I am trying to control my electric blind (elero brand, controlled by this remote) from my RPi4, and while I’m fine tinkering with anything on the software side, I must admit my knowledge of GPIO and RF stuff is close to nil.
Much like this previous poster, I’ve found out that 868MHz RF transmitters are a lot less common than 435MHz. And of the ones leftover, I struggle to confirm which ones might let me capture and replicate the signals sent by my remote…
Among (local) online options, I found:
- LoRa RF transmitters ostensibly geared at Arduino (but I guess could be wired to the RPi4 GPIO ports?), but also specific to LoRa protocol, which doesn’t seem to be what my blinds use (?)
- Waveshare LoRa hat which would take up all my RPi4 GPIO ports… Also: still LoRa…
- Various boards and USB gateways to the “enocean” protocol, which I’m assuming also wouldn’t play with my random other-brand blinds…
Any guidance on what type of RF transmitter I should be looking for, and what the next steps might be to hook it up to my RPi4 and replicate existing signals?
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The Pi is pretty tangential to any answer. You first of all need to find the protocol used to communicate with the blinds. There isn’t a single radio protocol. – joan 5 hours ago
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1use software defined radio module and a computer … start with an SDR stick such as this one … many tutorials are on the web … adafruit.com/product/1497 – jsotola 3 hours ago
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There are loads of cheapie 868MHz transceivers from AliExpress: aliexpress.com/popular/868mhz-transceiver.html. I would recommend RFM95. I used to play with RFM12 433MHz in my Arduino Decimilla days. One catch is tha you need to learn SPI which has a steep learning curve. But they are tons of SPI tutorials out there. Or modify Arduino RFM12 C++ sketches. – tlfong01 1 hour ago
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This is the cheapie US$5 Rpi4B buster compatible SPI 868MHz transceiver I recommend: fr.aliexpress.com/item/…. In case you are using Rpi4B buster Python 3.7.3 Thonny 3.2, I will be glad to try to help out debugging. – tlfong01 1 hour ago
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Or try this RpiZero bonnet for 868MHz RFM95 Lora compatible module : youtube.com/watch?v=MV7OzW8YHas. – tlfong01 52 mins ago
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More references (WARNING: Very expensive!): (1) youtube.com/watch?v=wnHwWGqUUyc, (2) youtube.com/watch?v=MV7OzW8YHas. – tlfong01 46 mins ago
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And as usual, Lady Ada has newbie friendly tutorials on RFM95 868MHz and also Lora stuff: learn.adafruit.com/…, – tlfong01 1 min ago Edit
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