esp01-wip-energymonitor.ino

/*
  Example code to get a MCP3*08 running with an ESP8266
  for DiY energy monitoring solutions
*/
#include <Arduino.h>
#include <ESP8266WiFi.h>
#include "MCP3208.h"

const char* ssid = "...";
const char* host = "...";
const char* password = "...";
const int   httpPort = 80;
float adc0 = 0;

// bitbanging all the way
// reusing TX RX pins as GPIO
#define SELPIN 0    //CS
#define DATAOUT 1   //MOSI
#define DATAIN 3    //MISO
#define SPICLOCK 2  //SCLK

MCP3208 adc(SPICLOCK, DATAOUT, DATAIN, SELPIN);

// ADC read time "delays"
unsigned long adcTime;
unsigned long adcDelay = 1000;

// IOT send time "delays"
unsigned long iotTime;
unsigned long iotDelay = 2000;

// stub function for resetting ADC read time delay
void setAdcDelay() {
  adcTime = millis() + adcDelay;
}

// stub function for resetting HTTP send delay
void setIoTDelay() {
  iotTime = millis() + iotDelay;
}

void setup() {
  //Serial.begin(115200);
  //Serial.println('Setup complete.');

  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
  }

  setAdcDelay();
  setIoTDelay();

}

void loop() {

  if (millis() >= adcTime) {
    adc0 = adc.readADC(0);
    //adc0 = 1.45;
    setAdcDelay();
  }


  if (millis() >= iotTime) {

    // Use WiFiClient class to create TCP connections
    WiFiClient client;
    const int httpPort = 80;
    if (!client.connect(host, httpPort)) {
      Serial.println("connection failed");
      return;
    }


    // We now create a URI for the request
    // this is something like "GET /iot?id=esp01&key=adc&value=2197.00"
    String url = "/iot";
    url += "?id=esp01";
    url += "&key=adc";
    url += "&value=";
    url += adc0;

    // This will send the request to the server
    client.print(String("GET ") + url + " HTTP/1.1\r\n" +
                 "Host: " + host + "\r\n" +
                 "Connection: close\r\n\r\n");
    int timeout = millis() + 5000;
    while (client.available() == 0) {
      if (timeout - millis() < 0) {
        client.stop();
        return;
      }
    }
    setIoTDelay();
  }
}