Espruino with Glediator & LED matrix

So it works if you lower the data rate? Is it possible to just lower the Baud rate on Serial then?

Also, if you remove the print statements, that should help a lot.

The Pico has a 512 byte input buffer I think - I guess it's possible that so much data is arriving while the last data is being sent to the LEDs that it gets full up...

150 pixels * 24 bits = 3600, and each bit takes 1.25us to send, so that's 4.5ms. If you're receiving data at 1000000 baud then that's 100,000 bytes/sec, so in 4.5ms you're receiving 450 bytes.

Add some overhead for executing JS and you're dangerously close to overflowing that buffer... So the solution would either be to:

• Reduce the baud rate
  
• Somehow ensure that the transmitter left a gap in transmission while data was being sent to the LEDs.
  
• Compile your own Pico firmware with a larger input buffer (without actually making big changes, you could get up to 1024 bytes).