kc868-h8 Smart Home Automation

KC868-H8 is a smart home automation that remote control relay by network. It can used by mobile phone APP or PC computer or PAD.
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relay control relay remote control

relay control diagram

KC868-H8 Interface Definition Diagram

relay control light

KC868-H8 Application Solution -- Smart Lighting Control

solid stare relay

If the load is larger than 2000W, the power expansion can be achieved by using solid state relay. Its working principle is as follows:

relay control solid state relay

relay control app

This is PC software for KC868-H8, It can control by LAN (local control) or WAN (remote control)



This is config manu, The title and copyright and all relays' name can be changed by yourself.

relay control software

3 styles skin can be use to see.


8 channel relay controller (Ethernet) Users manual

Products Parameter:

Dimension:      148x117x40mm

Working Voltage: DC 12V

Material:Fire resistance ABS、metal shell

Working Temp: -20℃~70℃

Working Humidity: 20%RH ~ 80%RH

Output Load:each 250V/10A
Communication mode:Ethernet/RS232

Input port qty:8 ports

Output port qty:8 ports

Output power:12V/9V


Products Function:

1. Supporting RS232 and Ethernet communication mode

2. Remote controlling the opening/closing of 8 routes or 8 groups’ circuits.

3. Supporting 8 ports input of sensor switching value.

4. Supporting secondary development

5. Supporting APP remote controlling

6. Widely used for lights controlling of kinds of occasion (like Indoor, theater or Amusement Park etc) and switching of mechanical equipments, and management of the computers in the cyber bar and so on.


Products Features:

1. Highly reliable connection column, independent and isolated route,Make sure the products more stable and safe.

2. Relay output pole connection method as shown below, each color represents one route, each route is equal an independent switch.


3. Adopting ARM core chip as the core processor, industrial stability and good

4. Professional shell design, fixed through the positioning hole, or fixed on the guide

rail directly.
5. Perfect power input filter, ensuring adequate capacitance.
6. Adopting advanced and stable communication protocol, providing reliable and smooth communication procedures.
7. Providing the upgrade tool, the products can be upgraded by the users;

Or can be upgraded by the device supplier through the network.

8. Providing 1 year technical maintenance and free new edition host computer software


Products Usage Instructions

Wiring and Installation

1. Connecting network line or RS232 serial port

light control

2. Connecting the lamp and power into the corresponding output pole, according to      below diagram.

3. When need to control one group or groups lights, connecting the line into the

corresponding output poles.

4. Connecting the 12V power adapter to charge

5. When the detection sensors are available, connecting them into the input port.

Software Operation

1. Opening the network debugging tool to detect the IP address and port of     the device (see below figure)


2. Clicking【Device】, see below figurenet-config

3. Double clicking 【the Name】, set up the network parameter of the devicenet-config

4. Choosing the working mode, TCP is for local area network setting or secondary  development; UDP is for APP controlling.

5. Opening 【Relay】software, inputting IP address and port, clicking 【connecting】(see below figure)


6. It’s 8 ways, choosing 8 output is ok.


Secondary Development Communication Protocol

1. Relay Controlling(SET):


RETURN: RELAY-SET-x(1bytepack_num),x(1byterelayserialnumber),x(1byteaction0/1),



2. Relay Status(READ):


RETURN: RELAY-READ-x(1bytepack_num),x(1byterelayserialnumber),x(1bytestatus0/1),OK/ERROR

3. Input Status(GET_INPUT):


RETURN: RELAY-GET_INPUT-x(1bytepack_num),x(1bytestatus),OK/ERROR


4. Trigger Alarm(ALARM):



Re: Without receiving the RETURN, ALARM will be re-triggered every 3 seconds, totally re-triggered 3 times.


5. Scanning(SCAN_DEVICE):




6. Serial Number acquisition(HOST):

RELAY-HOST-NOW(under TCP working mode)

RETURN: HOST-CHKLIC-97813679bd8cc4c42ddb6c27(return host serial number)


7. Relay Groups Controlling(SET_ALL):


RETURN: RELAY-SET_ALL-x(1bytepack_num),D0,OK/ERROR


8. Relay Groups Status(STATE):


RETURN: RELAY-STATE-x(1bytepack_num),D0,OK/ERROR


9. Status Testing(TEST):



Re: under this status, the pack_num isn’t working.


Secondary Development Program Toolkit

We supply complete source program Toolkit of VS2005(Microsoft Visual Studio 2005) , and we give the controlling examples through RS232 serial port and Ethernet socket,to help customers carrying on the secondary development.


The upper monitor can control the relay switch, and also show the input state.Details showed from below screenshots.

relay-control-vb2017 relay-control-vs2005 relay-control-vs2017

We can supply the DEMO code of C++Builder, Delphi, VB.Net, Python and iOS versoins.

This is a Hello World hareware verion of Demo code.

demo-light demo-delphi

Follows are our demo video on youtube can help you(The video is KC868-H32 for 32 relays. Because of  KC868-H8 and KC868-H32 using the same communication protocol, so you can refer to the videos below. KC868-H8 have 8 relays, KC868-H32 have 32 relays):video_demo_vb

view video on this page: https://youtu.be/bzGqjfezX74 video_demo_app

view video on this page: https://youtu.be/hPWLbGwdGmMvideo_demo_protocol

view video on this page: https://youtu.be/RVWvRN8yKWsvideo_demo_switch_1

view video on this page: https://youtu.be/QM8E4NF2NNEvideo_demo_switch_2

view video on this page: https://youtu.be/HlxVVIB2yXkvideo_demo_module_pc_control

view video on this page: https://youtu.be/mcVRVmfB2tEvideo_demo_module_app_control

view video on this page: https://youtu.be/Lu1F06ZosCU