This sketch allows you to connect a BME688 I2C breakout board to a Raspberry Pi Pico W and expose a web server that will serve up an HTML table with the current measurements.
It supports prometheus-style (scrape) metrics collection for inclusion in a timeseries database. It also supports updating a Homebridge instance configured with the homebridge-http-webhooks plugin.
The sketch supports ArduinoOTA, allowing you to update the sketch from the Arduino IDE over WiFi.
If it cannot connect to the wifi SSID configured in the onboard flash or embedded in the secrets.h file, it will create its own wireless network and serve the metrics page over that.
To see the currently-configured wifi settings, make a GET request to the /wifi route. If you
would like to change the SSID and/or password you may do so by making a POST to the /wifi route.
The post body should be a string in the format "\n". A successful POST will
persist the new SSID and password to onboard flash memory. It will not automatically connect to the
new wifi network until either restarted or a POST is made to the /reconnect route.
If you would like to change the location embedded in the prometheus metrics and Homebridge sensor,
you may POST a string payload to the /location endpoint. A successful POST will persist the
location to onboard flash memory and immediately update the location in Homebridge webhooks and in
the metrics scraped by Prometheus.
- The sketch currently requires you to hardcode the homebridge hostname and port, as well as the virtual sensor names. These will be configurable in a future release.
- The TLS certificate is currently hardcoded. It will be configurable in the future.
- The temperature and pressure offsets are currently hardcoded. These will be configurable in a future release.
If an I2C OLED display is connected at address 0x3c, it will attempt to display the latest completed measurement data on the screen, as well as the wifi signal quality (or SSID if in AP mode).
- A Pico LiPo SHIM and LiPo battery
- An OLED display