Hello—I’ve been connecting to devices @ baud 14400 for a few years to kick them into DFU mode but one of my devices (an E-Series 2G/3G) is not responding to that as expected today. Another device is, so I am confident that the routine and computer side of the connection are not the problems.
When I connect at 14400 (I’ve tried using a few different software options: Mac terminal, CoolTerm, VS Code/Workbench), the errant device appears to restart with RGB LED turning off for a second, flashing magenta for ~ 10 seconds, and then it restarts the user firmware that I already had on there. If I connect at 28800, it does go into listening/flashing blue mode. I’ve previously used the 14400 baud technique to put this same errant device into DFU mode dozens of times but today it is not working.
Unfortunately I do not have physical access to any pins other than the four USB pins (it is entirely potted in epoxy other than those) so I cannot put it in DFU mode using the pin/button technique.
Does anybody know what could be causing this new behavior and how to fix it? Thanks!