yaha_temperature_monitor

Yet Another Home Assistant Temperature monitor.

Uses micropython, Raspberry Pi Pico W, and DS18B20 1-wire temperature probes.

Features

• Uses micropython and asyncio/mqtt_as for reliability and performance.
• Can handle network downtimes and flakiness
  • Has hardware watchdog timer (WDT) support
• Integrates into local MQTT and supports MQTT Discovery for sensors in Home Assistant

Requirements

• Pico W microcontroller board, connecting to WiFi.
  • Up to three DS18B20 1-wire temperature probes connected
  • (Optional) OLED matrix (using I2C) for displaying info
  • (Optional) BM[EP] sensor (using I2C) for ambient condiditions
• Home Assistant with MQTT integration

micropython target setup

Assumes mpremote is installed in macOS (host) and recent version of micropython (target).

I use macOS or Linux, and am targetting Raspberry Pi Pico W.

❯ mpremote connect /dev/tty.usbmodem33101
python-repl
Connected to MicroPython at /dev/cu.usbmodem33101
Use Ctrl-] or Ctrl-x to exit this shell

>>>

mip

like pip for micropython

# set up for your wi-fi, and then copy over
mpremote fs cp secrets.py :
mpremote run mip_install.py

Putting on Pico W

# customize these before copying
mpremote fs cp secrets.py :
mpremote fs cp config-picow1.py :config.py
mpremote fs cp device-picow1.py :device.py

# testing
mpremote run test_ds18b20.py
mpremote run test_bme.py
mpremote run test_1306disp.py
mpremote run test_ha_mqtt.py

# This is the main show
mpremote run main.py

To have it launch on "boot up", copy main.py to Pico W storage. micropython will run it after reset.

mpremote fs cp main.py :

Other

Spun out from https://github.com/idcrook/picow-projects/tree/main/ha_temperature_discovery