#define AIO_USERNAME "sanu7210" Serial.println(" Amps"); WiFiClient client; So, Arduino will read the current sensor value through analog pin and send it to the Wi-Fi module ESP12 using Serial communication. float P = V * I; Serial.write(watt); bill.publish(bill_amount)) { Hey guys, I have the same problem. watt[i++]='\0'; delay(5000); // wait 5 seconds In setup function, define baud rate of 115200 to communicate with NodeMCU. Make the connections as shown in the circuit above. Inside this function, we are taking value for 1 second, in that 1 second, we are going to read the value from the sensor, then we are going to calculate the maximum value and the minimum value. Serial.println("OK! Measuring current especially AC current is always a tough task due to the noise coupled with it improper isolation problem etc. when you have doubts use the calculators, https://circuitdigest.com/calculators/voltage-divider-calculator, Submitted by adi on Thu, 08/23/2018 - 12:37. i have a 2.2k resistor instead of 2k.when i kept the value of r1=1k and r2=2.2k it gave me a vout of 3.4375 as the input voltage was 5v.and in the above circuit description the node mcu takes upto 3.3v.so is it safe if i use the resistor combination i have for creating voltage divider? Today technology has become a necessity How to Building Secure Big Data Platform? If you take the difference between those two lines, you will get the (Vpp) voltage peakto -peakvalue. Now, we are done with web integration. float result; Now to add a block, click onPlus signon the top right corner of the screen and click on the first option. I directly soldered the wire between the NodeMCU and ACS712 sensor but you can also use a breadboard and connecting wires. In subscription, give friendly name and topic. Serial.println("MQTT_Already_connected"); delay(10000); Anybody who have done this project please share the sketch for same. double Irms = 0; Serial.print(""); if (! Here we are building an IoT based Project of Energy Meter. } Now, select your feeds which we created previously and click on Next step. In this architecture, the first thing is the connectivity of the smart meters with the cloud. 0p`3`:8O"B c5
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V,Wf-++4i6*9P${U(2TL_UFh@[H=g+r_3W32X"Fc~e2OhVGP/398[ pmRd({ Serial.println("Failed"); My setup looks like this below when ready. void loop() { delay(2000); } if (! Serial.println("Connected"); int8_t ret; // Stop if already connected. WiFiClient client; Along with the graph, the value is also printed on MQTT and it is compared with the serial monitor as shown below. Here we are using AWS IoT core as the IoT hub, which is connecting to each device. the others version seem me complicated. Use of smart meters is Find out more about How your Enterprise This part of the coding defines the Adafruit server which is the link of the website itself along with Adafruit server port, your account username and your AIO KEY. We have used NodeMCU with ACS712 Current Sensor, the current sensor will measure the current consumed by our AC load and the NodeMCU will measure this current, calculate the power (assuming the voltage is constant) and send the power value to a cloud platform like Adafruit IO. WhatsApp me @ +923339078239 or DM me @yebikkgayeehaigormint on Instagram. /*record the menimum sensor value*/ Thanks. Then we will be printing this current value on the serial monitor of Arduino IDE as well as on the MQTT IoT Platform. % Unable to get correct data at NodeMCU side, it is always showing 0.0. First, we will include all the library for ESP8266 and Adafruit MQTT. This piece of code is publishing power values to the Power feed. please contact me olej_1118@yahoo.com. Submitted by Gulain on Tue, 08/28/2018 - 17:16. 4 0 obj #include "Adafruit_MQTT.h" for Arduino Uno: Complete Arduino code is given at the end of this tutorial. Submitted by ATUL MISHRA on Fri, 02/28/2020 - 18:12. First, we will make a feed inAdaFruit IO. }, if (bill_amount==4){ I hope you understood the tutorial and built something useful. Voltage = getVPP(); Complete Code for IoT Energy Meter can be found at the end of this article but we need to download some library for this code. return; If you need any help I will try to help as much as I can. Now the last and most important part is running the Machine learning model on the incoming results and getting predictive results. A window will pop up with your Adafruit IO AIO Key. endobj According to the principle, when a current-carrying conductor is placed in the magnetic field, a voltage is generated across its edges perpendicular to the direction of both current and the magnetic field. A unified, secure Big Data platform performs Data Integration and Migration Introduction to Smart Meters In the Energy Upgrade solution, IoT is playing a significant role. /*record the menimum sensor value*/ endobj result = ((maxValue - minValue) * 5) / 1024.0; Feed stores the data sent by IFTTT. SS&|G6{Qyxd2C2qAF&'nhJ{w]M3
