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ET7138 RFID GPRS Embedded Wireless Module
Support GPRS/SMS
TAG Data Buffer
Provide GPRS Connection
Industrial Design
Watchdog inside
SMS Backup tunnel
Clock synchronization
  • Function
  • Specifications
  • Typical applications


1. General

Radio Frequency Identification RFID is the acronym for radio frequency identification, commonly known as RFID. Radio Frequency Identification RFID is a non-touch automatic identification technology, radio frequency signal through the automatic target recognition and access to relevant data, to identify without human intervention, it can work in a variety of harsh environments. RFID technology can identify the high-speed moving objects, also identify multiple tags, the operation is quickly and conveniently.

Shenzhen eTel technologies co., ltd. according to market demand of the wireless internet of things GPRS RFID, develop ET7138 RFID GPRS Module, it able to real time send RFID TAG information via the GPRS network to data center. Data center platform will receive the data and save into database, users can just use browser to access data and view all information.

ET7138 RFID GPRS module is mainly applied to RFID TAG information send to center via GPRS network, it help user make minimizes R&D, and providing stable, high-speed wireless transmission channel.

2. Feature

·           Industrial Design

ET7138 GPRS Module is industrial design which built-in watchdog chipset to ensure the system work continuously, Watchdog monitoring the GPRS module and CPU all the time, if the GPRS module or CPU does not response for long time, Module will restart automatically. Module is very suitable for long-term continuous work applications.

·           Main and backup data center

ET7138 GPRS Module support main and backup data center, user can set both main data center IP address or domain name, when Module  fail to connect with main data center, it will try to connect backup data center automatically.

·           TAG buffer

ET7138 GPRS Module can save the TAG card information in the NVRAM buffer, if the GPRS network is abnormal, the Module will save data in the NVRAM, when the network returns to normal, the data will be sent immediately. NVRAM has feature for save data even power lose, so even Module power lose, Tag data will still save in the NVRAM. Reader buffer can save max 2000 TAG information.

·           TAG Packet Series Number

All TAG data packet include serial number, Data center need to reply a corresponding serial number of the ACK packet after received TAG packet, Modules receive the ACK packet, then delete the TAG information from the buffer, otherwise it will resend TAG packet (as specified time interval and frequency). This feature is based on the GPRS network feature, to ensure TAG data doesn't lose.

·           SMS Remote Restart

ET7138 RFID GPRS Module supports SMS remote control, users can query the device working status through SMS, and also user can reboot Module through SMS.

·           DO port programmable output

ET7138 RFID GPRS Module DO (digital output) port supports programmable output, according to the requirement of user site, the level of output level, switching time, times would be programmable.

·           Clock synchronization

ET7138 Module support clock synchronization; it can read the clock from SMS or get clock from management platform by GPRS.

·           Graphical configuration software

ET7138 RFID GPRS Module provides full graphical software configuration, easy to use, and supports import or export configuration file; so users just simply click a few icons to quickly setup RFID system.