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nodemcu: connect D4 to TX
	D7 to RXD (the pin that transmits, weird, right?) of UART-RS485
	G to GND of UART-RS485
	3V to VCC of UART-RS485
plug in nodemcu to computer via usb
pio run --target upload

SLIP:
slattach -vdp slip -s 115200 /dev/ttyUSB0
ifconfig sl0 up
ip addr add dev sl0 2.0.0.1/8
use artnet on 2.0.0.1 as input in qlc+, set in artnet config universe to 0, instead of default 1

WIFI:
add #define DO_WIFI to source and change ssid to connect to in setup()
use artnet on wifi iface as input in qlc+, set in artnet config universe to 0, instead of default 1

hacks:
connect D6 to GND to enable flash suppression hack - flash (dmx 255) will be replaced with the last known value instead