This is a simple library for writing pixels out to the apa102 over spi on the nodemcu platform. It seems to be capable of pushing data out to 150 pixels, at least.
Usage:
apa102.init()
apa102.write(0xff, string.chr(0x00, 0x00, 0xff))
apa102.init() sets the spi up for sending
apa102.write(int brightness, string bytes) sends out bgr pixels to the apa102 strip, applying a global brightness. The brightness has 5 bits of precision - the three preceding bits have to all be set high (1's). This function interleaves the global brightness value with the color data and pushes it out over spi
PixelController server
It's a bit laggy, but to receive data from PixelController as a "udp" server, do like this:
u = udp_server.new()
u.start()
To use the apa102 build of nodemcu I threw together, see udp_native.lua and tpm2_server.lua. The former is a clone of udp_server.lua, and the latter is a tpm2.net client implementation tested with Jinx! and Glediator using unicast.
udp_native.lua (for PixelController udp)
u = n_udp_server.new()
u:set_brightness(1)
u:start()
tpm2_server.lua (general tpm2.net unicast client)
t = tpm2_server.new()
t:set_brightness(1)
t:start()