Technical FAQ

1. Serial device server setup parameters 2. Router setup method Check whether the WAN port to Public IP address 3. Port Forwards port 23419 IP: PC address 4. Computer connected to a wireless router openwrt 5. Check computer’s IP address ( 6. Check computer’s IP address 7. Ethernet Module serial port to connect PC, using
Many user doubt: Why GPRS / GSM modems only can go into a public IP computer? Can it work at a campus network/corporate network? Answer: Yes, it can. But it need cooperate with campus network/corporate network. Detail explanation as below: GPRS / GSM modems connect to network is send a TCP/UDP connection, during connection and communication
SMS DTU transparent transmission mode setting method Set SMS transparent transmission mode two major commands AT+CIMOD=”MOD” Configuration module operating modes: MOD said operating mode, 0 means transparent transmission mode, 1 serial command mode, two said AT command mode, 3 HTTPD Client mode, four said messaging transparent transmission mode. Configuration command: AT + CIMOD = “4”
GPRS modules are connected server setting method 1. Module settings: server address and port 2. Setting method to connect to the server: 3. Server open TCP232-Test software, set up the network protocol for the TCP server.Listen to the local port 25568. GPRS modules to initiate the link to the server,you can see the module launched
1. Router setup method Check whether the WAN port to Public IP address, (WAN IP Address must be a public IP). Port Forwards port: 23419 IP: PC address 2. Set the module parameters 3. Computer connected to a wireless router openwrt 4. Check computer’s IP address 5. Check computer’s IP address 6. GPRS modems
GPRS / GSM modems using the AT commands query version number 1. AT command 2. Use software to set the module Returns the version number: V3.19
1. GPRS Modules Settings check whether the serial parameters of working parameters and the GPRS modules of GPRS modems agreement serial line, check whether it is normal check the line connection is normal check using the serial line sequence, TXD to RXD, RXD to TXD, GND to GND check whether electricity module, check module power
1. Open the software into the AT instruction set 2. Mobile phone card identification: Card not to identify: 3. Connected to the base station Not connected to the base station 4. To connect to the server Not connected to the server
Connect serial of GPRS modules with serial of PC, open USR-GPRS-DTU software to set AT command. 1.Query whether GPRS module can identify SIM card [Send] : AT+CIMI [Receive] : 460001142971927 [Note] : obtain IMSI The command is aimed to reading or identifying IMSI of SIM card 2.Query whether GPRS module can connect to the Internet
1.The product of the USR have AT command mode. If you forget your setting or make a wrong setting, you can enter AT command mode, inquire or change the setting. 2.The diagram of enter AT command is as follow. 3.We use the USR-TCP232-TEST software to send serial command. You can use your own serial software