1.9 KiB
1.9 KiB
Homeostasis
Temperature and humidity sensor that communicates via MQTT. The project is implemented using a Wemos D1 mini ESP32 board with a DHT22 shield.
This specific shield needs to have the data line connected to a pin different to D4, as explained in this blog post.
Pinout of the board
Dependencies
Configuration
In the data directory, there is a JSON file that allows the configuration of multiple values:
- ssid: WiFi network name
- psk: WiFi password
- mqtt_host: IP address of the MQTT broker
- mqtt_user: username that has write access on the MQTT broker
- mqtt_password: password for the user that has write access on the MQTT broker
- mqtt_port: port used by the MQTT broker
- mqtt_topic: channel name
- device_id: unique identifier of the sensor
- sleep_time: time interval between each data transmission
- connection_attempts: maximum connection attemps to the network
The file needs to be renamed to config.json
Deployment
The software uses the Arduino framework and the development environment of PlatformIO, which offers better tooling than the official Arduino IDE.
Generate compilation database
pio run -t compiledbUpload the configuration file to the board
pio run -t uploadfsCompile the project
pio run -t compileUpload firmware
pio run -t upload