A 64x64 RGB LED Matrix client which renders images over UDP
Based on the MQTT implementation here: https://github.com/SMerrony/picowpanel -- Thanks!
- Setup the pico-sdk env.
- Create a
builddirectory at root. - Inside
build, runcmake ..to generate cmake targets. - Substitute a
wifi_config.h. - Run
make -j 8to build the firmware. - Upload the firmware to the pico.
Right now we're hardcoded to 64x64 configuration.
The pico will listen for UDP packets that contain the image chunks. A single chunk contains two lines worth of image data, so 128 pixels in total. 128 * 4 (rgba) = 512 bytes of data, the pixels encode raw RGB values.
The packet has first three bytes reserved for control signals. First byte is the offset of the two lines from top, the remaining bytes are unused.
Following python code can be used to publish images to the panel.
import socket
import numpy as np
from PIL import Image
panel_ip = '10.0.1.119'
panel_port = 6002
udp_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
img = np.array(Image.open('test.64x64.png'))
img = img.reshape(64 * 64, 4)
for i in range(0, 64, 2):
a = i * 64
b = a + 128
header = [i, 0, 0] # offset
chunk = img[a:b].astype(np.uint8).flatten().tolist()
payload = bytes(header + chunk)
udp_socket.sendto(payload, (panel_ip, panel_port))