Technical FAQ

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
Reasons of gibberish are as below: 1.The setting of baud rate, data bits, check bit are not matched between serial device any our converter. 2. Hardware Serial TTL RS232 RS485, they are different level types, cannot be connected directly. Need to be converted via 232 or 485 chip. It is wrong to link TTL to PC
What is FAQ? FAQ is Our company Jinan USR IOT Technology Limited, in order to facilitate users to understand and use my company’s products faster and create plates. We record the solve solutions during we technical support.
Q: Wifi module has no response for a long time,and it must be reset and reconnected. How could this be? A: Pay attention to the design of powe