Solved
Restore ST-Link Connection on B-L072Z-LRWAN1
In order to achieve minimum power drain on the B-L072Z-LRWAN1 discovery board, it is necessary to remove some solder bridges
See:
And:
https://community.st.com/s/question/0D50X00009q4M1zSAE/cant-power-bl072zlrwan1-with-battery
To be able to use the onboard ST-Link again, these connections need to be restored:
- NRST: link CN4.3 to CN12.5;
- SWD: fit two links on CN8;
- VCOM: link CN5.1,2 to JP6.
Rather than have to mess about with 2 separate links for the SWD, a single-row 4-pin header can be adapted:
