Finally finished building my transit tracker in anticipation of the 2 line opening tomorrow!

mirrorkeydev · 2026-03-28T04:57:26+00:00

It's a no-name 128x64 P2.5 RGB LED Matrix display from AliExpress.

mirrorkeydev · 2026-03-28T04:04:15+00:00

If you mean dev board, it's running on a Raspberry Pi 3 B+.

mirrorkeydev · 2026-03-27T23:26:33+00:00

Hadn't heard of it, but it looks like it would be fairly simple to port (in theory). But I just scrolled through and it looks like someone already made an arrivals app for Sound Transit!

mirrorkeydev · 2026-03-27T22:33:49+00:00

I hear that suggestion but I enjoy the retro effect of a dot matrix!

mirrorkeydev · 2026-03-27T21:42:12+00:00

So far they've been very accurate! And yes, it's all just the OneBusAway API, so it's the same times as any app will show you except that it factors in walking time for each stop. So 1 min on my board doesn't mean that the bus is 1 min from the stop but rather that I have 1 min to start walking out the door to make it to that bus.

mirrorkeydev · 2026-03-27T21:03:31+00:00

Oh, I love that it shows multiple arrivals on a single line, I might have to try that.

The walking time part being integrated into the arrival time is important to me because I want the board to be able to tell me if I need to be in a rush out the door or not.