Multible Sensors with on MCU

[TheSmartGerman]

Multible Sensors with on MCU

[rbaron]

I took a quick look at the BTHome v2 docs, specifically the Multiple measurements of the same type section:

If you want to send multiple measurements of the same type, e.g. three temperatures, you can just add multiple measurements of the same type to the payload. A postfix will be added to the measurement name (e.g. temperature_2) in the order of which you define the measurements. Note that this implies that you will need to use the same order in each advertisement, to prevent measurements being assigned to the wrong entity. If only one measurement of a certain type is sent, no postfix will be used.

I believe you could just attach multiple moistures values in the same advertisement packet. At 4 bytes per reading, you could fit 5 sensors there without any hacks.

[TheSmartGerman]

In fact i did some research the last few days and ordered this sensor's. With the TLC555 you can run directly from 3V, if you like you also can modify too do frequently counting instead of a analogue voltage... Am 19. Oktober 2023 16:47:25 MESZ schrieb "Dawid Wróbel" ***@***.***>:

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This would be particularly interesting if one could couple it with these super cheap Aliexpress sensors readily available: https://www.aliexpress.com/item/32832538686.html -- Reply to this email directly or view it on GitHub: #159 (comment) You are receiving this because you authored the thread. Message ID: ***@***.***>

[rbaron]

It's definitely be possible to multiplex a single MCU to multiple capacitive sensors. It would require some nontrivial software and hardware redesign though.

[TheSmartGerman]

thx, I'll have a deeper look in your work. the HW shouldn't be a problem for me. For the purpose (plant monitoring) it's also not neccessary to monitor multible sensor at the same time. I guess, to work with ESPHome the protocoll have to be extended to suppor more then one moisture reading? Or, if you "fake serveral" sensor, one mcu need serveral mac adress?

[wrobelda]

This would be particularly interesting if one could couple it with these super cheap Aliexpress sensors readily available:
https://www.aliexpress.com/item/32832538686.html