Strange used batch of EM7511 modules

IoT Modules MC/EM Series
9

Finally got this to work, after too many hours of messing around. If I would just have one of these modules, definitely wouldn’t have bothered.

I’ll include a brief overview of the steps that it takes to get one of these em7511 possibly engineering samples to work with the current firmware 1.14.02 using Putty…

  1. Set AT!USBCOMP=1,3,100D
  2. AT!RESET
  3. Update firmware with windows exe
  4. AT!ENTERCND=“A710” followed by AT!USBPID=9091,9090
  5. Enter engineering mode - won’t go into how to do this. Involves at!openlock? and giving the module the correct response
  6. AT!IMPREF=“01.14,02,00,”",""
  7. AT!RESET

Modem should now be out of LPM due to the FW/Carrier/Config Mismatch and be on the newest firmware.

Was this worth the time? Maybe since I have a bunch of these modules. Definitely not if you’re trying to save a couple bucks on a single unit. Also, this works for my specific problem on my specific batch, no guarantee you are having the same problem.

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