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81 lines
4.2 KiB
Markdown
81 lines
4.2 KiB
Markdown
| Supported Targets | ESP32 | ESP32-C2 | ESP32-C3 | ESP32-C5 | ESP32-C6 | ESP32-H2 | ESP32-P4 | ESP32-S2 | ESP32-S3 |
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| ----------------- | ----- | -------- | -------- | -------- | -------- | -------- | -------- | -------- | -------- |
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# Ethernet Example
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(See the README.md file in the upper level 'examples' directory for more information about examples.)
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## Overview
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This example demonstrates basic usage of `Ethernet driver` together with `esp_netif`. Initialization of the `Ethernet driver` is wrapped in separate [sub-component](./components/ethernet_init/ethernet_init.c) of this project to clearly distinguish between the driver's and `esp_netif` initializations. The work flow of the example could be as follows:
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1. Install Ethernet driver
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2. Attach the driver to `esp_netif`
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3. Send DHCP requests and wait for a DHCP lease
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4. If get IP address successfully, then you will be able to ping the device
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If you have a new Ethernet application to go (for example, connect to IoT cloud via Ethernet), try this as a basic template, then add your own code.
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## How to use example
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### Hardware Required
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To run this example, it's recommended that you have an official ESP32 Ethernet development board - [ESP32-Ethernet-Kit](https://docs.espressif.com/projects/esp-idf/en/latest/hw-reference/get-started-ethernet-kit.html). This example should also work for 3rd party ESP32 board as long as it's integrated with a supported Ethernet PHY chip. Up until now, ESP-IDF supports up to four Ethernet PHY: `LAN8720`, `IP101`, `DP83848` and `RTL8201`, additional PHY drivers should be implemented by users themselves.
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Besides that, `esp_eth` component can drive third-party Ethernet module which integrates MAC and PHY and provides common communication interface (e.g. SPI, USB, etc). This example will take the `DM9051`, `W5500` or `KSZ8851SNL` SPI modules as an example, illustrating how to install the Ethernet driver in the same manner.
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The ESP-IDF supports the usage of multiple Ethernet interfaces at a time when external modules are utilized which is also demonstrated by this example. There are several options you can combine:
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* Internal EMAC and one SPI Ethernet module.
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* Two SPI Ethernet modules of the same type connected to single SPI interface and accessed by switching appropriate CS.
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* Internal EMAC and two SPI Ethernet modules of the same type.
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#### Pin Assignment
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See common pin assignments for Ethernet examples from [upper level](../README.md#common-pin-assignments).
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When using two Ethernet SPI modules at a time, they are to be connected to single SPI interface. Both modules then share data (MOSI/MISO) and CLK signals. However, the CS, interrupt and reset pins need to be connected to separate GPIO for each Ethernet SPI module.
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### Configure the project
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```
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idf.py menuconfig
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```
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See common configurations for Ethernet examples from [upper level](../README.md#common-configurations).
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### Build, Flash, and Run
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Build the project and flash it to the board, then run monitor tool to view serial output:
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```
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idf.py -p PORT build flash monitor
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```
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(Replace PORT with the name of the serial port to use.)
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(To exit the serial monitor, type ``Ctrl-]``.)
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See the [Getting Started Guide](https://docs.espressif.com/projects/esp-idf/en/latest/get-started/index.html) for full steps to configure and use ESP-IDF to build projects.
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## Example Output
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```bash
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I (394) eth_example: Ethernet Started
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I (3934) eth_example: Ethernet Link Up
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I (3934) eth_example: Ethernet HW Addr 30:ae:a4:c6:87:5b
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I (5864) esp_netif_handlers: eth ip: 192.168.2.151, mask: 255.255.255.0, gw: 192.168.2.2
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I (5864) eth_example: Ethernet Got IP Address
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I (5864) eth_example: ~~~~~~~~~~~
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I (5864) eth_example: ETHIP:192.168.2.151
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I (5874) eth_example: ETHMASK:255.255.255.0
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I (5874) eth_example: ETHGW:192.168.2.2
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I (5884) eth_example: ~~~~~~~~~~~
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```
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Now you can ping your ESP32 in the terminal by entering `ping 192.168.2.151` (it depends on the actual IP address you get).
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## Troubleshooting
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See common troubleshooting for Ethernet examples from [upper level](../README.md#common-troubleshooting).
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(For any technical queries, please open an [issue](https://github.com/espressif/esp-idf/issues) on GitHub. We will get back to you as soon as possible.)
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