Idea

I want to use a DS18S20 wired to a raspberry pi to alert me, when I leave the freezer door open by accident again (this has been happening way to often lately)

I imagine it like this:

• The pi watches the temprature and emits an optical and audible signal when the temperature drops under a certain threshold
• The pi watches the door and also alerts me audible when it is open an extended amount of time
• The pi operates a telegram bot who would send messages to a group in the above events
• This way I can easily add users to the bot, without hardcoding any numbers
• The alerts can be silenced via sending a message in the telegram group
• The bot maintaines a pinned message with the current temperature in the group
  • unpin all messages
  • send new message with current temerature
    • save of that id persistently (in file)
  • pin that message
  • from now on, update the message when a new temperature is read

How to use

Check /sys/bus/w1/devices/directory. Every sensor that the sytems sees will be listed here as subdirectory. There naming will be a component family code follow by _ and an unique identifier. The DS18S20's familiy code will be 28 Grab the name of the directory.

Run temp-alarm.py temp-alarm.py <target_temperature> <sensor_dir>

The script will loop until exited via KeyboardInterrupt

To Dos

See issue tracker