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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:

Name PPP Secondary AT Port
ML302-DNLM/CNLM Support No-Support
Air724UG-NFM Support unknown
EC600N-CNLA-N05 Support unknown
EC600N-CNLC-N06 Support unknown
SIMCom A7600C1 Support unknown
BG95_M3 Support unknown
BG96_MA Support unknown
MC610_EU Support Support

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

Links

License: Apache-2.0

To add this component to your project, run:

idf.py add-dependency "espressif/iot_usbh_modem^1.1.5"

or download archive

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espressif/iot_usbh_modem version: 1.1.5
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