CCS881_OLED_Ambient.ino

//
//  Sensor
#include "Adafruit_CCS811.h"

Adafruit_CCS811 ccs;

//
//  WiFi
#include <WiFi.h>
#include <WiFiClient.h>
#include <Ambient.h>

char *ssid;
const char *ssid1   = "<ssid1>";
const char *pass1   = "<pass1>";
const char *ssid2   = "<ssid2>";
const char *pass2   = "<pass2>";


WiFiClient client;
Ambient ambient;

unsigned int channelId = <ch number>;
const char* writeKey   = "<ambient write api key>";


void connect() {
  Serial.print("WiFi Connectiong");
  ssid = (char *)ssid1;
  WiFi.begin(ssid, pass1);
  int cnt = 0;
  while (WiFi.status() != WL_CONNECTED) {
    Serial.print(".");
    delay(500); //  0.5秒
    if (++cnt == 10) {
      WiFi.disconnect();
      Serial.print("|");
      delay(500);
      ssid = (char *)ssid2;
      WiFi.begin(ssid, pass2);
    }
    if (cnt > 20) {
      break;
    }
  }
  Serial.println("");
}



//
//  時間
#include <Time.h>
#include <TimeLib.h>


//
//  OLED
//
#include "SSD1306.h"

SSD1306   display(0x3c, 21, 22);

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


  //
  //  OLED
  display.init();
  display.flipScreenVertically();
  display.displayOn();
  display.clear();
  display.setFont(ArialMT_Plain_16);
  display.setTextAlignment(TEXT_ALIGN_RIGHT);

  display.drawString(0,  32, "Hello");
  display.display();

  delay(100);

  //
  //  CCS881
  //
  int ccsReady = true;
  //  設定パラメータをセット
  if (!ccs.begin()) {
    Serial.println("Failed to start sensor! Please check your wiring.");
    ccsReady = false;
  }

  //
  //  WiFi
  //
  //  接続＆接続確認
  connect();
  ambient.begin(channelId, writeKey, &client);
  
  //
  //  show status
  showStatus(ccsReady);
  display.display();
}




//
//  メインループ
//

int prevMinute = minute();

void loop() {
  int ccsReady = false;

  if (ccs.available()) {
    float temp = ccs.calculateTemperature();
    if (!ccs.readData()) {
      ccsReady = true;
      //
      //  文字列へ変換
      char tBuf[10], cBuf[10], vBuf[10];
      dtostrf(temp,          7, 2, tBuf);
      dtostrf(ccs.geteCO2(), 7, 2, cBuf);
      dtostrf(ccs.getTVOC(), 7, 2, vBuf);

      //  シリアルに出力
      Serial.print("Temperature: ");
      Serial.print(tBuf);
      Serial.println(" degrees C");

      Serial.print("        CO2: ");
      Serial.print(cBuf);
      Serial.println(" ppm");

      Serial.print("       TVOC: ");
      Serial.print(vBuf);
      Serial.println(" ppb");

      Serial.println();

      //
      //  OLEDへ表示
      delay(10);
      display.clear();

      display.setFont(ArialMT_Plain_10);
      display.setTextAlignment(TEXT_ALIGN_LEFT);
      display.drawString(16, 16, "Sen temp");
      display.drawString(16, 32, "Value1");
      display.drawString(16, 48, "Value2");

      display.setFont(ArialMT_Plain_16);
      display.setTextAlignment(TEXT_ALIGN_RIGHT);

      display.drawString(127, 16, tBuf);
      display.drawString(127, 32, cBuf);
      display.drawString(127, 48, vBuf);



      //  1分ごとにThingSpeakへ送出
      if (prevMinute != minute()) {
        if (WiFi.status() == WL_CONNECTED) {
          ambient.set(1, tBuf);
          ambient.set(2, cBuf);
          ambient.set(3, vBuf);
          ambient.send();
        } else {
          connect();
        }
      }
    } else {
      Serial.println("ccs read fail");
    }

    showStatus(ccsReady);
    display.display();
  } else {
    Serial.println("css not ready");
  }


  delay(200);
}


void showStatus(int inCssReady) {
  char buf[20];

  display.setFont(ArialMT_Plain_10);
  display.setTextAlignment(TEXT_ALIGN_LEFT);

  sprintf(buf, "%s:%s", ssid, WiFi.status() == WL_CONNECTED ? "OK" : "NG");
  display.drawString( 0, 0, buf);

  display.setTextAlignment(TEXT_ALIGN_RIGHT);
  sprintf(buf, "CSS:%s", inCssReady == true ? "OK" : "NG");
  display.drawString(127, 0, buf);
}