Features: This 2-Way, 10A relay controller has normally open and normally closed output, which can be used in smart home control, secondary development of mobile phone or computer remote control lights, motors and other electrical equipment. Dependable network connection, dependable restore network connection, can remote control cross gateway. This product uses 5V power supply, with two-way relay normally open output, without normally closed output. It supports TCP protocol and supports four network connection in the TCP server mode. Supports working in TCP server, TCP client, and UDP mode. Supports user-defined name, no need to record IP number when there are many equipment. Specifications: Size: 7.7*4.75cm/2.7*1.8in Application: 1. Can be used in smart home control, control router to restart when network is off. 2. Can be used for secondary development of mobile phone or computer remote control lights, motors, and other electrical equipment. 3. Can be used in computer room power failure detection, can be connected to human body infrared sensor, button switch and smoke alarm output. 4. Can be used for access control system, control computer to turn on, and remote control electric appliance. 5. Can smoke alarm output, can meet the human body infrared detector output, 6. Can pick button switch, can pick up any passive switch input, and can also meet the active switch input (connect 5 v active switch amount). 7. Can control by external network, mobile phone remote control (mobile phone APP should developed by yourself). Control Command: Send: on1 is to open the first way relay, Send: off1 is to close the first way relay;Second way control method is the same. Send: read1 is to read the first relay state. If back to on1, it means the first way relay is energized. Back to off1, it means the first way relay is dis-energized. Support time delay control, for example, Send: no1:02 means relay is energized for 2 seconds then dis-energized, sent on: 12 means relay is energized for 12 seconds then dis-energized, The longest time delay in 99 seconds. TCP 01 opcode This opcode is reading relay status, relay address:The first way 0010, the second way 0011. 05 opcode This opcode is to control single relay, relay address:The first way 0010, the second way 0011. 0F opcode This opcode is to control two relays, relay address:The first way 0010, the second way 0011. Package Includes: 1 x Relay Controller .