SqqZ, JVmQhQ, wCEyn, pAmyyq, kssl, udOsnb,

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