1. GPRS Module Settings a. Check whether serial parameter conforms to working parameter of GPRS module b. Check whether your serial line is OK c. Check whether line connection and slots are OK d. Check extending line is cross line or straight-through cable, and make sure signal transmission direction is right between PC serial and
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