Wipy3 does only boot after re-connecting 5V input
I have the following setup:
- Wipy3 in Expansion Board 3
- Another board (Atmega 1284P @ 5V) with 5V power regulator.
- SPI with 5v/3.3V level shifter inbetween the two boards. (working perfectly if Wipy is powered from USB).
Now I want to power the Wipy with the 5V power from the second board. (If second bopard is powered, Wipy should also boot) If I connect the GNDs and 5V to VIN, the USB-LED of the expension board is glimming, but the Wipy is NOT booting.
Only if I then re-connect the 5V input pin, the RGB LED flashes and the Wipy does boot. After that everything works.
How can I achieve the Wipy booting when 5V power is provided initially?
Thx for your support,
@robert-hh I just connected power drectly. That works, now I have to do some soldering in order to check if it works together with the level-shifter. Thx so far!
robert-hh last edited by
@romnan It looks like some interference of the expansion board. What happens if you drop the expansion board 3 and connect the WiPy directly?