Hive monitoring - DIY

[fatshark]

This is an attempt to corral discussion of DIY hive monitoring equipment - temperature, humidity, weight, noise etc. in a single thread.

There are two recent relevant threads:

1. Varroa estimations in winter - where Jon first mentioned Arnia monitors in post #9
2. Build the Buzz - which started with an 'advert' from the BBKA website and quickly developed into a discussion of home-brew technology to monitor hives.

The most complete solution at the time of posting is the ear trumpet proposed by Gavin.

ear-trumpet-3.jpg
Oddly, neither can I. But I can reinstate it.

Wow! Lucky I didn't post anything abusive by accident or I'd have been reprimanded