MT4v2 ESP32-S3 IO pins define

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IIC Bus:

SDA:GPIO8
SCL:GPIO18

24C02 EPROM i2c address: 0x50
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PCF8574: i2c address:0x22

PCF8574->P0 (digital input-1)
PCF8574->P1 (digital input-2)
PCF8574->P2 (digital input-3)
PCF8574->P3 (digital input-4)
PCF8574->P4 (digital input-5)
PCF8574->P5 (digital input-6)
PCF8574->P6 (digital input-7)
PCF8574->P7 (digital input-8)


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Ethernet (W5500) I/O define:

clk_pin: GPIO1
mosi_pin: GPIO2
miso_pin: GPIO41
cs_pin: GPIO42

interrupt_pin: GPIO43
reset_pin: GPIO44

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RS485:
RXD:GPIO38
TXD:GPIO39

Tuya module:
RXD:GPIO7
TXD:GPIO6

Tuya network button: Tuya module's P28
Tuya network LED: Tuya module's P16
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1-Wire-TEP1:GPIO40
1-Wire-TEP2:GPIO17
1-Wire-TEP3:GPIO48
1-Wire-TEP4:GPIO47

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433MHz RF receiver: GPIO14
IR receiver: GPIO13

DL(download) button: GPIO0
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ARM CPU RXD: GPIO15
ARM CPU TXD: GPIO16
115200bps
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SD Card:
SPI-MOSI:GPIO10
SPI-SCK:GPIO11
SPI-MISO:GPIO12
SPI-CS:GPIO9
SPI-CD:GPIO5