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:vm{1r8+I`@ljzaXKaqz` 0RD-B\1 5w`XbRp40X?3TM_%xTVpl#}iZk As you can see the NodeMCU will be powered through the USB port using a 5V mobile charger and the AC load will be connected to the 220V AC mains through our ACS712 current sensor. delay(100); //allows all serial sent to be received together if (retries == 0) { #define WLAN_PASS "nilanjan9563136731" // Create an ESP8266 WiFiClient class to connect to the MQTT server. Step 2: On My Applets, Click onNew Applet. delay(1000); while ((millis() - start_time) < 1000) //sample for 1 Sec Exif II* Ducky. Under the loop, you can see we are going to convert peak voltage to RMS value using the formulae explained above. while (WiFi.status() != WL_CONNECTED) <> With a perfectly blended team of Engineers and Journalists, we demystify electronics and its related technologies by providing high value content to our readers. We all know about Electricity energy meters which are installed in everyones house or offices to measure the electricity consumption. double getVPP() Step 4: Give name and description to your feed and click on Create. Serial.println(F("Failed")); Web page addresses and email addresses turn into links automatically. Serial.println("Retrying MQTT connection in 5 seconds"); ! (L1OJXxImm^U>cG'lG=m{S xD zDp8XG]`VU +&BK8 aV*Y7w[]h41|ZpG\ At this stage, AWS Sagemaker is using a trusted data lake for the model training. delay(5000); } char watt[5]; //WiFiClientSecure client; delay(500); can you tell me the wifi range for esp8266 nodemcu?? // basically die and wait for WDT to reset me MQTT_connect(); int i=0; <>/Border[0 0 0]/P 3 0 R>> These values were calculated based on the information given in the Datasheet of ACS712. You can also use simple text box to display energy. photocell.publish(Irms)) MQTT_connect(); Step 10: Your recipe is ready. Based on these anomalies, the message has been sent to AWS SNS queue. Solutions for 5G, smart home, industrial, automotive, healthcare, and agricultural IoT applications, TRACO Power's 180 W power supplies are offered in ultra-compact open-frame and enclosed packages, MEAN WELL's sine wave inverters offer industrial-grade high reliability, safety, and quality, Bourns' hybrid protection component combines both MOV and GDT technologies into a single component. 8. At last of every month, many of us get worried about the high electricity bill and we have to look at the energy meter once in a while. #define AIO_SERVERPORT 1883 //use 8883 for SSL %PDF-1.6 So follow the same steps. uint32_t start_time = millis(); IP22 rated medical & home-healthcare 18/24/36W AC-DC adaptors with interchangeable AC plugs. Calculate bill amount by multiplying power (in Wh) with energy tariff and divide it by 1000 to make power in KWh. delay(10); If you go through the handmade diagram, I have prepared for you all, you can see that there are two lines, the top line which is the name I have given (Vp) indicates the maximum value of the voltage and bottom is (Vp) which indicates the minimum value of the voltage. Circuit diagram for IoT based Energy Meter using Arduino and NodeMCU is given above, connect ESP12 as below: 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. last_time = current_time; "); To sign up, go to Adafruit IOs site https://io.adafruit.comand click on Get started for Free on the top right of the screen. While integrating real-time data with the dashboard, we are using the same transformed result which is being used by AWS Lambda. if(Serial.available() > 0 ){ const int sensorIn = A0; Then we have a variable millivolt per Ampere sensitivity which has to be mentioned in the coding, this is different for all the variants of ACS712 sensor (185mV for 5Amp module, 100mV for 10A, 66mv for 20 & 30 Amp module). After this a new window will open where you need to input: Name In name option, write a short descriptive name of your feed. This is how you can create a Smart Electricity Energy Meter, which can be not only monitored from anywhere in the world but also trigger Email when you have high Electricity consumption. After this, the architecture is divided into four parts: Alerting and Notification, Real-time Results, Analytical dashboard, Predictive results on the dashboard. #include
