Is the LTE Cat 1 module like the GPRS module, which can be used by simply inserting a common SIM card? Or does it require the cooperation of the operator to activate it like the NB-IOT module?
How to use gpio32 and gpio33 as UART? Now I can only find one serial port in /dev, serial0, which is the serial port corresponding to GPIO14 and 15. I can't find the corresponding one for 32 and 33, a
The concept of synchronization
Synchronization technology is a very important technology in digital communication systems. Generally speaking, digital communication systems must implement multiple syn
The sensor of the test system is subject to electromagnetic interference from the object being tested - an electric motor with a rotation speed between 1 and 30 Hz. The output of the sensor is an alte