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wifi: esp32: add board wifi station sample
add esp32 wifi station board example Signed-off-by: Sylvio Alves <sylvio.alves@espressif.com>
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‎samples/boards/esp32/wifi_station/CMakeLists.txt‎

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# SPDX-License-Identifier: Apache-2.0
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cmake_minimum_required(VERSION 3.13.1)
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find_package(Zephyr HINTS $ENV{ZEPHYR_BASE})
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project(esp32_wifi_station)
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FILE(GLOB app_sources src/*.c)
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target_sources(app PRIVATE ${app_sources})

‎samples/boards/esp32/wifi_station/README.rst‎

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.. _esp32_wifi_station:
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Espressif ESP32 WiFi Station
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############################
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Overview
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********
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This sample demonstrates how to use ESP32 to connect to a WiFi network as a station device.
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To configure WiFi credentials, edit ``prj.conf``.
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Enabling the ``net_shell`` module provides a set of commands to test the connection.
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See :ref:`network shell <net_shell>` for more details.
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Building and Running
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********************
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Make sure you have the ESP32 connected over USB port.
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The sample can be built and flashed as follows:
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.. code-block:: console
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west build -b esp32 samples/boards/esp32/wifi_station
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west flash --esp-device /dev/ttyUSB0
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Sample Output
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=============
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To check output of this sample, any serial console program can be used (i.e. on Linux minicom, putty, screen, etc)
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This example uses ``picocom`` on the serial port ``/dev/ttyUSB0``:
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.. code-block:: console
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$ picocom /dev/ttyUSB0 - 115200
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.. code-block:: console
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I (288) boot: Loaded app from partition at offset 0x10000
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I (288) boot: Disabling RNG early entropy source...
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I (611) wifi:wifi driver task: 3ffb2be8, prio:2, stack:3584, core=0
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I (613) wifi:wifi firmware version: 9c89486
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I (613) wifi:wifi certification version: v7.0
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I (614) wifi:config NVS flash: disabled
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I (618) wifi:config nano formating: disabled
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I (622) wifi:Init data frame dynamic rx buffer num: 32
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I (627) wifi:Init management frame dynamic rx buffer num: 32
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I (632) wifi:Init management short buffer num: 32
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I (636) wifi:Init dynamic tx buffer num: 32
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I (640) wifi:Init static rx buffer size: 1600
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I (645) wifi:Init static rx buffer num: 10
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I (648) wifi:Init dynamic rx buffer num: 32
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phy_version: 4350, 18c5e94, Jul 27 2020, 21:04:07, 0, 2
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I (783) wifi:mode : softAP (24:6f:28:80:32:e9)
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I (784) wifi:Total power save buffer number: 16
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I (784) wifi:Init max length of beacon: 752/752
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I (788) wifi:Init max length of beacon: 752/752
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*** Booting Zephyr OS build zephyr-v2.4.0-49-g4da59e1678f7 ***
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I (798) wifi:mode : sta (24:6f:28:80:32:e8)
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I (1046) wifi:new:<4,1>, old:<1,1>, ap:<255,255>, sta:<4,1>, prof:1
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I (1694) wifi:state: init -> auth (b0)
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I (1711) wifi:state: auth -> assoc (0)
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I (1717) wifi:state: assoc -> run (10)
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I (1745) wifi:connected with myssid, aid = 4, channel 4, 40U, bssid = d8:07:b6:dd:47:7a
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I (1745) wifi:security: WPA2-PSK, phy: bgn, rssi: -57
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I (1747) wifi:pm start, type: 1
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esp_event: WIFI STA start
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esp_event: WIFI STA connected
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I (1813) wifi:AP's beacon interval = 102400 us, DTIM period = 1
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net_dhcpv4: Received: 192.168.68.102
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esp32_wifi_sta: Your address: 192.168.68.102
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esp32_wifi_sta: Lease time: 7200 seconds
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esp32_wifi_sta: Subnet: 255.255.255.0
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esp32_wifi_sta: Router: 192.168.68.1
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Sample console interaction
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==========================
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If the :option:`CONFIG_NET_SHELL` option is set, network shell functions
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can be used to check internet connection.
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.. code-block:: console
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shell> net ping 8.8.8.8
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PING 8.8.8.8
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28 bytes from 8.8.8.8 to 192.168.68.102: icmp_seq=0 ttl=118 time=19 ms
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28 bytes from 8.8.8.8 to 192.168.68.102: icmp_seq=1 ttl=118 time=16 ms
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28 bytes from 8.8.8.8 to 192.168.68.102: icmp_seq=2 ttl=118 time=21 ms

