Started 5th July 2024
I had a lot to do with the wireless Oregon temperature/humidity sensors. See various projects here on this wiki. Time passed and they got more expensive and the technology older. When I needed to measure the humidity somewhere and was not inclined to start playing with an Oregon sensor, I found the Govee sensors. The beauty of these is that you get a graph on a phone of the results - the sensor can store many readings.
I was so impressed I got a number of sensors. They come in two varieties one with an LCD display (H5075) and a smaller one (H5074) without.
The Govee sensors use Bluetooth low energy (BTLE) to communicate. Stand a couple of metres (six feet) away with your phone and it will download the data. I live in a modest house (typical maximum distance 20 metres, 50 feet), but my phone can't receive all the sensors at the same location.
So the question arises how to log all the data. It seems the Bluetooth receivers in phones or computers are limited in range. Something with a dedicated antenna does better - if only because the antenna can be positioned away from desktop clutter. A central location upstairs in the house works best.
I found a couple of Bluetooth dongles - both use a Realtek chip. One is version 5.1 the other version 5.3. They worked on Ubuntu Linux and the Raspberry Pi 5 with no messing about. From the photo the dual antenna version appears to have its two antennas connected in parallel.
WimsWorld has investigated the data format and provides software to log results. There are a number of blog posts.