network rep : cyclone tcp : https://oryx-embedded.com/products/CycloneTCP
sip rep : pjsip : https://www.pjsip.org/
rtos : freertos and posix : https://www.freertos.org/
hardware : openedv Apollo : http://47.111.11.73/docs/boards/stm32/zdyz_stm32f429_apollo.html
Complier : MDK AC6