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README.md

Multiple Ethernet Example

(See the README.md file in the upper level 'examples' directory for more information about examples.)

Overview

This example demonstrates basic usage of Ethernet interface and WiFi station together. The workflow of the example could be as follow:

Connects to both WiFi and Ethernet using common-connect component
Starts two tasks, one for each interface to resolve configured host name and connect to it periodically
Connection to host endpoint is handled by:
- creating a socket as TCP client
- binding it to the related interface (Ethernet of WiFi)
- send and receive a trivial HTTP request and response

If you have a new multiple interface application to go (for example, connect to IoT cloud via Ethernet and WiFi), try this as a basic template, then add your own code.

How to use example

Hardware Required

To run this example, you need to have one ESP32 development board integrated with an Ethernet interface, for example, ESP32-Ethernet-Kit, or just connect your ESP32-DevkitC board to a breakout board which features RMII Ethernet PHY.

Configure the project

Enter project configuration by idf.py menuconfig (or make menuconfig if using legacy GNU Make build system) and navigate into:

Example Connection Configuration menu to choose the connection details:
- Enter SSID and password for WiFi connection
- Set Ethernet type and configuration for Ethernet connection
- Note that the project is preconfigured to have both WiFi and Ethernet interface enabled by default
- See the README.md for more details about common example connection component
Example Configuration menu:
- Set host name and port for the tcp_client to connect to

Build and Flash

Run idf.py -p PORT flash monitor to build and flash the project..

(To exit the serial monitor, type Ctrl-].)

See the Getting Started Guide for full steps to configure and use ESP-IDF to build projects.

Example Output

I (695) example_connect: Connecting to DavidsAP...
I (795) phy: phy_version: 4180, cb3948e, Sep 12 2019, 16:39:13, 0, 0
I (795) wifi:mode : sta (30:ae:a4:c6:b4:f8)
W (795) event: handler already registered, overwriting
I (815) esp_eth.netif.glue: 30:ae:a4:c6:b4:fb
I (815) esp_eth.netif.glue: ethernet attached to netif
I (825) example_connect: Waiting for IP(s)
I (1525) wifi:new:<6,0>, old:<1,0>, ap:<255,255>, sta:<6,0>, prof:1
I (2295) wifi:state: init -> auth (b0)
I (2295) wifi:state: auth -> assoc (0)
I (2305) wifi:state: assoc -> run (10)
I (2315) wifi:connected with DavidsAP, aid = 2, channel 6, BW20, bssid = 16:f7:28:37:58:36
I (2315) wifi:security type: 3, phy: bgn, rssi: -35
I (2315) wifi:pm start, type: 1

I (2325) wifi:AP's beacon interval = 102400 us, DTIM period = 3
I (3125) esp_netif_handlers: example_connect: sta ip: 192.168.2.15, mask: 255.255.255.0, gw: 192.168.2.1
I (3125) example_connect: Interface desciption example_connect: sta
I (3135) example_connect: Interface "example_connect: sta" got IPv4 address: 192.168.2.15
I (3625) example_connect: Interface "example_connect: sta" got IPv6 address: fe80:0000:0000:0000:32ae:a4ff:fec6:b4f8, type: ESP_IP6_ADDR_IS_LINK_LOCAL
I (4825) example_connect: Ethernet Link Up
I (5625) esp_netif_handlers: example_connect: eth ip: 192.168.32.148, mask: 255.255.252.0, gw: 192.168.32.3
I (5625) example_connect: Interface desciption example_connect: eth
I (5635) example_connect: Interface "example_connect: eth" got IPv4 address: 192.168.32.148
I (6625) example_connect: Interface "example_connect: eth" got IPv6 address: fe80:0000:0000:0000:32ae:a4ff:fec6:b4fb, type: ESP_IP6_ADDR_IS_LINK_LOCAL
I (6625) example_connect: Connected to example_connect: eth
I (6635) example_connect: - IPv4 address: 192.168.32.148
I (6635) example_connect: - IPv6 address: fe80:0000:0000:0000:32ae:a4ff:fec6:b4fbtype: ESP_IP6_ADDR_IS_LINK_LOCAL
I (6645) example_connect: Connected to example_connect: sta
I (6655) example_connect: - IPv4 address: 192.168.2.15
I (6655) example_connect: - IPv6 address: fe80:0000:0000:0000:32ae:a4ff:fec6:b4f8type: ESP_IP6_ADDR_IS_LINK_LOCAL
I (6675) example_connect: Connected to Ethernet
I (6675) tcp_client_multiple: netif described as "sta" corresponds to esp-netif ptr:0x3ffba3ac
I (6675) tcp_client_multiple: netif described as "eth" corresponds to esp-netif ptr:0x3ffc608c
I (6895) tcp_client_multiple: "example_connect: eth" Socket created
I (6895) tcp_client_multiple: "example_connect: sta" Socket created
I (6895) tcp_client_multiple: "example_connect: eth" Successfully connected
I (6905) tcp_client_multiple: "example_connect: sta" Successfully connected
I (6965) tcp_client_multiple: "example_connect: eth" Received Data 127 bytes
I (6965) tcp_client_multiple: HTTP/1.1 200 OK
Date: Thu, 23 Apr 2020 07:02:58 GMT
Expires: -1
Cache-Control: private, max-age=0
Content-Type: text/html;
I (6965) tcp_client_multiple: "example_connect: sta" Received Data 127 bytes
I (6985) tcp_client_multiple: HTTP/1.1 200 OK
Date: Thu, 23 Apr 2020 07:02:58 GMT
Expires: -1
Cache-Control: private, max-age=0
Content-Type: text/html;
I (7675) tcp_client_multiple: "example_connect: eth" Socket created
I (7675) tcp_client_multiple: "example_connect: eth" Successfully connected
I (7695) tcp_client_multiple: "example_connect: sta" Socket created
I (7705) tcp_client_multiple: "example_connect: sta" Successfully connected
I (7735) tcp_client_multiple: "example_connect: eth" Received Data 127 bytes
I (7735) tcp_client_multiple: HTTP/1.1 200 OK
Date: Thu, 23 Apr 2020 07:02:59 GMT
Expires: -1
Cache-Control: private, max-age=0
Content-Type: text/html;
I (7955) tcp_client_multiple: "example_connect: sta" Received Data 127 bytes
I (7955) tcp_client_multiple: HTTP/1.1 200 OK
Date: Thu, 23 Apr 2020 07:02:59 GMT
Expires: -1
Cache-Control: private, max-age=0
Content-Type: text/html;
I (8445) tcp_client_multiple: "example_connect: eth" Socket created
I (8445) tcp_client_multiple: "example_connect: eth" Successfully connected
I (8505) tcp_client_multiple: "example_connect: eth" Received Data 127 bytes
I (8505) tcp_client_multiple: HTTP/1.1 200 OK
Date: Thu, 23 Apr 2020 07:03:00 GMT
Expires: -1
Cache-Control: private, max-age=0
Content-Type: text/html;
I (8675) tcp_client_multiple: "example_connect: sta" Socket created

Troubleshooting

When connecting using Ethernet, please consult troubleshooting described in Ethernet common readme or Ethernet documentation. If using Ethernet for the first time, it is recommended to start with the Ethernet example readme, which contains instructions for connecting and configuring the PHY. Once Ethernet example obtains IP address successfully, proceed to this example.
When connecting using Wi-Fi, please refer to the WiFi examples in examples/wifi/getting_started/.