knifa / led-matrix-zmq-server Goto Github PK

Hi @Knifa

Thank you for your work on this. I'm new to everything here, but I think I am close to understanding zeroMq w/ rpi-rgb-led-matrix.

I'm not sure how the server is sending the frames. Could you please show example of server API and how you send the byte frame from another rpi?

Cheers!

Hello,

I've setup a PI4 along with 2x 128x64 panel. Everything works fine with the included tools, but I can't send images of more than 32767 in size. The server doesn't even react.

Here is an example of a 32767 frame:

pi@raspberrypi:~/led-matrix-zmq-server/bin $ sudo ./led-matrix-zmq-server --led-cols=128 --led-rows=64 --led-chain=2 --led-slowdown-gpio=3
Listening on tcp://*:42024 @ 24BPP
Frame dimensions: 256x64
Expected frame size: 49152 bytes
Frame size mismatch! Expected 49152 but got 32767

And a 32768 frame:

pi@raspberrypi:~/led-matrix-zmq-server/bin $ sudo ./led-matrix-zmq-server --led-cols=128 --led-rows=64 --led-chain=2 --led-slowdown-gpio=3
Listening on tcp://*:42024 @ 24BPP
Frame dimensions: 256x64
Expected frame size: 49152 bytes

As you can see no error message.
I can do some tcpdump/wireshark if needed.

I also tried to change the type to unsigned int here:

unsigned int frame_size = zmq_sock.recv(&frame, expected_frame_size);

But it didn't help.

Any idea?

Thanks!