esp-idf/examples/protocols/asio/ssl_client_server/README.md

Supported Targets	ESP32	ESP32-S2	ESP32-S3	ESP32-C3

Asio SSL client/server example

Simple Asio client and server with SSL/TLS transport

How to Use Example

Hardware Required

This example can be executed on any ESP platform board. No external connection is required, it is recommended though to connect to internet or a local network via WiFi or Ethernet to easily exercise features of this example.

Configure the project

• Open the project configuration menu (idf.py menuconfig)
• Configure Wi-Fi or Ethernet under "Example Connection Configuration" menu. See "Establishing Wi-Fi or Ethernet Connection" section in examples/protocols/README.md for more details.
• Enable the ASIO client and set server's host name to examine client's functionality. The ASIO client connects to the configured server and sends default payload string "GET / HTTP/1.1"
• Enable the ASIO server to examine server's functionality. The ASIO server listens to connection and echos back what was received.

Build and Flash

Build the project and flash it to the board, then run monitor tool to view serial output:

idf.py -p PORT flash monitor

(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

Client connecting to public server

The below output illustrates the client connecting to a public https server.

I (1267) example_connect: Waiting for IP(s)
I (2587) wifi:new:<11,0>, old:<1,0>, ap:<255,255>, sta:<11,0>, prof:1
I (3367) wifi:state: init -> auth (b0)
I (3377) wifi:state: auth -> assoc (0)
I (3387) wifi:state: assoc -> run (10)
I (3397) wifi:security type: 3, phy: bgn, rssi: -49
I (3397) wifi:pm start, type: 1
I (3457) wifi:AP's beacon interval = 102400 us, DTIM period = 1
I (4747) example_connect: Got IPv6 event: Interface "example_connect: sta" address: fe80:0000:0000:0000:260a:xxxx:xxxx:xxxx, type: ESP_IP6_ADDR_IS_LINK_LOCAL
I (5247) esp_netif_handlers: example_connect: sta ip: 192.168.32.69, mask: 255.255.252.0, gw: 192.168.32.3
I (5247) example_connect: Got IPv4 event: Interface "example_connect: sta" address: 192.168.32.69
I (5257) example_connect: Connected to example_connect: sta
I (5257) example_connect: - IPv4 address: 192.168.32.69
I (5267) example_connect: - IPv6 address: fe80:0000:0000:0000:260a:xxxx:xxxx:xxxx, type: ESP_IP6_ADDR_IS_LINK_LOCAL
W (5277) esp32_asio_pthread: pthread_condattr_setclock: not yet supported!
W (5297) esp32_asio_pthread: pthread_condattr_setclock: not yet supported!
Reply: HTTP/1.1 200 OK
D

Both server and client enabled

The below output demonstrates the client connecting to the ASIO server via loopback interface, so no WiFi, nor Ethernet connection was established.

I (0) cpu_start: App cpu up.
I (495) heap_init: Initializing. RAM available for dynamic allocation:
I (502) heap_init: At 3FFAE6E0 len 00001920 (6 KiB): DRAM
I (508) heap_init: At 3FFB5400 len 0002AC00 (171 KiB): DRAM
I (515) heap_init: At 3FFE0440 len 00003AE0 (14 KiB): D/IRAM
I (521) heap_init: At 3FFE4350 len 0001BCB0 (111 KiB): D/IRAM
I (527) heap_init: At 4008BB80 len 00014480 (81 KiB): IRAM
I (534) cpu_start: Pro cpu start user code
I (556) spi_flash: detected chip: gd
I (556) spi_flash: flash io: dio
W (556) spi_flash: Detected size(4096k) larger than the size in the binary image header(2048k). Using the size in the binary image header.
I (566) cpu_start: Starting scheduler on PRO CPU.
I (0) cpu_start: Starting scheduler on APP CPU.
I (600) example_connect: Waiting for IP(s)
W (600) esp32_asio_pthread: pthread_condattr_setclock: not yet supported!
W (1610) esp32_asio_pthread: pthread_condattr_setclock: not yet supported!
W (1610) esp32_asio_pthread: pthread_condattr_setclock: not yet supported!
Server received: GET / HTTP/1.1


Reply: GET / HTTP/1.1

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