... spread all over the world.Our strength:1, familiar with MCU, ARM system development process 2, profound knowledge of EMS, which helps ... design, copy and change.5, familiar with the design and application of high frequency wireless communication.6, well know the application of ... GSM/GPRS/CDMA/GPS and short distance wireless communication(2.4g, 433/315mhz)7, familiar with RS485/232,DMX512,CANBUS port and ...