@Arno yes, i can remove the battery-bottom from the FIRE module, put the SERVO2 module instead and attach the battery at the bottom (to use the charger). just thought: to have each SERVO2 has its own power supply (maybe using more SERVO2+Battery modules with each less servos attached?)

@arno Thanks Arno for the push in the right direction. I was able to get this to work on my Core 2 EXCEPT using G21 or G22. I will write up a tutorial on try to find a way to post/share. Thanks again Arno!

@robalstona thank you for the guidance as it saves me a lot of trial and error. Appreciate it.

@felmue said in Some questions...: Hello @NilZ apart from the M5Stack color (white vs. black) there is no difference - you can double-check that yourself as for both the schematic link is the same. yes no, the I2C address is fixed to 0x27. There are no dip switches or solder pads to change the I2C address I can see. That said, in the schematic you'll see that the chip doing I2C has three address pins but they are all tied to VCC. Thanks Felix The GRBL has a set of dip switches that are used to change the I2c address from 0x70 to 0x71 https://docs.m5stack.com/en/module/grbl13.2

Thanks @robalstona! That's a great pointer. I think I found the code to set the charge current (I use C++/Arduino code): https://github.com/m5stack/M5StickC/blob/master/src/AXP192.cpp#L470 I'll order the new batt, try this out and post my findings here.

Thanks VERY much!! This is exactly what I wanted.

Hello @JackRazors to avoid the crash add a delay(1) into the for loop of the BtnScrController() task function. This allows the system to reset the watchdog. Thanks Felix