Communication between 2 Bela Mini

giuliomoro

Great now that you can connect you can take the opportunity to back up your projects for peace of mind.

Additionally, please post here the content of the two files you modified.
You can use cat /etc/dhcp/dhcpd.conf and cat /etc/network/interfaces to show them on the terminal and copy/paste them here.

FelixDoyon

dhcpdconf.txt

4kB

interface.txt

1kB

Here you go!

giuliomoro

In interfaces is OK, but in dhcpd.conf you have

subnet 192.169.8.0 netmask 255.255.255.0 {

but it should be

subnet 192.168.8.0 netmask 255.255.255.0 {

(i.e.: you are using 169 instead if 168)
Not sure how that would break things ...

Anyhow, uncomment the addr4 line in uEnv.txt again and give it another try.

FelixDoyon

It's still not detected. I'll try to flash it with a unmodified os to make sure it is not just mine, and I'll let you know if it worked.
Thank you for your time so far!

giuliomoro

Is there no USB device at all showing up ? Not even the serial port or MIDI or storage?

FelixDoyon

giuliomoro

giuliomoro Is there no USB device at all showing up ? Not even the serial port or MIDI or storage?

When I plug it, I don't see any changes in device manager, and it doesn't show up in file explorer as a partition. It's only when I uncomment the line addr4 in uEnv. Any idea why?

I've flashed Bela OS on the SD card and did again the step. The only thing I've did differently is that I added the line addr4 in uEnv after adding/modifing the 3 files with SSH. I've did it that way because it wasn't showing up with the addr4 line. (It worked earlier because I made a typo in uEnv)

giuliomoro

FelixDoyon When I plug it, I don't see any changes in device manager, and it doesn't show up in file explorer as a partition. It's only when I uncomment the line addr4 in uEnv. Any idea why?

Not sure I understand this , can you explain it better? When the addr4 line is commented out do you see devices or not? And we are still talking only about the USB micro cable, right?

FelixDoyon

giuliomoro And we are still talking only about the USB micro cable, right?

I'm only using micro usb to connect Bela to my computer.

giuliomoro Not sure I understand this , can you explain it better?

When uboot_overlay_addr4=/lib/firmware/PB-USB1-PERIPHERAL.dtbo is not in the file uEnv. the Bela is visible from my computer (I can interact with Bela normaly), but whenever uboot_overlay_addr4=/lib/firmware/PB-USB1-PERIPHERAL.dtbo is in uEnv, it is not visible from my computer (I don't see the partition, and SSH can't connect to root@Bela.local)

giuliomoro

Oh ok that makes sense. Get on the board and make sure that file exists:

ls /lib/firmware/PB-USB1-PERIPHERAL.dtbo

FelixDoyon

Yes it is present!

giuliomoro

Do the lights on the pocketbeagle blink when you power it on even if it doesn't show up on your computer?

FelixDoyon

Hi Giuliomoro
The two next command are executed without the line uboot_overlay_addr4=/lib/firmware/PB-USB1-PERIPHERAL.dtbo in uEnv.txt

giuliomoro grep UDC /opt/Bela_gadget.sh

The first file is not there

Here is the return of the second command

giuliomoro Do the lights on the pocketbeagle blink when you power it on even if it doesn't show up on your computer?

Yess it blinks. I can send you a video if you want to see how it blinks

giuliomoro

Also: can you show the result of the following commands:

grep UDC /opt/Bela_gadget.sh
grep v0 /etc/motd

giuliomoro

FelixDoyon The first file is not there

Sorry, try grep UDC /opt/Bela/bela_gadget.sh

FelixDoyon

Here is the result

Again, it was execute without the line addr4 in uEnv.txt

giuliomoro

right, that's the issue. Edit that file and change that line to:

ls /sys/class/udc/ | head -n1 > UDC

FelixDoyon

Now it work! Let me try these steps and I'll let you know the outcome in few minutes

giuliomoro reboot Bela, connected only with the USB micro cable.
get back onto Bela and execute /opt/Bela/usb1_network.sh
run ifup usb2
run dmesg -w and leave it running in the terminal
moment of truth: connect the USB-A to USB-A cable to the same computer where you are currently connected over micro USB
does a new network show up on the host?
does anything appear in the terminal window where the process is running?
can you connect to the Bela IDE on 192.168.8.2?

FelixDoyon

Here are the result!

giuliomoro get back onto Bela and execute /opt/Bela/usb1_network.sh

giuliomoro run ifup usb2

it execute with no output

giuliomoro run dmesg -w and leave it running in the terminal

Seem to execute normally with a lot of output

giuliomoro moment of truth: connect the USB-A to USB-A cable to the same computer where you are currently connected over micro USB

It show those 2 lines in the middle when I plug it

giuliomoro does a new network show up on the host?

Yes! Here is when not plugged in

And when i plug it via Usb A, Ethernet 12 appear

giuliomoro does anything appear in the terminal window where the process is running?

Do you mean on the ssh session?

giuliomoro can you connect to the Bela IDE on 192.168.8.2?

Unfortunately no, only via 192.168.6.2

giuliomoro

Not sure why the DHCP is not picked up on the host ... try manually setting the IP address for the new interface to 192.168.8.1 (note the .1) and then try to access the IDE ad 192.168.8.2 (note the .2) again.

On the board, ensure when you run ip a you get usb2 with IP 192.168.8.2

FelixDoyon

giuliomoro Not sure why the DHCP is not picked up on the host ... try manually setting the IP address for the new interface to 192.168.8.1 (note the .1) and then try to access the IDE ad 192.168.8.2 (note the .2) again.

How can I do this? I tried those settings but I don't think they are good

giuliomoro

FelixDoyon How can I do this? I tried those settings but I don't think they are good

That looks good , assuming it's done on the "new" interface that only shows up with the USB-A -> USB-A connection.

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