Solarpower at AISVN

Collect data from solar panel and wind generator at AISVN - project for IB Physics. Here the battery voltage over the first week:

Pictures for solarpower

We collected some data over time:

Setup Phu My Hung

This setup collected data from 2020 to December 2023. Then IFTT deactivated the webhook functionality to process signals into a Google sheet. Work will continue.

Setup AISVN

Code

// Solarmeter first attempt (all Serial.print removed), inspired by 
// https://randomnerdtutorials.com/esp32-esp8266-publish-sensor-readings-to-google-sheets/
 
#include <WiFi.h>
#include <Wire.h>

const char* ssid     = "REPLACE_WITH_YOUR_SSID";
const char* password = "REPLACE_WITH_YOUR_PASSWORD";
const char* resource = "/trigger/value/with/key/place-here";
const char* server = "maker.ifttt.com";

uint64_t uS_TO_S_FACTOR = 1000000;  // Conversion factor for micro seconds to seconds
uint64_t TIME_TO_SLEEP = 120;
int adcValue = 0;

void setup() {
  delay(1000);
  initWifi();
  makeIFTTTRequest();
  esp_sleep_enable_timer_wakeup(TIME_TO_SLEEP * uS_TO_S_FACTOR);    
  esp_deep_sleep_start(); // start deep sleep for 120 seconds (2 minutes)
}

void loop() {  // sleeping so wont get here
}

void initWifi() {  // Establish a Wi-Fi connection with your router
  WiFi.begin(ssid, password);  
  int timeout = 10 * 4; // 10 seconds
  while(WiFi.status() != WL_CONNECTED  && (timeout-- > 0)) {
    delay(250);
  }
}

void makeIFTTTRequest() {  // Make an HTTP request to the IFTTT web service
  WiFiClient client;
  int retries = 5;

  // raw and converted voltage reading
  adcValue = analogRead( 34 );
  String jsonObject = String("{\"value1\":\"") + adcValue + "\",\"value2\":\"" 
    + (adcValue * 2.4)   + "\",\"value3\":\"" + millis() + "\"}";
  
  client.println(String("POST ") + resource + " HTTP/1.1");
  client.println(String("Host: ") + server); 
  client.println("Connection: close\r\nContent-Type: application/json");
  client.print("Content-Length: ");
  client.println(jsonObject.length());
  client.println();
  client.println(jsonObject);
        
  int timeout = 5 * 10; // 5 seconds             
  while(!!!client.available() && (timeout-- > 0)){
    delay(100);
  }
  client.stop(); 
}

History

This repository was created in May 25, 2020. Data collection worked until the end of 2020. The solar power for the ESP32 to collect and submit data finally gave in.