Michal Kren
Published © MIT

Simple Weather Station with Amazing Web Monitoring

Do you want to check from anywhere the temperature, pressure and humidity? If so, this project will show you how to do it.

IntermediateFull instructions provided1 hour15,688
Simple Weather Station with Amazing Web Monitoring

Things used in this project

Hardware components

NodeMcu ESP8266 V3
×1
NodeMCU ESP8266 Breakout Board
NodeMCU ESP8266 Breakout Board
alternative
×1
BME280 Digital Sensor
×1
SparkFun Atmospheric Sensor Breakout - BME280
SparkFun Atmospheric Sensor Breakout - BME280
alternative
×1

Software apps and online services

Corlysis
InfluxDB
Grafana
Arduino IDE
Arduino IDE

Story

Read more

Schematics

NodeMCU and BME280

Code

NodeMCU + BME280 + Corlysis

Arduino
/***************************************************************************
  This is a library for the BME280 humidity, temperature & pressure sensor
  Designed specifically to work with the Adafruit BME280 Breakout
  ----> http://www.adafruit.com/products/2650
  These sensors use I2C or SPI to communicate, 2 or 4 pins are required
  to interface. The device's I2C address is either 0x76 or 0x77.
  Adafruit invests time and resources providing this open source code,
  please support Adafruit andopen-source hardware by purchasing products
  from Adafruit!
  Written by Limor Fried & Kevin Townsend for Adafruit Industries.
  BSD license, all text above must be included in any redistribution
 ***************************************************************************/

/*
 * Sensor connection:
 * BME280 GND --> NodeMCU GND
 * BME280 3.3V --> NodeMCU 3V3
 * BME280 SDA --> NodeMCU D2
 * BME280 SCL --> NodeMCU D1
 */


#include <Wire.h>

#include <Adafruit_Sensor.h>
#include <Adafruit_BME280.h>
#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>

// Wi-Fi settings
const char* ssid = "YOUR-SSID";
const char* password = "YOUR-PASSWORD";

// Sensor settings
const uint8_t sensor_address = 0x76;

// Corlysis Setting - click to the database to get those info
const char* db_name = "YOUR-DB_NAME";
const char* db_password = "YOUR-DB-PASSWORD";
const unsigned long delayTimeMs = 10000;


Adafruit_BME280 bme;
HTTPClient http;


void setup() {
    Serial.begin(9600);
    Serial.println("NodeMCU + BME280 + Corlysis");

    bool status;
    
    // you can also pass in a Wire library object like &Wire2
    status = bme.begin(sensorAddress);  
    if (!status) {
        Serial.println("Could not find a valid BME280 sensor, check wiring!");
        while (1);
    }
    
    delay(100); // let sensor boot up

    //Wi-Fi connection
    Serial.print("Connecting to the: ");
    Serial.println(ssid);
    WiFi.mode(WIFI_STA);
    WiFi.begin(ssid, password);
    
    while (WiFi.status() != WL_CONNECTED) {
        delay(100);
        Serial.print(".");
    }

    Serial.println();
    Serial.println("WiFi connected.");
    Serial.print("My IP address: ");
    Serial.println(WiFi.localIP());
    
}


void loop() {
    // read data from sensor
    float temperature = bme.readTemperature();
    //temperature = 9.0/5.0 * temperature + 32.0;
    float pressure = bme.readPressure();
    float humidity = bme.readHumidity();

    sendDataToCorlysis(temperature, pressure, humidity);
    
    delay(delayTimeMs);
}


void sendDataToCorlysis(float temperature, float pressure, float humidity) {
    static long counter = 0;
    
    char payloadStr[150];
    sprintf(payloadStr, "bme280_data temperature=%d.%02d,pressure=%d.%02d,humidity=%d.%02d", (int)temperature, (int)abs(temperature*100)%100, 
    (int)pressure, (int)abs(pressure*100)%100, (int)humidity, (int)abs(humidity*100)%100);
    Serial.println(payloadStr);
    
    char corlysisUrl[200];
    sprintf(corlysisUrl, "http://corlysis.com:8087/write?db=%s&u=token&p=%s", dbName, dbPassword);
    http.begin(corlysisUrl);
    //HTTPS variant - check ssh public key fingerprint
    //sprintf(corlysisUrl, "https://corlysis.com:8086/write?db=%s&u=token&p=%s", dbName, dbPassword);
    //http.begin(corlysisUrl, "92:23:13:0D:59:68:58:83:E6:82:98:EB:18:D7:68:B5:C8:90:0D:03");
    
    http.addHeader("Content-Type", "application/x-www-form-urlencoded");  
    int httpCode = http.POST(payloadStr);
    Serial.print("http result:");
    Serial.println(httpCode);
    http.writeToStream(&Serial);
    http.end();

    if(httpCode == 204) {
        counter = 0;
        Serial.println("Data successfully sent.");
    }else{
        if(counter > 10 && httpCode == -1) {
            Serial.println("WiFi: still not connected -> reboot.");
            WiFi.forceSleepBegin(); wdt_reset(); ESP.restart(); while(1)wdt_reset();
        }
        counter++;
        Serial.println("Data were not sent. Check network connection.");
    }
    Serial.println("");  
}

Github

Credits

Michal Kren

Michal Kren

2 projects • 3 followers

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