A low-cost, Arduino UNO compatible shield board that can be used to easily interface a variety of sensors with the PSoC 6 MCU platform. But, with the help of this ACS712 module which was engineered by Allegro thing have become a lot easier. Description -A long-form description of your data. For this we need AdaFruit MQTT library which can be downloaded from this link. Creating a Dashboard is the same as Feed. So Lets Get started. 12 0 obj delay(5000); float watt1; float V = 230; <>/Border[0 0 0]/P 3 0 R>> Go to examples -> AdaFruit MQTT library -> mqtt_esp8266. Once you have made the connection and uploaded the code, you should see the power reading on the AdafruitIO console. Use voltage divider circuit at receiver pin of NodeMCU so that receiver pin can get upto 3.3 Voltage level. After some research, I decided to build a simple one by using a current sensor with NodeMCU and send the measured current valuesto theIoT Cloud Platform. 11 0 obj int minValue = 1024; // store min value here readValue = analogRead(sensorIn); A typically ACS712 Current sensor is shown below. BoschBMP581 Barometric Pressure Sensor features a wide 300hPa to 1250hPa measurement range and absolute accuracy of 30Pa. Change First argument if you are using 20Amp or 5 Amp variant. Create an instance to use ACS712-30Amp at PIN A0. Adafruit_MQTT_Publish bill = Adafruit_MQTT_Publish(&mqtt, AIO_USERNAME "/feeds/bill"); A visual info-graphic circuit diagram is also given below for your convenience. Another popular method for Current sensing is using a Current Transformer (CT). hey man, I have the same problem. But what if we can monitor our electricity uses from anywhere in the world and get an SMS/E-mail when your energy consumption reaches to a threshold value. mqtt.disconnect(); } I will really appreciate your help. In this way, you can build your IoT-based energy meter that can be monitored from anywhere in the world. Then click on Actions, you will see some options from them click on Create a New Feed. On top of AWS S3, we are using AWS Athena for interactive SQL queries on the AWS S3 bucket. Then we return to the main function. } You will see the Power consumption and electricity Bill is updating. After that, we convert the voltage to current, for that we are dividing the Vrms value by the millivolt per amp value of the current sensor (Im using 30 Amp module so it is 66 mVperamp) and multiply by 1000 so that we get it into the Amp not in milli Amps. 4. void MQTT_connect(); Step 9:Your Power feed is successfully created. 6. I don't find the same version that is used in the tutoriel. It is similar to how clamp meter works. 1 0 obj delay(5000); // wait 5 seconds Have you been able to fix it? }, if (! if (mqtt.connected()) { Now after this, you need to create a feed. AWS IoT core is sending results to the AWS Kinesis Firehose. 7. }, #include }, uint8_t retries = 3; Direct sensing method uses Ohms law to measure the voltage drop occurring in a wire when current flows through it, but ACS712 uses indirect current sensing method (which is measured by calculating magnetic field by applying either Faradays Law or Amperes Law), hence there will be no external load on the current-carrying wire and no direct contact is needed. To monitor our energy uses over the internet, we have to use MQTT broker. You can download it through the library manager or can download it from the below link and add using the import library option on Arduino IDE. Submitted by Satish on Sun, 07/29/2018 - 22:28, Thanks for the great content, can you please tell the value of resistor, Submitted by aditya on Mon, 08/06/2018 - 21:50. do we need a voltage regulator for the circuit? This module works on the principle of Hall-effect, which was discovered by Dr. Edwin Hall. Step 3:-Click on Actions and Create a New Dashboard. Since we powered up the module from the ESP 3V output pin the ACS712 module output offset voltage is 1.5 volt (1500 mv) when there is no current flowing. Step 5: Click onKeybutton and note down the AIO Keys, we will use this key in our code. The Vout pin has an offset voltage of 2500mV, meaning when there is no current flowing through the wire then the output voltage will be 2500mV and when current flowing is positive, the voltage will be greater than 2500mV and when the current flowing is negative, the voltage will be less than 2500mV. Hammond's rugged enclosures available in twenty sizes, three colors, and with accessory inner panels. This can be done with the help of the Adafruit MQTT IoT Platform which is free and doesnt require a subscription. All Rights Reserved. endobj In sign up