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https://revolutionpi.de/forum/viewtopic.php?f=18&t=3118

Is there …?

The RS485 interface of the PiBridge sometimes delivers a strange signal. It is not rectangular formed, is this normal?

Yes, it is normal and if the thresholds are respected the decoding works.

https://revolutionpi.com/forum/viewtopic.php?t=3958#p14109

Is there an adapter for installing a CM4 module into a RevPi module?

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