+- Smart Home Automation Forum (https://www.kincony.com/forum)
+-- Forum: Technical Support (https://www.kincony.com/forum/forumdisplay.php?fid=60)
+--- Forum: B24M (https://www.kincony.com/forum/forumdisplay.php?fid=85)
+--- Thread: B24M ESP32-S3 IO pins define (/showthread.php?tid=8358)
B24M ESP32-S3 IO pins define - admin - 07-31-2025
IIC Bus:
SDA:GPIO8
SCL:GPIO18
PCF8575: (input1-16): i2c address:0x22 by B16-core
P8:input1
P9:input2
P10:input3
P11:input4
P12:input5
P13:input6
P14:input7
P15:input8
P0:input9
P1:input10
P2:input11
P3:input12
P4:input13
P5:input14
P6:input15
P7:input16
U4: PCF8575 i2c address:0x25
P0:input17
P1:input18
P2:input19
P3:input20
P4:input21
P5:input22
P6:input23
P7:input24
P8:output1
P9:output2
P10:output3
P11:output4
P12:output5
P13:output6
P14:output7
P15:output8
U2: PCF8575 i2c address:0x24
P0:output9
P1:output10
P2:output11
P3:output12
P4:output13
P5:output14
P6:output15
P7:output16
P8:output17
P9:output18
P10:output19
P11:output20
P12:output21
P13:output22
P14:output23
P15:output24
24C02 EPROM i2c address: 0x50
DS3231 RTC i2c address: 0x68
SSD1306 display: i2c address:0x3c
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)
-----------------
free GPIOs (without pull-up resistance on PCB):
GPIO13
GPIO14
GPIO21
free GPIOs (with pull-up resistance on PCB):
GPIO40
GPIO48
GPIO47
GPIO7
-----------------
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:GPIO17
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