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esp8266.ino
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esp8266.ino
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/*
* AskSensors IoT Platform.
* Description: Soil moisture monitoring using ESP8266 and the AskSensors IoT cloud.
* Author: https://asksensors.com, 2018 - 2019
* github: https://github.com/asksensors/AskSensors-ESP8266-Moisture
*/
#include <Arduino.h>
#include <ESP8266WiFi.h>
#include <ESP8266WiFiMulti.h>
#include <ESP8266HTTPClient.h>
// user config: TODO
#define MOISTURE_THRESHOLD 55 // moisture alert threshold
const char* wifi_ssid = "Hackathon"; // SSID
const char* wifi_password = "h8ck3xp0"; // WIFI
const char* apiKeyIn = "1mzDADjAOH2cW7eifUHSTWLPwh7HdLR5"; // API KEY IN
const unsigned int writeInterval = 1000; // write interval (in ms)
// ASKSENSORS config.
String host = "http://api.asksensors.com"; // ASKSENSORS API host name
ESP8266WiFiMulti WiFiMulti;
int moisture_Pin= 0; // Soil Moisture Sensor input at Analog PIN A0
int moisture_value= 0, moisture_state = 0xFF;
void setup() {
Serial.begin(115200);
Serial.println("*****************************************************");
Serial.println("********** Program Start : Soil Moisture monitoring using ESP8266 and AskSensors IoT cloud");
Serial.println("Wait for WiFi... ");
Serial.print("********** connecting to WIFI : ");
Serial.println(wifi_ssid);
WiFi.begin(wifi_ssid, wifi_password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("-> WiFi connected");
Serial.println("-> IP address: ");
Serial.println(WiFi.localIP());
}
void loop() {
Serial.print("MOISTURE LEVEL : ");
moisture_value= analogRead(moisture_Pin);
Serial.println(moisture_value);
if(moisture_value < 512) moisture_state = 0;
else moisture_state = 1;
// wait for WiFi connection
if (WiFi.status() == WL_CONNECTED){
HTTPClient http;
Serial.print("[HTTP] begin...\n");
// Create a URL for the request
String url = "";
url += host;
url += "/write/";
url += apiKeyIn;
url += "?module1=";
url += moisture_value;
url += "&module2=";
url += moisture_state;
Serial.print("********** requesting URL: ");
Serial.println(url);
http.begin(url); //HTTP
Serial.println("> Soil moisture level and state were sent to ASKSENSORS");
Serial.print("[HTTP] GET...\n");
// start connection and send HTTP header
int httpCode = http.GET();
// httpCode will be negative on error
if(httpCode > 0) {
// HTTP header has been send and Server response header has been handled
Serial.printf("[HTTP] GET... code: %d\n", httpCode);
// file found at server
if(httpCode == HTTP_CODE_OK) {
String payload = http.getString();
Serial.println(payload);
}
} else {
Serial.printf("[HTTP] GET... failed, error: %s\n", http.errorToString(httpCode).c_str());
}
http.end();
Serial.println("********** End ");
Serial.println("*****************************************************");
}
delay(writeInterval);
}