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DI1: GPIO15
DI2: GPIO4

RS485:
TXD: GPIO27
RXD: GPIO26

Tuya:
TXD: GPIO14
RXD: GPIO13

analog input: GPIO36

zero_cross_pin: GPIO25
gate_pin: GPIO33

P8 jumper:
R32 short with GND: analog input use for 4-20mA signal
R33 short with GND: analog input use for dc 0-10v signal

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