I’m trying to get my new RAK7201 LoRa button working, and wasn’t having much luck. Since I’ve have firmware version issues with several other sensors, I decided to update the firmware on it to the latest 915MHz version.
The “Hyperterm” included with the git is in Chinese, which makes it unusable for me. I tried Teraterm, but it caused aborts when I tried to download. I went back to “Hyperterm” and tried to guess the proper inputs based on the getting-started document. Unfortunately, I’ve ended with a unit that won’t stop trying to download the firmware. All I get are the repeated "C"s. Unplugging and replugging the USB cable has no effect. Opening the serial port in any terminal program just results in the "C"s. No button presses on the device has any effect. The blue lights on buttons 1 & 3 are blue.
How can I reset the device?