| Supported Targets | ESP32 | ESP32-C2 | ESP32-C3 | ESP32-C6 | ESP32-S2 | ESP32-S3 | ESP32-H2 | | ----------------- | ----- | -------- | -------- | -------- | -------- | -------- | -------- | # 4G NIC example ## Overview This example focuses on the networking part, enabling packet forwarding between network interfaces. It can be connected to PC or MCU through multiple network interfaces (ETH/SPI/SDIO), and ESP32 series chips use NAT to forward data packets in and out of the PPP network interface. <img src="https://raw.githubusercontent.com/espressif/esp-iot-bridge/master/components/iot_bridge/docs/_static/4g_nic_en.png" style="zoom:80%;" /> ### How to use example #### Hardware Required **Required** - A 4G module - An esp32 series development board - A Micro-USB cable for power supply and programming **Optional** - One Ethernet cable - A USB cable for communication - Some DuPont cables to connect to the SPI or SDIO interface of the MCU Follow detailed instructions provided specifically for this example. #### Choose the interface of the modem You can select the interface (UART or USB) connected to the Modem in `Component config → Bridge Configuration → Modem Configuration` of `menuconfig`. #### Choose the interface used to provide network data forwarding for other devices You can select the interface (ETH/SPI/SDIO) connected to the PC/MCU in `Component config → Bridge Configuration → The interface used to provide network data forwarding for other devices` of `menuconfig`. #### Build and Flash Run `idf.py flash monitor` to build, flash and monitor the project. Once a complete flash process has been performed, you can use `idf.py app-flash monitor` to reduce the flash time. (To exit the serial monitor, type `Ctrl-]`. Please reset the development board f you cannot exit the monitor.) For more information, see [User_Guide.md](https://github.com/espressif/esp-iot-bridge/blob/master/components/iot_bridge/User_Guide.md).
To create a project from this example, run:
idf.py create-project-from-example "espressif/iot_bridge=0.7.1:4g_nic"