‎samples/boards/esp32/wifi_station/prj.conf‎

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CONFIG_WIFI=y
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CONFIG_WIFI_ESP32=y
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CONFIG_HEAP_MEM_POOL_SIZE=98304
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CONFIG_NETWORKING=y
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CONFIG_NET_L2_ETHERNET=y
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CONFIG_NET_IPV6=n
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CONFIG_NET_IPV4=y
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CONFIG_NET_DHCPV4=y
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CONFIG_NET_MGMT=y
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CONFIG_NET_MGMT_EVENT=y
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CONFIG_NET_LOG=y
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CONFIG_NET_SHELL=n
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CONFIG_MBEDTLS=y
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CONFIG_MBEDTLS_ENTROPY_ENABLED=y
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CONFIG_MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED=y
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CONFIG_MBEDTLS_ECP_ALL_ENABLED=y
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CONFIG_ESP32_WIFI_SSID="myssid"
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CONFIG_ESP32_WIFI_PASSWORD="mypassword"

‎samples/boards/esp32/wifi_station/sample.yaml‎

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sample:
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name: Espressif ESP32 WiFi Station
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tests:
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sample.board.esp32:
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platform_allow: esp32
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tags: esp32

‎samples/boards/esp32/wifi_station/src/main.c‎

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/*
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* Copyright (c) 2020 Espressif Systems (Shanghai) Co., Ltd.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr.h>
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#include <sys/printk.h>
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#include <esp_wifi.h>
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#include <esp_timer.h>
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#include <esp_event.h>
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#include <net/net_if.h>
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#include <net/net_core.h>
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#include <net/net_context.h>
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#include <net/net_mgmt.h>
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#include <logging/log.h>
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LOG_MODULE_REGISTER(esp32_wifi_sta, LOG_LEVEL_DBG);
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static struct net_mgmt_event_callback dhcp_cb;
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static void handler_cb(struct net_mgmt_event_callback *cb,
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uint32_t mgmt_event, struct net_if *iface)
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{
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if (mgmt_event != NET_EVENT_IPV4_DHCP_BOUND) {
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return;
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}
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char buf[NET_IPV4_ADDR_LEN];
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LOG_INF("Your address: %s",
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log_strdup(net_addr_ntop(AF_INET,
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&iface->config.dhcpv4.requested_ip,
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buf, sizeof(buf))));
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LOG_INF("Lease time: %u seconds",
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iface->config.dhcpv4.lease_time);
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LOG_INF("Subnet: %s",
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log_strdup(net_addr_ntop(AF_INET,
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&iface->config.ip.ipv4->netmask,
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buf, sizeof(buf))));
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LOG_INF("Router: %s",
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log_strdup(net_addr_ntop(AF_INET,
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&iface->config.ip.ipv4->gw,
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buf, sizeof(buf))));
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}
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void main(void)
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{
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struct net_if *iface;
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net_mgmt_init_event_callback(&dhcp_cb, handler_cb,
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NET_EVENT_IPV4_DHCP_BOUND);
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net_mgmt_add_event_callback(&dhcp_cb);
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iface = net_if_get_default();
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if (!iface) {
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LOG_ERR("wifi interface not available");
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return;
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}
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net_dhcpv4_start(iface);
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if (!IS_ENABLED(CONFIG_ESP32_WIFI_STA_AUTO)) {
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wifi_config_t wifi_config = {
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.sta = {
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.ssid = CONFIG_ESP32_WIFI_SSID,
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.password = CONFIG_ESP32_WIFI_PASSWORD,
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},
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};
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esp_err_t ret = esp_wifi_set_mode(WIFI_MODE_STA);
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ret |= esp_wifi_set_config(ESP_IF_WIFI_STA, &wifi_config);
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ret |= esp_wifi_connect();
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if (ret != ESP_OK) {
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LOG_ERR("connection failed");
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}
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}
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}

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