ESP32-S3 2 channel relay module – KC868-A2v3

KinCony KC868-A2v3 ESP32-S3 smart controller based on ESP32-S3-WROOM-1 (N16R8) wifi chip. It have 2 channel digital input and 2 channel relay output, 2 channel 1-wire GPIOs, 4 free GPIO on PCB beside ESP32-S3 module. One SD card using SPI bus. KinCony KC868-A2v3 include DS3231 high precision RTC clock chip. LCD display will show wifi and ethernet IP address. A2v3 have RS485 port and SIM7600E 4G or SIM800L 2G module socket. You can write any code by Arduino IDE / MicroPython / ESP-IDF development tool to ESP32S3 module. We will supply Arduino / ESP-IDF demo code for different samples. Everyone can modify and change the code for your own smart home automation system project. it support use by ESPHome for home assistant or tasmota firmware for smart home automation DIY. A2v3 use KCS v3 firmware, it support home assistant auto discovery function by MQTT, so without write any config code (zero code) for home assistant. KCS v3 support Apple HomeKit.

Model No. KinCony KC868-A2v3
Description: KinCony 2 Channel ESP32-S3 Relay Controller – A2v3
Power supply: 12/24V DC
Processor: ESP32-S3-WROOM-1 (N16R8)
PCB Size: 87mm*93mm
interfaces: Ethernet(RJ45)-LAN 100Mbps IPv4/IPv6,WiFi,RS485,Bluetooth,USB-C,LCD, i2c extender
RTC: DS3231 high precision chip (battery socket on PCB)
SD Card: SPI bus
Installation method: DIN RAIL (with plastic shell)
LCD: SSD1306 I2C display

Outputs:
2CH Relay Outputs, every channel relay’s load MAX250V10A COM,NO,NC

Inputs:
2CH dry contact inputs (optocoupler isolation, long distance circuit for MAX 500 meters cable)
2 buttons: S1:ESP32 Reset S2:ESP32 Download (GPIO0)
1-Wire GPIO: 2CH (with pull-up resistance on PCB)

improvements based on old KC868-A2:

1. use by ESP32-S3-WROOM-1 (N16R8) big memory size chip.
2. add NTC power protect circuit, if polar exchange will not burn board.
3. replace LAN8720A with W5500 ethernet chip, more stable.
4. add DS3231 high-precision RTC clock.
5. support KinCony new cloud service.
6. support KCS v3 support Apple HomeKit and Loxone Miniserver system.
7. add SSD1306 LCD display
8. add SD card to save LOG
9. support KCS v3 newest firmware more powerful functions.

software solution:

1. download KinCony KCS v3 firmware, so that work with multi protocol: HTTP, MQTT, TCP, RS485 modbus, Tuya app (need to buy tuya license), config OUTPUT for “momentary” and “interlock” group functions. “KCS” v3 support IFTTT function work locally without internet. It also support use by KinCony cloud server. KCS v3 support home assistant auto discovery function by MQTT, so without any config file for home assistant.

2. download firmware by ESPHome, integrate to home assistant or use by web service.

3. download tasmota firmware.

4. write your own Arduino code for your own requirements.

5. It is recommended to use home assistant and Tuya mobile phone app at the same time. So that remote control by internet using Tuya app, local control by LAN using home assistant app.

Related technical information
———————————
ESP32 I/O pin define: https://www.kincony.com/forum/showthread.php?tid=7958
KCS v3 firmware download: https://www.kincony.com/forum/forumdisplay.php?fid=75
config yaml file for ESPHome: https://www.kincony.com/forum/showthread.php?tid=7959
ESPHome official supportted list:
arduino demo source code: https://www.kincony.com/forum/forumdisplay.php?fid=77
KCS v3 firmware online guide: https://www.kincony.com/how-to-use-kcsv3-firmware-esp32-board.html

Design detail photos:

input terminal is removable.

use by ESP32-S3-WROOM-1U (N16R8) big memory size chip.

CR1220 3V battery work with DS3231 RTC chip.

free GPIOs on PCB.

i2c extender connect with i2c devices.

MAX 10A/277VAC

SD Card with SPI bus.

SSD1306 i2c LCD

W5500 high quality ethernet chip.


GSM module socket for 4G or 2G GSM module.

plugin 4G SIM7600E or SIM7600G 4G+GPS module

plugin 2G SIM800L 2G GSM module