esp32-weatherstation/src/main.cpp

/*
 * Blink
 * Turns on an LED on for one second,
 * then off for one second, repeatedly.
 */

#include <Arduino.h>
#include <WiFi.h>
#include <WiFiMulti.h>

#include <Wire.h>
#include <SPI.h>

#include <GxEPD2_BW.h>
#include <Fonts/FreeMonoBold9pt7b.h>
#include "bitmaps/Bitmaps128x250.h"

#include <Adafruit_Sensor.h>
#include "Adafruit_BME680.h"

#include "XD0OTA.h"
#include "XD0MQTT.h"

static const char* TAG = "MAIN";

WiFiMulti wifiMulti;
GxEPD2_BW<GxEPD2_213_B72, GxEPD2_213_B72::HEIGHT> display(GxEPD2_213_B72(/*CS=TFT_CS*/ SS, /*DC=*/ TFT_DC, /*RST=*/ TFT_RST, /*BUSY=*/ -1)); // GDEH0213B72
Adafruit_BME680 bme; // I2C (also available: hardware SPI

XD0MQTT mqtt;

void helloWorld()
{
  const char HelloWorld[] = "Hello World!";
  //Serial.println("helloWorld");
  display.setRotation(1);
  display.setFont(&FreeMonoBold9pt7b);
  display.setTextColor(GxEPD_BLACK);
  int16_t tbx, tby; uint16_t tbw, tbh;
  display.getTextBounds(HelloWorld, 0, 0, &tbx, &tby, &tbw, &tbh);
  // center bounding box by transposition of origin:
  uint16_t x = ((display.width() - tbw) / 2) - tbx;
  uint16_t y = ((display.height() - tbh) / 2) - tby;
  display.setFullWindow();
  display.firstPage();
  do
  {
    display.fillScreen(GxEPD_WHITE);
    display.setCursor(x, y);
    display.print(HelloWorld);
  }
  while (display.nextPage());
  //Serial.println("helloWorld done");
}

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

  // initialize LED digital pin as an output.
  pinMode(LED_BUILTIN, OUTPUT);

  display.init(115200);
  helloWorld();
  display.powerOff();

  if (!bme.begin()) {
    ESP_LOGE(TAG, "Could not find a valid BME680 sensor, check wiring!");
  }

  // Set up oversampling and filter initialization
  bme.setTemperatureOversampling(BME680_OS_8X);
  bme.setHumidityOversampling(BME680_OS_2X);
  bme.setPressureOversampling(BME680_OS_4X);
  bme.setIIRFilterSize(BME680_FILTER_SIZE_3);
  bme.setGasHeater(320, 150); // 320*C for 150 ms

  wifiMulti.addAP(WIFI_SSID, WIFI_PASSWD);
  wifiMulti.addAP(WIFI_SSID2, WIFI_PASSWD2);

  Serial.println("Connecting Wifi...");
  if(wifiMulti.run() == WL_CONNECTED) {
    Serial.println("");
    Serial.println("WiFi connected");
    Serial.println("IP address: ");
    Serial.println(WiFi.localIP());
  }

  XD0OTA ota("esp32-weatherstation");
  ota.update();

  mqtt.begin();
}

void loop()
{
  unsigned long endTime = bme.beginReading();
  if (! bme.performReading()) {
    ESP_LOGE(TAG, "BME680: Failed to perform reading :(");
    return;
  }

  Serial.print("Temperature = "); Serial.print(bme.temperature); Serial.println(" *C");
  display.print("Temperature: "); display.print(bme.temperature); display.println(" *C");

  Serial.print("Pressure = "); Serial.print(bme.pressure / 100.0); Serial.println(" hPa");
  display.print("Pressure: "); display.print(bme.pressure / 100); display.println(" hPa");

  Serial.print("Humidity = "); Serial.print(bme.humidity); Serial.println(" %");
  display.print("Humidity: "); display.print(bme.humidity); display.println(" %");

  Serial.print("Gas = "); Serial.print(bme.gas_resistance / 1000.0); Serial.println(" KOhms");
  display.print("Gas: "); display.print(bme.gas_resistance / 1000.0); display.println(" KOhms");

  if(wifiMulti.run() != WL_CONNECTED) {
    Serial.println("WiFi not connected!");
    delay(1000);
  }

  delay(1000);
}