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  • in reply to: ESP32S3 – E22-900T22S not working #32333
    Pataone
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      Hey,

      Just a quick update from my recent investigation:

      At the beginning of the received frame, I noticed an unexpected 0xFC byte:

      Serial available before read: 13
      Received bytes: FC C1 00 09 00 06 12 62 00 04 43 00
      Available buffer: 12, Structure size: 12

      This extra byte (0xFC) shifts the configuration data by one byte. It’s consistently the same byte (0xFC), leading me to believe the issue is software-related, possibly with the ESP32-S3.

      I verified this by capturing the frame with an FTDI device. The E22 module indeed sends the correct frame: C1 00 09 00 06 12 62 00 04 43 00 00, without the extra 0xFC.

      I’m unsure about the cause, but I’ll continue investigating further tomorrow.

      Thomas

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