LTE 4G To WIFI IOT Router Modbus Io Remote Control Gateway With Lan Port

Product Introduction of IOT Router ZHL4921G

ZHL4921 is a multi-interface wireless gateway developed by Chengdu Zongheng Intelligent Control Technology Co., Ltd. based on QuecOpen, and it also has powerful RTU functions. Using embedded Linux system development, embedded 256MB RAM and 256MB Flash, support 4G wireless network high-speed transmission. Cover most common application scenarios.

• Parameter of IOT Router ZHL4921G

Features of IOT Router ZHL4921G

Support NTP function, realize automatic network time calibration
1 channel 100M industrial Ethernet interface
1 RS485/RS232 serial interface
Interface: AI*1/ DI*2/ DO*1
Support MODBUS RTU and MODBUS TCP protocol adaptation
Support setting the direction of active data reporting
Support TCP_Client, MQTT, HTTP_Client
Interface: AI*1/ DI*2/ DO*1
Support two working modes: master mode, slave mode, master mode supports cascading multiple Modbus devices
Internal self-inspection mechanism to ensure stable operation of equipment
Support cloud forwarding, cloud networking
Support network port, WIFI, remote, serial port configuration
Multiple indicator lights show working status
Support domain name address resolution
Support setting APN
Operation log save and download when power off
Support SIM card number query
Support custom heartbeat package
Support multiple registration packages (ID, CCID, custom) to ensure the legality and uniqueness of the device identity
Support WIFI hotspot/GPS positioning
Support 10*10KB network/serial data buffer
Support timing flip relay status

Reconnection Mechanism

Function description: When the device is in TCP_Client/MQTT mode, this mechanism can be enabled to protect traffic.

In actual applications, you may encounter remote server abnormalities or business needs that cause frequent disconnections. In order to ensure that the ZHL4921 is always online, it will continue to try to establish a connection, which will cause unnecessary traffic consumption. When disconnected, ZHL4921 will first try to connect according to the "reconnection times". If the connection is still not confirmed, ZHL4921 will enter the waiting state, and the waiting time is the set "interval between reconnection tasks". After the waiting time expires, ZHL4921 will try to establish a connection again.