window, fill your details likeyour name, mail id, username, etc. // Ensure the connection to the MQTT server is alive (this will make the first dtostrf(Wh, 4, 2, watt); This sensor is located at the surface of the IC on a bold copper conducting path from phase input-output. When everything is done, its time to open Account on the Adafruit IO IoT platform and connect our circuit with the Adafruit server to monitor energy meter readings live. while ((ret = mqtt.connect()) != 0) { // connect will return 0 for connected We will take help of IFTTT platform to link our Wi-Fi to SMS/E-mail notifications. Download Now and Get Access to the detailed Use Case. uint8_t retries = 3; Android App for Monitoring Electricity Consumption, AMF Series 18/24/36 W Medical AC-DC Adaptors, TPP 180 and TPI 180 Medical and Industrial AC/DC Power Supplies, NTS/NTU Series Reliable, Safe, and Durable DC-AC Pure Sine Wave Inverters, IsoMOV Series Hybrid Protection Component. ACS712 sensor(ACS712_30A, A0); <>stream while (1); endobj And for the model inference, AWS Fargate is being used, which is calculating the prediction results and storing it into AWS DynamoDB. Submitted by adi on Tue, 09/04/2018 - 17:42. the values are not getting updated on adafruit dashboard.i also checked it in the mqtt android app and it does no get updated.it just shows N/A. Step 1: Login toIFTTTwith your credentials. i am working on this project but have problem, UNO gives me good values, but nodemcu cant show the same values, i dont know why, Submitted by Cindy on Tue, 01/26/2021 - 19:57. In this project we make a Smart Electricity Energy meter using Arduino and ESP8266 Wi-Fi module which can not only sends you a SMS/Email of your electricity Bill but also you can monitor the energy uses anytime and from anywhere in the world. Adafruit SHT40 Temperature and Humidity Sensor Board integrates a fourth-generation sensorand is designed with a true I2C interface. In setup function, we connect Wi-Fi module to Wi-fi access point. char watt[5]; If I follow this it will work or not?!??!?!!! retries--; We will discuss more on ACS712 working later in this article. For quite some time, I have been trying to find out ways to build a simple yet accurate way to measure and monitor the power usages from anywhere, be it at home office or on the go. So, its basically in that 1 second that we are going to store what is the minimum value of the voltage and what is the maximum value of the voltage and the result is difference between the maximum value of the voltage and minimum value of the voltage and multiplied by 5 and divided by 1024 all is used for converting to current and it is related to calibration factor. ESP has an onboard voltage divider circuit internally, so we are giving direct input from ACS712 output to the A0 input pin. Submitted by vignesh on Sat, 12/21/2019 - 00:49. hello sir, this is vignesh and i am the regular visitor of yourwebsite and i love to make new projects and to learn new things from them, so basically i created this iot based power meter project and almost completed it but now stuck on adafruit io feed not working , mqqtt dashboard app showing error msg and ifttt ,it wouldbe very helpful of youif youjust tell me the steps of adafruit io and dashboard ,my mail id is rvighanesh@gmail.com, as i am new with iot and adafruit io feeds so i am having least knowlege about it ,so i look forward for ur help tahnk you.. void setup() { while (WiFi.status() != WL_CONNECTED) { To make output of current sensor 3.3V instead of 5V, we cannot use voltage divider circuit between Current sensor and analog pin of NodeMCU because as we discussed above about the current sensor that at 2.5Volts output, current is 0Amp. Here we have used a Current Sensor ACS712 to measure the energy consumption, we will discuss about it shortly. We define the SSID and Password for your Wi-Fi, from which you want to connect your ESp-12e. Could this handle voltages of 400v with 5A, there's 3 phases and a neutral, I do not need to monitor all 3, just one will do When an electron flows through a wire or path, it creates a magnetic field in its surroundings. 13 0 obj After these transformations, AWS Lambda Function is used for further data validation and filtering to identify an anomaly. } We have used this sensor to make Digital Ammeter Circuit using PIC Microcontroller and ACS712. } Copy this key you'll need it later in your python code. Although it is very simple, you should follow the graphical representation for a better understanding and make sure the connections are correct.
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