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+--- Thread: KC868-AK ESP32 I/O pin define (/showthread.php?tid=2401)
KC868-AK ESP32 I/O pin define - admin - 11-20-2022
IIC Bus:
SDA:GPIO4
SCL: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
PCF8574:U58 (DI33-40): 100 110 = 0x26
PCF8574:U32 (DI41-48): 100 011 = 0x23
free GPIO:
GPIO35
GPIO39
GPIO34
GPIO36
-----------------
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
RS232:
RXD:GPIO33
TXD:GPIO32