kopia lustrzana https://github.com/espressif/esp-idf
333 wiersze
11 KiB
C
333 wiersze
11 KiB
C
/*
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* Copyright 2010-2015 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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* Additions Copyright 2016 Espressif Systems (Shanghai) PTE LTD
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*
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* Licensed under the Apache License, Version 2.0 (the "License").
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* You may not use this file except in compliance with the License.
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* A copy of the License is located at
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*
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* http://aws.amazon.com/apache2.0
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*
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* or in the "license" file accompanying this file. This file is distributed
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* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
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* express or implied. See the License for the specific language governing
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* permissions and limitations under the License.
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*/
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/**
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* @file subscribe_publish_sample.c
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* @brief simple MQTT publish and subscribe on the same topic
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*
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* This example takes the parameters from the build configuration and establishes a connection to the AWS IoT MQTT Platform.
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* It subscribes and publishes to the same topic - "test_topic/esp32"
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*
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* Some setup is required. See example README for details.
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <unistd.h>
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#include <limits.h>
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#include <string.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "freertos/event_groups.h"
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#include "esp_system.h"
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#include "esp_wifi.h"
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#include "esp_event_loop.h"
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#include "esp_log.h"
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#include "esp_vfs_fat.h"
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#include "driver/sdmmc_host.h"
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#include "nvs.h"
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#include "nvs_flash.h"
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#include "aws_iot_config.h"
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#include "aws_iot_log.h"
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#include "aws_iot_version.h"
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#include "aws_iot_mqtt_client_interface.h"
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static const char *TAG = "subpub";
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/* The examples use simple WiFi configuration that you can set via
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'make menuconfig'.
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If you'd rather not, just change the below entries to strings with
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the config you want - ie #define EXAMPLE_WIFI_SSID "mywifissid"
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*/
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#define EXAMPLE_WIFI_SSID CONFIG_WIFI_SSID
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#define EXAMPLE_WIFI_PASS CONFIG_WIFI_PASSWORD
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/* FreeRTOS event group to signal when we are connected & ready to make a request */
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static EventGroupHandle_t wifi_event_group;
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/* The event group allows multiple bits for each event,
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but we only care about one event - are we connected
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to the AP with an IP? */
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const int CONNECTED_BIT = BIT0;
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/* CA Root certificate, device ("Thing") certificate and device
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* ("Thing") key.
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Example can be configured one of two ways:
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"Embedded Certs" are loaded from files in "certs/" and embedded into the app binary.
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"Filesystem Certs" are loaded from the filesystem (SD card, etc.)
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See example README for more details.
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*/
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#if defined(CONFIG_EXAMPLE_EMBEDDED_CERTS)
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extern const uint8_t aws_root_ca_pem_start[] asm("_binary_aws_root_ca_pem_start");
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extern const uint8_t aws_root_ca_pem_end[] asm("_binary_aws_root_ca_pem_end");
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extern const uint8_t certificate_pem_crt_start[] asm("_binary_certificate_pem_crt_start");
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extern const uint8_t certificate_pem_crt_end[] asm("_binary_certificate_pem_crt_end");
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extern const uint8_t private_pem_key_start[] asm("_binary_private_pem_key_start");
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extern const uint8_t private_pem_key_end[] asm("_binary_private_pem_key_end");
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#elif defined(CONFIG_EXAMPLE_FILESYSTEM_CERTS)
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static const char * DEVICE_CERTIFICATE_PATH = CONFIG_EXAMPLE_CERTIFICATE_PATH;
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static const char * DEVICE_PRIVATE_KEY_PATH = CONFIG_EXAMPLE_PRIVATE_KEY_PATH;
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static const char * ROOT_CA_PATH = CONFIG_EXAMPLE_ROOT_CA_PATH;
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#else
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#error "Invalid method for loading certs"
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#endif
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/**
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* @brief Default MQTT HOST URL is pulled from the aws_iot_config.h
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*/
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char HostAddress[255] = AWS_IOT_MQTT_HOST;
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/**
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* @brief Default MQTT port is pulled from the aws_iot_config.h
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*/
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uint32_t port = AWS_IOT_MQTT_PORT;
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static esp_err_t event_handler(void *ctx, system_event_t *event)
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{
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switch(event->event_id) {
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case SYSTEM_EVENT_STA_START:
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esp_wifi_connect();
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break;
