1. Product Overview
The KinCony KC868-A2 is an ESP32-based 2-channel relay controller designed for smart home automation and IoT projects. It features an ESP32 WiFi chip and offers multiple communication options including Ethernet (LAN), RS485, and optional 2G/4G GSM module support via SIM card. This board is highly versatile, allowing users to write custom code using Arduino IDE or integrate with popular home automation platforms like ESPHome and Tasmota firmware.
The board includes two relays, GPIOs for temperature and humidity sensors, and an I2C extender for additional sensor integration. Its pluggable design ensures easy installation and maintenance, making it suitable for various applications from manual lamp control to agricultural temperature and humidity detection.
2. Safety & Warnings
Read all instructions before use. Failure to follow these instructions may result in damage to the product or personal injury.
- Warning: Keep the device and its cord out of reach of children under 3 years old.
- Keep away from children unless supervised by an adult.
- Do not use this product for purposes other than its intended use.
- Inspect the product before each use; do not use if damaged.
- Follow installation and operation guidelines to avoid injury.
- Do not expose to water or moisture.
- Handle with care to avoid cuts or injuries.
3. Specifications
| Parameter | Value |
|---|---|
| Model No | KC868-A2 |
| Description | KinCony 2 Channel Relay Controller - A2 |
| Power Supply | 9-24V DC |
| Processor | ESP32-WROOM-32E |
| Size | 92mm*86mm |
| Interfaces | Ethernet(RJ45)-LAN 100Mbps IPv4/IPv6, WiFi, Bluetooth, 2G/4G GSM module, RS485, USB, Digital input, IIC extender |
| Outputs | 2 Digital Outputs (relay1-relay2), every channel have "COM,NO,NC" 277VAC 10A 125VAC 12A |
| Inputs | 2 channel dry contact inputs 2 buttons: Reset and Download 2 1-Wire GPIOs: for temperature and humidity sensor |
| State of Assembly | Ready-to-Go |
| Certification | CE, FCC, RoHS, UL, WEEE |
4. Setup & Installation
The KC868-A2 board is designed for easy setup and integration. It supports a pluggable design for terminals and optional modules.
4.1 Power Supply and Connections
Connect a 9-24V DC power supply to the designated terminal. The board features a USB Type-C port for programming and power. RS485 terminals (A and B) are available for serial communication. GPIOs are provided for connecting temperature and humidity sensors, and two digital input channels are available for external triggers.
4.2 Optional GSM Module Installation
The KC868-A2 supports either a 4G SIM7600 module or a 2G SIM800L module for GSM communication. Only one module can be installed at a time. Simply plug the desired module into the dedicated socket on the board and insert your SIM card.
4.3 Enclosure Installation
The board can be easily installed into a plastic enclosure, which also supports DIN rail mounting. Simply remove the pluggable terminals, place the board into the enclosure, and re-attach the terminals.
5. Operating Instructions
The KC868-A2 offers multiple ways to control your devices and integrate into smart home systems.
5.1 Phone App Control
Control the relay board using a dedicated phone application. This allows for convenient remote operation of connected devices.
5.2 Smart Control Options
The board supports various smart control methods, including RF remotes, Amazon Alexa speakers, Apple Homekit, and KinCony's KBOX phone app.
5.3 GSM Module Control (SMS/Call)
When using a GSM module, you can control the A2 board by phone call or send data via SMS to users. This is useful in remote locations or in case of Ethernet or WiFi connectivity failure.
6. Advanced Features & Programming
The KC868-A2 is an open-source friendly device, allowing for extensive customization.
6.1 Home Assistant Integration (ESPHome/Tasmota)
The board supports ESPHome and Tasmota firmware, enabling seamless integration with Home Assistant for advanced automation and control.
6.2 Arduino IDE Programming
Users can write their own Arduino code for custom functions, leveraging the ESP32 module's capabilities. KinCony provides demo code for various samples.
6.3 Digital Input Optocoupler Isolation
The digital inputs feature optocoupler isolation, providing anti-interference capabilities, wide voltage support, and enabling long-distance connections.
7. Maintenance
After use, turn off the device and store it in a dry place. Keep away from children.
8. Troubleshooting
If you encounter issues with your KC868-A2, consider the following:
- Power: Ensure the power supply is within the 9-24V DC range and properly connected.
- Connections: Double-check all wiring, especially for relays, sensors, and communication interfaces (Ethernet, RS485).
- Software/Firmware: Verify that the correct firmware (ESPHome, Tasmota, or custom Arduino code) is uploaded and configured properly. Refer to the online resources for guidance.
- GSM Module: If using a GSM module, ensure the SIM card is correctly inserted and has an active plan. Check for network signal strength.
- Reset: Utilize the onboard reset buttons (S1 Reset, S2 Download) if the device becomes unresponsive.
9. User Tips
- The KC868-A2 is highly versatile due to its multiple communication methods (RS485, Ethernet, 4G/2G modules) and support for various sensors, making it suitable for complex automation tasks.
- Leverage the ESPHome and Tasmota firmware support for easy integration with Home Assistant, simplifying smart home setup.
- For remote control without internet, utilize the GSM module for SMS or phone call commands.
- Explore the provided demo code and open-source nature to customize the board's functionality to your specific needs using Arduino IDE.
10. Support & Resources
For further assistance and detailed guides, please refer to the following resources:
- Online Video Guides: KinCony YouTube Channel
- Technical Support Forum: KinCony Forum
- KinCony Engineer WhatsApp: +86-15381188302
- Firmware Download & Online Guide:
- PDF User Manual: A detailed user manual in PDF format is available for download. Please refer to the provided link in the product description for access.