I've tried my brand new Tinkerboy power switch I received on last friday. Well, it's a big fail
I need to know if I'm wrong using it ! I tried to simply solder two wires from the powerswitch to the PP2 and PP5 (I tried on the GPIO too) of my pi 3A+, but when I plug the alimentation (raspberry 3 official one), I just see the starting screen
this one :
Here are some pictures (sorry for the bad quality) :
(I know it is not the initial point of the post but I will go to battery monitoring, once everything is clear to me about this powerswitch)