Dear friends, I want to interface GPRS module(Quectel UG95) with ATSAME54P20A microcontroller using PPP protocol (compiler is AtmelStudio 7) for data communications. I completed until packet interaction and now I dont know how to do packet interaction, more specifically LCP negotiations, AUTH negotiations, IPCP negotiations. Can you help me to complete this part? I want microcontroller to get IP and DSN and start data transmisson. Some useful materials are given in the links below.