iot_weather_step3.ino

/**************************************************************************
 read bme280 data and display on ssd1306 
 **************************************************************************/

#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#include <Adafruit_Sensor.h>
#include <Adafruit_BME280.h>

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels

// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
#define OLED_RESET     4 // Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

Adafruit_BME280 bme; // I2C

#include <WiFi.h>

#include <InfluxDbClient.h>
#include <InfluxDbCloud.h>

// Replace with your network credentials
const char* ssid = "xxxxxx";
const char* password = "yyyyyy";

volatile byte revolutions;

// interrupt routine to count revolutions
void IRAM_ATTR isr() {
  revolutions += 1;
}

// InfluxDB v2 server url, e.g. https://eu-central-1-1.aws.cloud2.influxdata.com (Use: InfluxDB UI -> Load Data -> Client Libraries)
#define INFLUXDB_URL "<url>"
// InfluxDB v2 server or cloud API authentication token (Use: InfluxDB UI -> Data -> Tokens -> <select token>)
#define INFLUXDB_TOKEN "<token>"
// InfluxDB v2 organization id (Use: InfluxDB UI -> User -> About -> Common Ids )
#define INFLUXDB_ORG "<org>"
// InfluxDB v2 bucket name (Use: InfluxDB UI ->  Data -> Buckets)
#define INFLUXDB_BUCKET "<bucket>"

#define TZ_INFO "CET-1CEST,M3.5.0,M10.5.0/3"

// InfluxDB client instance with preconfigured InfluxCloud certificate
InfluxDBClient client(INFLUXDB_URL, INFLUXDB_ORG, INFLUXDB_BUCKET, INFLUXDB_TOKEN, InfluxDbCloud2CACert);

/*
// InfluxDB  server url. Don't use localhost, always server name or ip address.
// For InfluxDB 1 e.g. http://192.168.1.48:8086
#define INFLUXDB_URL "http://<ip>:8086"
// InfluxDB v1 database name 
#define INFLUXDB_DB_NAME "<dbname>"
// InfluxDB v1 credentials
#define INFLUXDB_USER "<user>"
#define INFLUXDB_PASSWORD "<password>"
// InfluxDB client instance for InfluxDB 1
InfluxDBClient client(INFLUXDB_URL, INFLUXDB_DB_NAME);
*/

// Data point
Point sensor("weather_data");

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

  // SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3C for 128x64
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); // Don't proceed, loop forever
  }

  unsigned status;

  // default settings
  status = bme.begin(0x76);  
  if (!status) {
        Serial.println("Could not find a valid BME280 sensor, check wiring, address, sensor ID!");
        Serial.print("SensorID was: 0x"); Serial.println(bme.sensorID(),16);
        Serial.print("        ID of 0xFF probably means a bad address, a BMP 180 or BMP 085\n");
        Serial.print("   ID of 0x56-0x58 represents a BMP 280,\n");
        Serial.print("        ID of 0x60 represents a BME 280.\n");
        Serial.print("        ID of 0x61 represents a BME 680.\n");
        while (1) delay(10);
  }

 // Connect to Wi-Fi network with SSID and password
  Serial.print("Connecting to ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  // Print local IP address 
  Serial.println("");
  Serial.println("WiFi connected.");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());

  // Set InfluxDB 1 authentication params
  //client.setConnectionParamsV1(INFLUXDB_URL, INFLUXDB_DB_NAME, INFLUXDB_USER, INFLUXDB_PASSWORD);

  // Add tags
  sensor.addTag("device", "ESP32");

  timeSync(TZ_INFO, "pool.ntp.org", "time.nis.gov");

 // Check server connection
  if (client.validateConnection()) {
    Serial.print("Connected to InfluxDB: ");
    Serial.println(client.getServerUrl());
  } else {
    Serial.print("InfluxDB connection failed: ");
    Serial.println(client.getLastErrorMessage());
  }

  // attach pin 12 to interrupt routine
  pinMode(12, INPUT);
  attachInterrupt(12, isr, FALLING);

}

void loop() {

  display.clearDisplay();

  display.setTextSize(1);             // Normal 1:1 pixel scale
  display.setTextColor(SSD1306_WHITE);        // Draw white text

  display.setCursor(0,0);            
  display.print("Temperatur: ");
  display.setCursor(70,0);
  display.print(bme.readTemperature());
  display.setCursor(100,0);
  display.print(" *C");

  display.setCursor(0,10);            
  display.print("Luftdruck: ");
  display.setCursor(65,10);
  display.print(bme.readPressure() / 100.0F);
  display.setCursor(100,10);
  display.print(" hPa");

  display.setCursor(0,20);            
  display.print("Feuchtigkeit: ");
  display.setCursor(80,20);
  display.print(bme.readHumidity());
  display.setCursor(110,20);
  display.print(" %");

  display.setCursor(0,30);            
  display.print("Wind: ");
  display.setCursor(50,30);
  display.print(revolutions*6*16*0.001885); // revolutions in 10sec to km/h at 16cm diameter
  display.setCursor(80,30);
  display.print(" km/h");

  display.display();

  // Clear fields for reusing the point. Tags will remain untouched
  sensor.clearFields();
  
  // Store measured value into point
  sensor.addField("temp", bme.readTemperature());
  sensor.addField("pressure", bme.readPressure() / 100.0F);
  sensor.addField("humidity", bme.readHumidity());

  // add and reset wind speed counter
  sensor.addField("wind_counter", revolutions);
  revolutions=0;

  // Print what are we exactly writing
  Serial.print("Writing: ");
  Serial.println(sensor.toLineProtocol());

  // Write point
  if (!client.writePoint(sensor)) {
    Serial.print("InfluxDB write failed: ");
    Serial.println(client.getLastErrorMessage());
  }

  // wait 10s
  delay(10000);
  
}