I am trying to sniff a serial communication between two devices. One of them sends a command (6 bytes + 2 bytes CRC), the other one responds (4 bytes + 2 bytes CRC). My computer monitors the exchange with an USB-serial converter and PuTTY. I have access to the source code of both devices, and the baud rate seems to be set to 57600.
However two things are quite astonishing :
- In PuTTY, I must set the baud rate to 57100 to "get the bytes right". At 57600, I see gibberish.
- There seems to be "junk" in the response once in a while (see picture below).
I don't know what could be causing this, anyone has an idea ?