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zeevy / grblcontroller

Compact android mobile application for gcode streaming and controlling a cnc machine with grbl firmware
GNU General Public License v3.0
202 stars 72 forks source link

OTG connection #151

Closed naasking closed 2 years ago

naasking commented 2 years ago

I'm having trouble establishing a USB connection. I have a bunch of Android phones, some of which I know support OTG, but I can't make the connection to grbl. I'm using an Arduino Nano with the CH340C chip which is supported from what I've read here.

I'm thinking the issue is the Y cable I made. The regular data pins are fine as my computers recognize the phone when plugged in, it just doesn't work with the phone as host. Per this description, the ID pin on the cable going to the phone may be grounded internally, thus indicating it can't act as a host. Would that be correct?

I have a zillion cables so I'd rather just reuse what I have rather than buying yet another cable if I can.

zeevy commented 2 years ago

I am not good on these connections or wires. As you already tried with different phones. Can you also please try with another nano or uno boards

naasking commented 2 years ago

The link I provided is correct. I made an OTG cable and connected the ID pin directly to ground and the OTG functionality now works. Thanks!