Issue: RAK4200 breakout switched to boot mode but firmware upload tool stuck on Boot message
Setup: RAK4200 breakout, USB to serial, dupont cables
I’ve created a small app to use an I2C sensor on RUI but I’m experiencing issues getting it on to a breakout board and now have TWO stuck saying
<BOOT MODE> when I put them on the serial tool but it won’t proceed with the download using the firmware tool. I’ve found that it only really works if I provide the board with independent power. I have to cycle the power on the board for the firmware tool to see that the board is in boot loader mode, which it acknowledges on screen, and then just sits there for 15+ minutes before I get bored and try something else.
Firmware is reported to be 126.96.36.199beta4
Boot loader says it is 3.2.6
I have successfully uploaded this firmware to a RAK4200 EVB and I’m getting the debug output I’d expect to see from my code.
Ideally I’d like instructions on the settings for using a proper programmer (like an ST-LINK v2 or SEGGER) so I don’t have to mess about with two serial based tools plus independent power plus, judging by the firmware update tool on the EVB, a quite slow download speed.
And how do I take the breakout boards out of Boot Mode - or do I have to reflash the boot loader - which on the EVB previously didn’t end well.
Hoping to catch @Nicholas or any one else that knows these things so I can finish this work today in my time zone!