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case SYSTEM_EVENT_STA_GOT_IP:
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xEventGroupSetBits(wifi_event_group, CONNECTED_BIT);
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break;
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case SYSTEM_EVENT_STA_DISCONNECTED:
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/* This is a workaround as ESP32 WiFi libs don't currently
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auto-reassociate. */
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esp_wifi_connect();
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xEventGroupClearBits(wifi_event_group, CONNECTED_BIT);
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break;
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default:
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break;
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}
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return ESP_OK;
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}
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void iot_subscribe_callback_handler(AWS_IoT_Client *pClient, char *topicName, uint16_t topicNameLen,
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IoT_Publish_Message_Params *params, void *pData) {
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ESP_LOGI(TAG, "Subscribe callback");
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ESP_LOGI(TAG, "%.*s\t%.*s", topicNameLen, topicName, (int) params->payloadLen, (char *)params->payload);
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}
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void disconnectCallbackHandler(AWS_IoT_Client *pClient, void *data) {
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ESP_LOGW(TAG, "MQTT Disconnect");
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IoT_Error_t rc = FAILURE;
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if(NULL == pClient) {
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return;
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}
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if(aws_iot_is_autoreconnect_enabled(pClient)) {
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ESP_LOGI(TAG, "Auto Reconnect is enabled, Reconnecting attempt will start now");
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} else {
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ESP_LOGW(TAG, "Auto Reconnect not enabled. Starting manual reconnect...");
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rc = aws_iot_mqtt_attempt_reconnect(pClient);
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if(NETWORK_RECONNECTED == rc) {
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ESP_LOGW(TAG, "Manual Reconnect Successful");
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} else {
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ESP_LOGW(TAG, "Manual Reconnect Failed - %d", rc);
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}
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}
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}
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void aws_iot_task(void *param) {
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char cPayload[100];
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int32_t i = 0;
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IoT_Error_t rc = FAILURE;
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AWS_IoT_Client client;
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IoT_Client_Init_Params mqttInitParams = iotClientInitParamsDefault;
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IoT_Client_Connect_Params connectParams = iotClientConnectParamsDefault;
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IoT_Publish_Message_Params paramsQOS0;
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IoT_Publish_Message_Params paramsQOS1;
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ESP_LOGI(TAG, "AWS IoT SDK Version %d.%d.%d-%s", VERSION_MAJOR, VERSION_MINOR, VERSION_PATCH, VERSION_TAG);
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mqttInitParams.enableAutoReconnect = false; // We enable this later below
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mqttInitParams.pHostURL = HostAddress;
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mqttInitParams.port = port;
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#if defined(CONFIG_EXAMPLE_EMBEDDED_CERTS)
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mqttInitParams.pRootCALocation = (const char *)aws_root_ca_pem_start;
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mqttInitParams.pDeviceCertLocation = (const char *)certificate_pem_crt_start;
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mqttInitParams.pDevicePrivateKeyLocation = (const char *)private_pem_key_start;
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#elif defined(CONFIG_EXAMPLE_FILESYSTEM_CERTS)
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mqttInitParams.pRootCALocation = ROOT_CA_PATH;
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mqttInitParams.pDeviceCertLocation = DEVICE_CERTIFICATE_PATH;
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mqttInitParams.pDevicePrivateKeyLocation = DEVICE_PRIVATE_KEY_PATH;
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#endif
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mqttInitParams.mqttCommandTimeout_ms = 20000;
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mqttInitParams.tlsHandshakeTimeout_ms = 5000;
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mqttInitParams.isSSLHostnameVerify = true;
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mqttInitParams.disconnectHandler = disconnectCallbackHandler;
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mqttInitParams.disconnectHandlerData = NULL;
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#ifdef CONFIG_EXAMPLE_SDCARD_CERTS
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ESP_LOGI(TAG, "Mounting SD card...");
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sdmmc_host_t host = SDMMC_HOST_DEFAULT();
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sdmmc_slot_config_t slot_config = SDMMC_SLOT_CONFIG_DEFAULT();
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esp_vfs_fat_sdmmc_mount_config_t mount_config = {
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.format_if_mount_failed = false,
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.max_files = 3,
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};
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sdmmc_card_t* card;
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esp_err_t ret = esp_vfs_fat_sdmmc_mount("/sdcard", &host, &slot_config, &mount_config, &card);
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if (ret != ESP_OK) {
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ESP_LOGE(TAG, "Failed to mount SD card VFAT filesystem. Error: %s", esp_err_to_name(ret));
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abort();
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}
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#endif
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rc = aws_iot_mqtt_init(&client, &mqttInitParams);
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if(SUCCESS != rc) {
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ESP_LOGE(TAG, "aws_iot_mqtt_init returned error : %d ", rc);
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abort();
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}
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/* Wait for WiFI to show as connected */
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xEventGroupWaitBits(wifi_event_group, CONNECTED_BIT,
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false, true, portMAX_DELAY);
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connectParams.keepAliveIntervalInSec = 10;
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connectParams.isCleanSession = true;
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connectParams.MQTTVersion = MQTT_3_1_1;
