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+--- Thread: KC868-A128 ESP32 I/O pin define (/showthread.php?tid=2113)
KC868-A128 ESP32 I/O pin define - admin - 08-04-2022
#define ANALOG_A1 GPIO39
#define ANALOG_A2 GPIO34
#define ANALOG_A3 GPIO36
#define ANALOG_A4 GPIO35
IIC Bus-1:A
SDA-A:GPIO5
SCL-A:GPIO16
PCF8575:U144 (relay1-16): 100 100 = 0x24
PCF8575:U146 (relay17-32): 100 101 = 0x25
PCF8575:U148 (relay33-48): 100 001 = 0x21
PCF8575:U150 (relay49-64): 100 010 = 0x22
PCF8575:U280 (relay65-80): 100 110 = 0x26
PCF8575:U282 (relay81-96): 100 111 = 0x27
PCF8575:U284 (relay97-112): 100 000 = 0x20
PCF8575:U286 (relay113-128): 100 011 = 0x23
IIC Bus-2:B
SDA-B:GPIO15
SCL-B:GPIO4
PCF8575:U143 (DI1-16): 100 100 = 0x24
PCF8575:U145 (DI17-32): 100 101 = 0x25
PCF8575:U147 (DI33-48): 100 001 = 0x21
PCF8575:U149 (DI49-64): 100 010 = 0x22
PCF8575:U279 (DI65-80): 100 110 = 0x26
PCF8575:U281 (DI81-96): 100 111 = 0x27
PCF8575:U283 (DI97-112): 100 000 = 0x20
PCF8575:U285 (DI113-128): 100 011 = 0x23
-----------------
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:GPIO13
TXD:GPIO14
Extend serial port (3.3v TTL level):
RXD:GPIO32
TXD:GPIO33