I have an IoT application where, ideally, I’d like to use the three Ruuvis I bought to measure:
#1 - water temperatures in multiple locations, so the Ruuvi would remain in roughly 1" (25mm) of water for extended periods of time
#2 - temperature and humidity for an Aerated Static Pile, a type of compost pile, where one or more Ruuvi devices would be placed about 24"-36" (600mm-900mm) deep in poultry litter.
#3 - temperature and humidity in points of a greenhouse
In #1 above, temperature range would be roughly 32-180F (0-82C) with 50-130F (10-55C) being “normal”. Beacons would ideally measure in water (1" deep) and air. The application of the “hot” upper limits are a solar thermal collector tank and a the top of solar PV panel
In #2 above, the device can be placed in the middle of a “ball” of wood chips. I can take a picture, but the wood chips are meant to provide some air space between the Ruuvi and composted material. As an experiment, I have placed the Ruuvi in the pile in a plastic bag at about 10"-12" (25mm-30mm) and I can receive the beacon at about 20’(6 meters) direct line of sight but not through a wall or door. I can place the receiving RPi close to the pile, but not sure if the data will be reliable or if the Ruuvi will survive.
In #3 above, multiple devices will be placed throughout the grow house and the beacon data will be used to switch on/off (e.g. sonoff) environmental control systems (e.g. fans, pumps, etc.)
Of the above, I think #3 is very realistic for the Ruuvi. I have not tried #1 or #2 yet because I don’t want to ruin them. I wanted to ask this question before looking for other solutions. If I can get this to work, I’ll standardize on Ruuvis,