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/* Client ID is set in the menuconfig of the example */
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connectParams.pClientID = CONFIG_AWS_EXAMPLE_CLIENT_ID;
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connectParams.clientIDLen = (uint16_t) strlen(CONFIG_AWS_EXAMPLE_CLIENT_ID);
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connectParams.isWillMsgPresent = false;
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ESP_LOGI(TAG, "Connecting to AWS...");
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do {
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rc = aws_iot_mqtt_connect(&client, &connectParams);
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if(SUCCESS != rc) {
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ESP_LOGE(TAG, "Error(%d) connecting to %s:%d", rc, mqttInitParams.pHostURL, mqttInitParams.port);
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vTaskDelay(1000 / portTICK_RATE_MS);
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}
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} while(SUCCESS != rc);
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/*
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* Enable Auto Reconnect functionality. Minimum and Maximum time of Exponential backoff are set in aws_iot_config.h
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* #AWS_IOT_MQTT_MIN_RECONNECT_WAIT_INTERVAL
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* #AWS_IOT_MQTT_MAX_RECONNECT_WAIT_INTERVAL
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*/
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rc = aws_iot_mqtt_autoreconnect_set_status(&client, true);
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if(SUCCESS != rc) {
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ESP_LOGE(TAG, "Unable to set Auto Reconnect to true - %d", rc);
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abort();
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}
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const char *TOPIC = "test_topic/esp32";
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const int TOPIC_LEN = strlen(TOPIC);
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ESP_LOGI(TAG, "Subscribing...");
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rc = aws_iot_mqtt_subscribe(&client, TOPIC, TOPIC_LEN, QOS0, iot_subscribe_callback_handler, NULL);
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if(SUCCESS != rc) {
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ESP_LOGE(TAG, "Error subscribing : %d ", rc);
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abort();
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}
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sprintf(cPayload, "%s : %d ", "hello from SDK", i);
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paramsQOS0.qos = QOS0;
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paramsQOS0.payload = (void *) cPayload;
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paramsQOS0.isRetained = 0;
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paramsQOS1.qos = QOS1;
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paramsQOS1.payload = (void *) cPayload;
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paramsQOS1.isRetained = 0;
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while((NETWORK_ATTEMPTING_RECONNECT == rc || NETWORK_RECONNECTED == rc || SUCCESS == rc)) {
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//Max time the yield function will wait for read messages
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rc = aws_iot_mqtt_yield(&client, 100);
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if(NETWORK_ATTEMPTING_RECONNECT == rc) {
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// If the client is attempting to reconnect we will skip the rest of the loop.
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continue;
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}
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ESP_LOGI(TAG, "Stack remaining for task '%s' is %d bytes", pcTaskGetTaskName(NULL), uxTaskGetStackHighWaterMark(NULL));
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vTaskDelay(1000 / portTICK_RATE_MS);
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sprintf(cPayload, "%s : %d ", "hello from ESP32 (QOS0)", i++);
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paramsQOS0.payloadLen = strlen(cPayload);
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rc = aws_iot_mqtt_publish(&client, TOPIC, TOPIC_LEN, ¶msQOS0);
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sprintf(cPayload, "%s : %d ", "hello from ESP32 (QOS1)", i++);
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paramsQOS1.payloadLen = strlen(cPayload);
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rc = aws_iot_mqtt_publish(&client, TOPIC, TOPIC_LEN, ¶msQOS1);
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if (rc == MQTT_REQUEST_TIMEOUT_ERROR) {
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ESP_LOGW(TAG, "QOS1 publish ack not received.");
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rc = SUCCESS;
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}
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}
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ESP_LOGE(TAG, "An error occurred in the main loop.");
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abort();
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}
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static void initialise_wifi(void)
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{
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tcpip_adapter_init();
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wifi_event_group = xEventGroupCreate();
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ESP_ERROR_CHECK( esp_event_loop_init(event_handler, NULL) );
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wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
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ESP_ERROR_CHECK( esp_wifi_init(&cfg) );
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ESP_ERROR_CHECK( esp_wifi_set_storage(WIFI_STORAGE_RAM) );
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wifi_config_t wifi_config = {
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.sta = {
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.ssid = EXAMPLE_WIFI_SSID,
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.password = EXAMPLE_WIFI_PASS,
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},
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};
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ESP_LOGI(TAG, "Setting WiFi configuration SSID %s...", wifi_config.sta.ssid);
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ESP_ERROR_CHECK( esp_wifi_set_mode(WIFI_MODE_STA) );
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ESP_ERROR_CHECK( esp_wifi_set_config(WIFI_IF_STA, &wifi_config) );
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ESP_ERROR_CHECK( esp_wifi_start() );
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}
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void app_main()
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{
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// Initialize NVS.
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esp_err_t err = nvs_flash_init();
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if (err == ESP_ERR_NVS_NO_FREE_PAGES || err == ESP_ERR_NVS_NEW_VERSION_FOUND) {
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ESP_ERROR_CHECK(nvs_flash_erase());
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err = nvs_flash_init();
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}
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ESP_ERROR_CHECK( err );
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initialise_wifi();
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xTaskCreatePinnedToCore(&aws_iot_task, "aws_iot_task", 9216, NULL, 5, NULL, 1);
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}
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