stm32 micromod with AWS ExpressLink AT carrier board

I have the AWS ExpressLink kit which came with ESP32 micromod processor board. This is working great. I then ordered the stm32 micromod. I can’t get it into dfu mode. (Hold boot button, then press reset) I tried building the blink app in arduino for stm32 micromod. App builds fine, but uploading to board says:

/home/user/.arduino15/packages/SparkFun/tools/STM32Tools/2.0.0/linux/stm32CubeProg.sh 2 /tmp/arduino_build_854192/Blink.ino.bin -g


STM32CubeProgrammer v2.9.0


An error occurred while uploading the sketch

Error: Target device not found

Establishing connection with the device failed

How can I get it to upload code? Why is device not found?

Hello, had there been any problem with the board installation?

No problem with installation. Blue led is on. I can open /dev/ttyUSB0 but nothing coming out. Also nothing when boot+reset to enter DFU mode. My esp32 micromod works fine.

issue resolved… I’m too embarrassed to explain my mistake! :oops: