Introduction: ESP8266, BMP280, MQTT Weather Station
This will guide you trough making a simple weather station with good accuracy.
Here we use a ESP8266 WIFI development board to connect the sensor to the internet to save the data. A lot of flavorous exist and will work and I will use the one I have at home: Homefixer ESP8266
There are many different sensors, but according to http://www.kandrsmith.org/RJS/Misc/Hygrometers/calib_many.html the BME280 delivers the best results out of common low-cost hygrometers. (Due to the seller sending me the wrong part, this guide will be using BMP280 but the steps are similar.
The sending of data will be trough MQTT.
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Step 1: Connection
First we need to connect the BMP280 to the ESP8266.
Connect it like this:
BME280 | ESP8266(NodeMCU) VCC | 3.3V GND | GND SCL | GPIO2(D4) SDA | GPIO0(D3)
Step 2: Install the Software
You can also follow this guide: https://www.letscontrolit.com/wiki/index.php/Tuto...
- Download ESPEasy: https://www.letscontrolit.com/downloads/ESPEasy_R...
- Run flash.cmd
- Answer the questions: Comport can be found in the Devicemanager, Flash Size depends on module: my module is 4096, Build: 120 or newer
- Power off/on or reset the module
- Follow this guide to set up WiFi: https://www.letscontrolit.com/wiki/index.php/Easy...
Step 3: Set Up BMP280
- Connect to the modules website as showed in the wifi setup
- Change i2c ports to SDA=GPIO0 and SCL= GPIO2 or as you connected it
- Add the BMP280 under devices, remember to set IDX to non-zero value
Step 4: Set Up MQTT
Under the config tab you can set the MQTT broker settings. I'm using openHAB protocol after recommendation from here: https://diyprojects.io/esp-easy-mqtt-node-red-bi-...
Temperature will now be published under:
I'm using node-red to display it as shown in the last picture.
Now the weather station is done hurray