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…fortunately the worst things I started to imagine were false. Mio came back home. We conclude she might be being locked by mistake in a barn from the neighborhood. That’s where started the idea of a small RF beacon for Mio. It should to be very small, at least a month of battery life, and can enable a kind of search with a receiver.
Some tests were done with three different RF modules:
3D cases were printed for each module to use with a 3V coin cell. Studies started with the ST module:
I’m not sure about the reception range, is it enough to locate the beacon by walking around in the village? That’s why I should continue to study the other solutions. For example, I just saw it exists with a 433MHz ceramic antenna as well. Maybe it enables the use of the LoRa module at low power. They are still interesting as their modulation scheme makes the reception very sensitive.
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