Bambu Firmware Bug Reporting Thread

Problem: MQTT print speed setting type confusion bug
Firmware Version: 01.06.01.00 (P1 series)
Printer: P1 series, but might affect others too
Steps to reproduce:

  1. Connect to the printer via MQTT.
  2. Send the following command to set the print speed to an incorrect value:
{
    "print": {
        "sequence_id": "0",
        "command": "print_speed",
        "param": "A" // this is usually a string containing
                     // a number from 1 (silent) to 4 (ludricious)
    }
}
  1. Observe the speed value shown on the printer and inside Bambu Studio / Bambu Handy. Notice that it has a strange value (in my case, 254% and 510%).

I also opened a topic on this issue here.