MicroMod Weather Carrier, Artemis Processor, RPi and ttyUSB gone missing

Development Boards MicroMod
1

Hi all. I have the Weather Carrier board with piggy back Artemis DEV-16401 along with the Weather Meter Kit.

  • These have been connected to a Raspberry Pi and recording data since 2021.

  • The RPi is in the garage

  • The Carrier is in an outdoor shield housing under the eaves

  • The Carrier is connected to the RPi with a long single USB-C cable

I just updated the RPi from “stretch” to “bullseye”.

  • Previously, the board worked, uninterrupted since 2021

  • After update, the system stopped working

  • The data-read program/script connects to /dev/ttyUSB0

  • USB0 now fails uart probe

When I first plug in the USB cable, I will see ttyUSB0 for under a minute before it disappears.

This is true for plugging it into either of the RPi larger USB ports.

‘dmesg’ has a sequence of messages about New USB device found

  • vendor 1a86

  • product 7523

  • bcdDevice 2.64

  • interface usbserial_generic

  • driver ch341

  • ch341-uartconverter detected

  • failed to send control message -32

  • ch341-uart probe of ttyUSB0 failed with error -32

  • USB disconnect

I am mainly an application software developer so not terribly familiar with the USB connection world.

Thanks in advance for any suggestions!

2

As you updated the OS you will probably also have to update the CH340/341 driver. https://github.com/aperepel/raspberrypi-ch340-driver