Abstract: SMS short message service, as a basic service of GSM network, has been paid more and more attention by system operators and system developers. With GSM network as data wireless transmission
Many people may not be able to live without WIFI! This is a bit of an exaggeration, but WIFI has indeed deeply penetrated into the lives of young people. Don't worry about this, because WIFI is likely
Whether digital or analog, data must be converted into signals for the purpose of transmission. The process of converting data into analog signals is called modulation, and the process of converting d
Help, we are working on a project, using STM32F103C8T6, SIM800C 2G network, RC522 on the motherboard for radio frequency identification, currently 120 have been produced, more than 70 have been put in
If you connect it directly to a 220v plug and turn on multiple electrical appliances at the same time, how can you distinguish the characteristics of voltage and current? . . .
We all know that even if the silicon is 100% perfect, if any one component of the chip-to-chip communication link (such as the package, connector or circuit board) is damaged, the target system may st