search

zeevy / grblcontroller

Compact android mobile application for gcode streaming and controlling a cnc machine with grbl firmware
GNU General Public License v3.0
200 stars 71 forks source link

Support for normal USB connection. (Raspberry Pi 4 with Android 11) #135

Closed ChrisAnd1998 closed 3 years ago

ChrisAnd1998 commented 3 years ago

Currently i'm trying different solutions to build a gcode sender. I want to do this with a Raspberry Pi 4 with touchscreen. So i came across your nice GRBL Controller app and it worked fine on my phone with OTG. I decided to install android 11 on my Raspberry Pi 4 but sadly the app gives the error "Device not supported" it did recognize it though. I'm sure this has to do with the USB connection not being a OTG connection. Would it be possible? This seems to be the best solution for my project... Android is just the best for touchscreens and easy to use. I can just use Raspberry Pi OS with UGS Platform or Classic but that's just not really usable and slow.

Maybe you have a Raspberry Pi 4 laying around to test it.. I just flashed the image and installed the apk manually. https://konstakang.com/devices/rpi4/

IMG_20210309_114008 IMG_20210309_114008 IMG_20210303_165243 My project: https://github.com/ChrisAnd1998/GRBL-Pendant-with-LCD

zeevy commented 3 years ago

USB driver in the app supports only few chips. Have you tried bluetooth connection?

ChrisAnd1998 commented 3 years ago

@zeevy Haven't tried that yet. I kinda want to avoid using bluetooth but if there is no other option I will...

ChrisAnd1998 commented 3 years ago

@zeevy After multiple restarts it's just auto picking the wrong USB. 2 are connected 1 for touchscreen and the other for GRBL. Sometimes it picks GRBL (which works!) and mostly the touchscreen. It can be fixed by having an option to manually set a device as default.

zeevy commented 3 years ago

@zeevy After multiple restarts it's just auto picking the wrong USB. 2 are connected 1 for touchscreen and the other for GRBL. Sometimes it picks GRBL (which works!) and mostly the touchscreen. It can be fixed by having an option to manually set a device as default.

Manual selection can be good option in case of multiple USB devices (never faced this issue in mobile/tablets as they have only one usb port)

ChrisAnd1998 commented 3 years ago

@zeevy Would be very nice if you can add it! It will give people so much more possibilities for their projects. I could have used an old tablet but wanted something replaceable and a Raspberry gives that. I have been trying to temporally fix it..

This is what i came up with on GrblUsbSerialService.java line 296:

First i tried hardcoding the ProductID and VendorID: if (deviceVID == 0x2341 && devicePID == 0x0042) { Which works fine for me.

Now i retrieve the ManufacturerName and if it contains Arduino then use that.. This works for both my UNO's and MEGA's from different brand's. Maybe this is a simple solution to keep auto selection. Not sure if every Arduino contains Arduino in the ManufacturerName

String deviceNAME = device.getManufacturerName();

if (deviceNAME.indexOf("Arduino") > -1) {