[Datasheet các dòng Module SIM 4G 5G](https://cdn.tdlogy.com/public/Datasheet/4G-5G/)
[USB SIMCOM driver](https://github.com/TDLOGY/SIMCOM_USB_DRIVER)
[AT Command Test cho các dòng Module SIM](https://linhkienthuduc.com/at-command-test-cho-cac-dong-module-sim/)
[Lập trình sử dụng module SIM để gửi tin nhắn và gọi điện](https://linhkienthuduc.com/lap-trinh-su-dung-module-sim-a7680c-a7670c-a7600c-sim7600ce-de-gui-tin-nhan-va-goi-dien/)
Datasheet, reference design và 3d EC800 module lõi: [EC800 design resource](https://cdn.tdlogy.com/public/Datasheet/4G-5G/QUECTEL/EC800_Design_Resource/)
ESP32 PPPOS Arduino (version esp32 in Arduino: 1.0.6): [https://github.com/TDLOGY/esp32\_pppos\_arrduino](https://github.com/TDLOGY/esp32_pppos_arrduino)
ESP32 PPPOS LKTD (esp-idf v4.4): [https://github.com/TDLOGY/esp32\_pppos](https://github.com/TDLOGY/esp32_pppos)
ESP32 SIMCOM Test (SMS/Call): [https://github.com/TDLOGY/esp32\_sim7600x\_arduino\_test](https://github.com/TDLOGY/esp32_sim7600x_arduino_test)
[Application Note](https://cdn.tdlogy.com/public/Datasheet/4G-5G/QUECTEL/Quectel_EC200N-CN%26EC800M-CN_GNSS_Application_Note_V1.0.0_Preliminary_20230207.pdf)