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+--- Thread: DM4 ESP32-S3 IO pins define (/showthread.php?tid=8993)
DM4 ESP32-S3 IO pins define - admin - 02-03-2026
SDA:GPIO8
SCL:GPIO18
PCF8574: (input1-4): i2c address:0x24
P0:input1
P1:input2
P2:input3
P3:input4
ADS1115 (4CH ADC): i2c address:0x48
Analog input (A1: DC 0-5v)
Analog input (A2: DC 0-5v)
Analog input (A3: DC 4-20mA)
Analog input (A4: DC 4-20mA)
24C02 EPROM i2c address: 0x50
DS3231 RTC i2c address: 0x68
MCP4728 DAC i2c address: 0x60
1-wire (pull-up resistance on PCB):
1-wire1:GPIO47
1-wire2:GPIO48
1-wire3:GPIO17
1-wire4:GPIO40
free GPIOs:
GPIO13
GPIO14
GPIO21
-----------------------
Ethernet (W5500) I/O define:
clk_pin: GPIO1
mosi_pin: GPIO2
miso_pin: GPIO41
cs_pin: GPIO42
interrupt_pin: GPIO43
reset_pin: GPIO44
--------------------
RS485:
RXD:GPIO38
TXD:GPIO39
Tuya module:
RXD:GPIO15
TXD:GPIO16
Tuya network button: Tuya module's P28
Tuya network LED: Tuya module's P16
SD Card:
SPI-MOSI:GPIO10
SPI-SCK:GPIO11
SPI-MISO:GPIO12
SPI-CS:GPIO9
SD-Detect: GPIO5