Grove AI Hat UART Issues

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yokonav
Pre-kindergarten
Pre-kindergarten
Posts: 15
Joined: Mon Feb 09, 2015 9:10 pm

Grove AI Hat UART Issues

Post by yokonav » Tue Aug 13, 2019 11:57 am

RPI 3B+ is powered using 2.5A/5V adapter.and is attached to the Grove AI Hat. The J4 toggle button is ON so the Grove AI Hat gets power from the RPI.
The CH340 UART port is not showing in the Arduino IDE or by using ls -l /dev/tty.*. When I power the Grove AI Hat directly and keep the J4 toggle button at ON position and not powering RPI directly, the UART port appears. I want to power RPI separately but I can't keep the J4 toggle button at ON position when powering both separately. If I keep the J4 toggle button at OFF position while powering both separately the UART port disappears again. Also, the RPI is not booting up by powering from AI HAT (this behaviour is random, I believe due to insufficient power from AI hat side). I am using MacBook Pro.

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