2-Way Ethernet Delay Relay Module DC5V TCP/UDP Controller Module Network Switch WEB Server
Five reasons to choose the SR-201 series IoT module:
1. Industrial grade STC microcontroller+ENC28J60+stable firmware, supports 6 network connections in TCP server mode, and also provides UDP control mode and cloud remote control function
2. The control command is very simple. In string mode, send 11 to turn on the first relay, send 21 to turn off the first relay, 11 * command to jog the first relay, 11K command to simulate the first local button (only for models with local buttons), 11:10 to turn on the first relay for 10 seconds and automatically close it (with a delay support of 1-65535 seconds); Send 00 to return all channel statuses
3. Comprehensive support for secondary development, with demonstration programs and source code available for local connectivity, cloud remote control, PC, and mobile devices. The latest module configuration program and timing program DLL encapsulation are available for easy integration of various configuration functions
4. Hardware is scalable, and the pins on the module can connect to real-time clock, 485, Bluetooth, 2.4G
5. The 8-bit streamlined instruction system has powerful functions, low development costs, and highly cost-effective customization of functions
Module features:
Industrial grade STC microcontroller as the main control chip
On board 2-way high-quality relay with absorption diode circuit
Equipped with 1 power indicator light, each relay has a status indicator light, and the relay is engaged when the light is on
The relay module can be further extended to achieve 8 outputs. Note: The relay module should be effective at high levels
Module parameters can be configured through the network, such as module IP address, default gateway, etc
Maintain relay status before power failure (configurable)
Through internet control, cloud remote control is protected by local passwords, ensuring security and reliability
Supports input voltage of 5-24V, with two power terminals to choose from
The 1.6mm thick PCB is made of military grade FR-4 board, with a PCB size of 70mm X 50mm and reserved installation holes
The module factory settings are:
IP address 192.168.1.100 Network parameters can be configured through the network
Default gateway 192.168.1.1
Subnet Mask 255.255.255.0
The service port of TCP port 6722 module cannot be configured
UDP port 6723
You can configure the module parameters through the network, and the configuration interface is as follows. When incorrect network parameters prevent the configuration tool from connecting to the module, short circuit the CLR jumper and power on the module to restore the factory settings.
 
In TCP mode, each time the module receives a command byte, it will return the current relay status. A text string with a return value of 8 characters, each character may be 0 or 1, representing the relay release or engagement status. For example, a return value of 11000000 indicates CH1 and CH2 engagement, while other channels are in the released state.
The delay parameter can be set to change the state of the controlled channel after 1-65535 seconds. Combined with specific applications, it can achieve delayed opening after release or delayed closing after suction. The writing method for delay parameters is to continue entering ":" and the number of delay seconds after the command code, such as:
Interface Description:
+5V:+5V power supply positive pole, input or output
GND: Power ground, input or output
P30-P35: CH3-CH8 control line, effective at high level
CLR: Short circuit CLR and power on the module to restore factory settings
Blue terminal: Connected to user load, can use 220V AC equipment or DC equipment less than 30V, and the current of the equipment cannot exceed the standard load of the relay. Each relay has one normally open contact, one normally closed contact, and one common contact. When the relay is engaged, the common contact and normally open contact conduct; When the relay is released, the common contact and normally closed contact conduct.
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