Everything was working well. Then I updated the firmware, apparently successfully. I got the “Upload complete!” message.
But now, the SD card and the IMU are “offline.” I removed the SD card, and all the files were there, but I formatted it anyway. That didn’t help. The PWR LED no longer illuminates, and it says: “ICM-20948 failed to init.” (Whatever that means.) I am using Tera Term.
Please tell me I didn’t just kill another one of these.
It seems to be operating OK, but I can’t see the datalog files on the SD card using Tera Term. The dir command returns nothing. But the files are there, and can be downloaded using Zmodem. See the screenshot: