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openlumi / openlumi.github.io

OpenWrt for Xiaomi Zigbee gateway with imx6 SoC DGNWG05LM, ZHWG11LM
https://openlumi.github.io
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DGNWG05LM welding issue on PCB board #42

Closed dumas69 closed 2 years ago

dumas69 commented 2 years ago

Hi, during the mod of the DGNWG05LM gateway, unsoldering the serial connections, the TX pinout was detached from the board. Having to repeat the procedure, where can I find an alternative point to be able to solder the TX pin?

devbis commented 2 years ago

AFAIK, the other point is under the processor. So you have 2 possible ways:

  1. Restore the TX pin (maybe using a microscope)
  2. Use resistor shifting to switch processor to booting from USB mode. image

More details here https://habr.com/en/post/494296/