My setup is not really a pi zero build but i couldn´t find any other section taht this topic would fit.
I´ve built a Raspberry Pi 3 B+ on classic gameboy shell. i use Arduino Pro MIcro for the Controller.
For Power and Safe Shutdown i got a TinkerBoy PowerSwitch.
For Battery monitoring i got an ADS1015 and installed MintyBatteryMonitor.
So i installed both following GitHub and TinkerBoys instructions.
SafeShutdown works as it should. The MintyBatteryMonitor was installed sucessfully, no errors but on reboot no icon showed up. To check i grounded GPIO7 and indeed the PI turned of. When i ground GPIO19 nothing happens. I´ve read that you can do the same with "Select" (2 secs) but again nothing happens, never seen the battery icon. See connections below.


(nevermind the loose cable)
ADS1015
A0 connected to Battery+ with a 10k resistor
SDA to SDA on PI3
SCL to SCL on PI3
VDD and GRND to VDD and GRND on TinkerBoy PowerSwitch
I triple checked it.

So with this said i don´t know how i should debug this? Any tips?
ADS1015 Faulty?meh...
Should i start a fresh SD? I would cry because i dont even know what image i used eheh
Also thought of Trying OneForAll but i´m afraid the GPIO assigned for buttons bugs my current configuration, i dont use GPIO's for the controller. Can i remove the Key maping from OneForAll script? Thanks! in advance!!