For making dasblinkenlights with a Pi in go.
Run you holiday lights! Make your office-fern all festive or something.
This does all the fancy work of cross compiling for armv7 and linking in ws281x support bindings so you can focus on dasblinken and not dasboilerplate.
With many thanks to https://pkg.go.dev/github.com/rpi-ws281x/rpi-ws281x-go
You probably want to modify the constants in the makefile. The ts auth key is pulled out of the local env. Everything else is hardcoded to values that depend on what you want.
The piled sample app runs as a tsnet client on your tailnet too but you can easily modify it to just run as a normal webserver.
The only support arch is 32 bit armV7. A pi zero 2w running bare bones Rasbian Bookwork (Debian) will get it done.
The default.json config uses GPIO29 or Pin 21 (the last pin on the first row of the header) by default. Often, no level shifter is needed. YMMV, but if you see instability, a 3.3 -> 5V level shifter might be required.
Connect your led strips power to the raw 5v header and ground to ground.
Header (pi 2w pictured):
opgoooooooooooooooos
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p - 5v power (raw from usb)
g - ground
s - signal
Multiple channels might work? It hasn't been tested. 300 led strips seem OK with a decent power supply.
Modify config.json to match your LED strip. The effects package includes a number of effects that will work on strips and matrices.
We assume no responsibility for dasMagicSmoke...
% export AUTHKEY=<an auth key for your tailnet>
% make builder-image
% make all
% make deploy
% make runYou can then http://dasblinken (or whatever you set TSNAME to)
