Central unit:

modules:

• 1 i2c BME280 sensor
• 1 i2c DS3231 hw clock
• UART connection with the Raspberry

micropython dependencies:

• BME280.py
• umqttsimple.py
• ds3231_port

Pheriferal sensors:

modules:

• 1 i2c BME280 sensor micropython dependencies:
• BME280.py
• umqttsimple.py

Raspberry:

software:

• Raspbian lite 32bit without desktop environment
• Matchbox window manager
• Nodered
• Influxdb
• Mosquitto
• autoexec bash script from /etc/rc.local
• feh and python script to control it for screensaver
• chromium
• unclutter

hardware

• gpio buttons
• hdmi display
• optional usb drive to store influxdb data
• UART connection with the main microcontroller