368 lines
13 KiB
C
368 lines
13 KiB
C
/*
|
|
* Copyright 2010-2015 Amazon.com, Inc. or its affiliates. All Rights Reserved.
|
|
* Additions Copyright 2016 Espressif Systems (Shanghai) PTE LTD
|
|
*
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License").
|
|
* You may not use this file except in compliance with the License.
|
|
* A copy of the License is located at
|
|
*
|
|
* http://aws.amazon.com/apache2.0
|
|
*
|
|
* or in the "license" file accompanying this file. This file is distributed
|
|
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
|
|
* express or implied. See the License for the specific language governing
|
|
* permissions and limitations under the License.
|
|
*/
|
|
/**
|
|
* @file thing_shadow_sample.c
|
|
* @brief A simple connected window example demonstrating the use of Thing Shadow
|
|
*
|
|
* See example README for more details.
|
|
*/
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <ctype.h>
|
|
#include <unistd.h>
|
|
#include <limits.h>
|
|
#include <string.h>
|
|
|
|
#include "freertos/FreeRTOS.h"
|
|
#include "freertos/task.h"
|
|
#include "freertos/event_groups.h"
|
|
#include "esp_system.h"
|
|
#include "esp_wifi.h"
|
|
#include "esp_event_loop.h"
|
|
#include "esp_log.h"
|
|
#include "esp_vfs_fat.h"
|
|
#include "driver/sdmmc_host.h"
|
|
|
|
#include "aws_iot_config.h"
|
|
#include "aws_iot_log.h"
|
|
#include "aws_iot_version.h"
|
|
#include "aws_iot_mqtt_client_interface.h"
|
|
#include "aws_iot_shadow_interface.h"
|
|
|
|
/*!
|
|
* The goal of this sample application is to demonstrate the capabilities of shadow.
|
|
* This device(say Connected Window) will open the window of a room based on temperature
|
|
* It can report to the Shadow the following parameters:
|
|
* 1. temperature of the room (double)
|
|
* 2. status of the window (open or close)
|
|
* It can act on commands from the cloud. In this case it will open or close the window based on the json object "windowOpen" data[open/close]
|
|
*
|
|
* The two variables from a device's perspective are double temperature and bool windowOpen
|
|
* The device needs to act on only on windowOpen variable, so we will create a primitiveJson_t object with callback
|
|
The Json Document in the cloud will be
|
|
{
|
|
"reported": {
|
|
"temperature": 0,
|
|
"windowOpen": false
|
|
},
|
|
"desired": {
|
|
"windowOpen": false
|
|
}
|
|
}
|
|
*/
|
|
|
|
static const char *TAG = "shadow";
|
|
|
|
#define ROOMTEMPERATURE_UPPERLIMIT 32.0f
|
|
#define ROOMTEMPERATURE_LOWERLIMIT 25.0f
|
|
#define STARTING_ROOMTEMPERATURE ROOMTEMPERATURE_LOWERLIMIT
|
|
|
|
#define MAX_LENGTH_OF_UPDATE_JSON_BUFFER 200
|
|
|
|
/* The examples use simple WiFi configuration that you can set via
|
|
'make menuconfig'.
|
|
|
|
If you'd rather not, just change the below entries to strings with
|
|
the config you want - ie #define EXAMPLE_WIFI_SSID "mywifissid"
|
|
*/
|
|
#define EXAMPLE_WIFI_SSID CONFIG_WIFI_SSID
|
|
#define EXAMPLE_WIFI_PASS CONFIG_WIFI_PASSWORD
|
|
|
|
|
|
/* FreeRTOS event group to signal when we are connected & ready to make a request */
|
|
static EventGroupHandle_t wifi_event_group;
|
|
|
|
/* The event group allows multiple bits for each event,
|
|
but we only care about one event - are we connected
|
|
to the AP with an IP? */
|
|
const int CONNECTED_BIT = BIT0;
|
|
|
|
|
|
/* CA Root certificate, device ("Thing") certificate and device
|
|
* ("Thing") key.
|
|
|
|
Example can be configured one of two ways:
|
|
|
|
"Embedded Certs" are loaded from files in "certs/" and embedded into the app binary.
|
|
|
|
"Filesystem Certs" are loaded from the filesystem (SD card, etc.)
|
|
|
|
See example README for more details.
