we have design this ESP32 GPIO board (KC868-A256) for home assistant. It use by ESP32-WROOM-32E, 256CH digial input ports + 256CH MOSFET output ports + 4CH analog input ports + RS485 + Ethernet. The output design by 74HC595 chip. The input design by 74HC165 chip. You can write your own arduino source code for home automation DIY. You can also integrate to home assistant by ESPHome.

We have designed ESP32 IO Expansion (development) Board — KC868-AM (Mini) . it’s ESP32 module + many free GPIOs for home automation DIYer to use. 4 GPIOs in greent terminal already added pull up resistance, so that you can conveniently connect with 1-wire sensor device. some others input GPIOs on the PCB center for user. Support add to home assistant by ESPHome.

Two questions:

1) Is it possible to have an ADC sensor trigger an Input on an A16 with KCS?
2) Will a KC868-HA work with the A16 over RS485?

   

  HA_A256.txt (Size: 74.43 KB / Downloads: 779)

#define ANALOG_A1  GPIO36
#define ANALOG_A2  GPIO39
#define ANALOG_A3  GPIO34
#define ANALOG_A4  GPIO35

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

74HC595 for output:
Data: GPIO5
Clock:GPIO16
Latch:GPIO4

74HC165 for input:

Data: GPIO15
Clock: GPIO32
LD(load_pin): GPIO33

   

esphome:
  name: am

esp32:
  board: esp32dev
  framework:
    type: arduino

# Enable logging
logger:

# Example configuration entry
ethernet:
  type: LAN8720
  mdc_pin: GPIO23
  mdio_pin: GPIO18
  clk_mode: GPIO17_OUT
  phy_addr: 0


switch:
  - platform: gpio
    name: "am-light1"
    pin: 15
    inverted: False


  ESPHome_KC868-AM.txt (Size: 340 bytes / Downloads: 304)

Relay1:15

1-wire GPIO for DS18B20/DHT11/DHT21/LED strip -1: 5
1-wire GPIO for DS18B20/DHT11/DHT21/LED strip -2: 14
1-wire GPIO for DS18B20/DHT11/DHT21/LED strip -3: 13
1-wire GPIO for DS18B20/DHT11/DHT21/LED strip -4: 33

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:35
TXD:32

IIC BUS:
SDA:4
SCL:16

free GPIOs on PCB hole:
I36
I37
I38
I39
I34

KC868-A2 configure yaml for ESPhome by Ethernet or WiFi.
   

  ESPHome_KC868-A2-ethernet.txt (Size: 732 bytes / Downloads: 695)

  ESPHome_KC868-A2-wifi.txt (Size: 875 bytes / Downloads: 484)

Relay1:15
Relay2:2

DS18B20/DHT11/DHT21/LED strip -1: 33
DS18B20/DHT11/DHT21/LED strip -2: 14

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:35
TXD:32

GSM:
RXD:34
TXD:13


DI1:36
DI2:39

IIC BUS:
SDA:4
SCL:16