The uploaded program is the control program of SIM900A, and the MCU is 51 series
download times 5 type Source Code uploaded 2015-02-12
The identification and marking methods of resistors are introduced in detail
download times 0 type Application Documents uploaded 2014-02-20
The article describes the two protocols very clearly, which is helpful for everyone to learn
download times 0 type Application Documents uploaded 2013-07-06