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this post was submitted on 11 Apr 2026
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Programming
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Yes Pebble OS is now open source, however I think adding RSSI might only work on newer devices, since classic pebbles are just Bluetooth and Bluetooth le. Though they may have Bluetooth le as a part of pairing?
Still a fun experiment and a good way to see why Bluetooth headphones actually are as reliable as they are.
I don't follow. It's extremely unlikely that the actual hardware doesn't give you RSSI.
If I am right I don’t think Pebble watches has Bluetooth LE, it has the ability to broadcast itself but once connected uses Bluetooth. The OS doesn’t expose LE so I don’t think getting the signal strength is possible
RSSI just means Received Signal Strength Indicator. Any radio system can provide it - it's not specific to BLE.
Bluetooth classic can provide RSSI too. Maybe the OS doesn't expose currently it but that's why I was suggesting modifying the OS. The only difficulty might be if the drivers are closed source, but worth a look I reckon!