#Aliexpress has loads of super cheap

1 messages · Page 1 of 1 (latest)

minor barn
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I'd recommend Zigbee (which is 100% local) over RF. A lot of RF stuff only sends messages when something happens, so you can't tell if they're dead or lot. Some door/window sensors even only send an open signal, never sending a closed one.

scarlet lantern
minor barn
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Tuya is a roll of the dice, sometimes good, sometimes terrible

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Xiaomi stuff is generally good

steady grail
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@minor barn The door sensors I bought send 3 signals: open, close, and battery-low; but they're really vague about how they do that, other than saying "433mhz" on them (I pulled them open and notice they have the same crystal as an arduino transmitter/receiver pair I also bought, but the receiver isn't obviously "noticing" anything on my oscilloscope when they trigger). Might be time to hook an ESP32 driver up to it before I give up though. Maybe shelving those and buying new Zigbee ones is better than wasting my time? Any suggestions about which frequency to get? (are devices common for all 3 bands, or are some old and unused now, etc? Is range affected much by 2.4ghz? I've got a ton of thick concrete walls to go though...)

steady grail
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@minor barn If I want to read sensors using a linux PC, is there a USB serial-style dongle I can buy ready-to-use for that purpose?

minor barn
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For Zigbee @steady grail ?

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#zigbee-archived can also answer your other Zigbee questions - and the pinned messages there are good

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Oh... and ... this isn't IRC, you don't need to tag me on every response... I'm in the thread, I'll see your messages