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+--- Thread: KC868-A32 ESP32 I/O pin define (/showthread.php?tid=1771)
KC868-A32 ESP32 I/O pin define - admin - 03-23-2022
#define ANALOG_A1 GPIO39
#define ANALOG_A2 GPIO34
#define ANALOG_A3 GPIO36
#define ANALOG_A4 GPIO35
IIC Bus:A
SDA-A:GPIO15
SCL-A:GPIO13
PCF8574:U16 (relay1-8): 100 100 = 0x24
PCF8574:U32 (relay9-16): 100 101 = 0x25
PCF8574:U58 (relay17-24): 100 001 = 0x21
PCF8574:U59 (relay25-32): 100 010 = 0x22
IIC Bus:B
SDA-B:GPIO4
SCL-B:GPIO5
PCF8574:U14 (DI1-8): 100 100 = 0x24
PCF8574:U31 (DI9-16): 100 101 = 0x25
PCF8574:U56 (DI17-24): 100 001 = 0x21
PCF8574:U57 (DI25-32): 100 010 = 0x22
-----------------
Ethernet (LAN8720) I/O define:
#define ETH_ADDR 0
#define ETH_POWER_PIN -1
#define ETH_MDC_PIN 23
#define ETH_MDIO_PIN 18
#define ETH_TYPE ETH_PHY_LAN8720
#define ETH_CLK_MODE ETH_CLOCK_GPIO17_OUT
--------------------
RS485:
RXD:GPIO16
TXD:GPIO14
Extend serial port (3.3v TTL level):
RXD:GPIO33
TXD:GPIO32