IoT USB Modem

This component using ESP32-S2, ESP32-S3 series SoC as a USB host to dial-up 4G Cat.1 through PPP to access the Internet, with the help of ESP32-Sx Wi-Fi softAP function, share the Internet with IoT devices or mobile devices. Realize low-cost "medium-high-speed" Internet access.

Features Supported:

• Compatible with mainstream 4G module AT commands
• USB PPP dial-up
• USB Dual Interface
• Network self-recovery
• Wi-Fi hotspot

Supported 4G Cat.1 Module:

Secondary AT Port can be used for AT command when main modem port is in ppp network mode

There are different sub-models of the above modules. The communication stands may be different. For example, LTE-FDD 5(UL)/10(DL), LTE-TDD 1(UL)/8(DL). And endpoint address may different also, if you encounter problems, try modifying parameters using a custom device mode.

Other 4G Cat.1 module adaptation methods

1. Confirm whether the 4G module supports USB Fullspeed mode;

2. Confirm whether the 4G module supports USB PPP dial-up interface;

3. Confirm that the 4G SIM card is activated and the Internet access is turned on;

4. Confirm that the necessary signal wires have been connected in accordance with the hardware wiring;

5. Confirm the module's PPP interface input endpoint (IN) and output endpoint (OUT) addresses, and modify the following options in menuconfig:

   • Choose a User Defined board:

   Plaintext

   Component config → ESP-MODEM → Choose Modem Board → User Defined
                                
   

   • Configure the endpoint address of 4G Modem:

   Plaintext

   Component config → ESP-MODEM → USB CDC endpoint address config
                                        → Modem USB CDC IN endpoint address
                                        → Modem USB CDC OUT endpoint address
   

6. Check outputs log to confirm that the AT command can be executed;

The basic AT commands supported by different Cat.1 chip platforms are roughly the same, but there may be some special commands that need to be supported by users.

Examples

• USB CDC 4G Module