|
|
*/
|
|
#if defined(CONFIG_EXAMPLE_EMBEDDED_CERTS)
|
|
|
|
extern const uint8_t aws_root_ca_pem_start[] asm("_binary_aws_root_ca_pem_start");
|
|
extern const uint8_t aws_root_ca_pem_end[] asm("_binary_aws_root_ca_pem_end");
|
|
extern const uint8_t certificate_pem_crt_start[] asm("_binary_certificate_pem_crt_start");
|
|
extern const uint8_t certificate_pem_crt_end[] asm("_binary_certificate_pem_crt_end");
|
|
extern const uint8_t private_pem_key_start[] asm("_binary_private_pem_key_start");
|
|
extern const uint8_t private_pem_key_end[] asm("_binary_private_pem_key_end");
|
|
|
|
#elif defined(CONFIG_EXAMPLE_FILESYSTEM_CERTS)
|
|
|
|
static const char * DEVICE_CERTIFICATE_PATH = CONFIG_EXAMPLE_CERTIFICATE_PATH;
|
|
static const char * DEVICE_PRIVATE_KEY_PATH = CONFIG_EXAMPLE_PRIVATE_KEY_PATH;
|
|
static const char * ROOT_CA_PATH = CONFIG_EXAMPLE_ROOT_CA_PATH;
|
|
|
|
#else
|
|
#error "Invalid method for loading certs"
|
|
#endif
|
|
|
|
/**
|
|
* @brief Default MQTT HOST URL is pulled from the aws_iot_config.h which
|
|
* uses menuconfig to find a default.
|
|
*/
|
|
char HostAddress[255] = AWS_IOT_MQTT_HOST;
|
|
|
|
/**
|
|
* @brief Default MQTT port is pulled from the aws_iot_config.h which
|
|
* uses menuconfig to find a default.
|
|
*/
|
|
uint32_t port = AWS_IOT_MQTT_PORT;
|
|
|
|
static esp_err_t event_handler(void *ctx, system_event_t *event)
|
|
{
|
|
switch(event->event_id) {
|
|
case SYSTEM_EVENT_STA_START:
|
|
esp_wifi_connect();
|
|
break;
|
|
case SYSTEM_EVENT_STA_GOT_IP:
|
|
xEventGroupSetBits(wifi_event_group, CONNECTED_BIT);
|
|
break;
|
|
case SYSTEM_EVENT_STA_DISCONNECTED:
|
|
/* This is a workaround as ESP32 WiFi libs don't currently
|
|
auto-reassociate. */
|
|
esp_wifi_connect();
|
|
xEventGroupClearBits(wifi_event_group, CONNECTED_BIT);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return ESP_OK;
|
|
}
|
|
|
|
static void simulateRoomTemperature(float *pRoomTemperature) {
|
|
static float deltaChange;
|
|
|
|
if(*pRoomTemperature >= ROOMTEMPERATURE_UPPERLIMIT) {
|
|
deltaChange = -0.5f;
|
|
} else if(*pRoomTemperature <= ROOMTEMPERATURE_LOWERLIMIT) {
|
|
deltaChange = 0.5f;
|
|
}
|
|
|
|
*pRoomTemperature += deltaChange;
|
|
}
|
|
|
|
static bool shadowUpdateInProgress;
|
|
|
|
void ShadowUpdateStatusCallback(const char *pThingName, ShadowActions_t action, Shadow_Ack_Status_t status,
|
|
const char *pReceivedJsonDocument, void *pContextData) {
|
|
IOT_UNUSED(pThingName);
|
|
IOT_UNUSED(action);
|
|
IOT_UNUSED(pReceivedJsonDocument);
|
|
IOT_UNUSED(pContextData);
|
|
|
|
shadowUpdateInProgress = false;
|
|
|
|
if(SHADOW_ACK_TIMEOUT == status) {
|
|
ESP_LOGE(TAG, "Update timed out");
|
|
} else if(SHADOW_ACK_REJECTED == status) {
|
|
ESP_LOGE(TAG, "Update rejected");
|
|
} else if(SHADOW_ACK_ACCEPTED == status) {
|
|
ESP_LOGI(TAG, "Update accepted");
|
|
}
|
|
}
|
|
|
|
void windowActuate_Callback(const char *pJsonString, uint32_t JsonStringDataLen, jsonStruct_t *pContext) {
|
|
IOT_UNUSED(pJsonString);
|
|
IOT_UNUSED(JsonStringDataLen);
|
|
|
|
if(pContext != NULL) {
|
|
ESP_LOGI(TAG, "Delta - Window state changed to %d", *(bool *) (pContext->pData));
|
|
}
|
|
}
|
|
|
|
void aws_iot_task(void *param) {
|
|
IoT_Error_t rc = FAILURE;
|
|
|
|
char JsonDocumentBuffer[MAX_LENGTH_OF_UPDATE_JSON_BUFFER];
|
|
size_t sizeOfJsonDocumentBuffer = sizeof(JsonDocumentBuffer) / sizeof(JsonDocumentBuffer[0]);
|
|
float temperature = 0.0;
|
|
|
|
bool windowOpen = false;
|
|
jsonStruct_t windowActuator;
|
|
windowActuator.cb = windowActuate_Callback;
|
|
windowActuator.pData = &windowOpen;
|
|
windowActuator.pKey = "windowOpen";
|
|
windowActuator.type = SHADOW_JSON_BOOL;
|
|
|
|
jsonStruct_t temperatureHandler;
|
|
temperatureHandler.cb = NULL;
|
|
temperatureHandler.pKey = "temperature";
|
|
temperatureHandler.pData = &temperature;
|
|
temperatureHandler.type = SHADOW_JSON_FLOAT;
|
|
|
|
ESP_LOGI(TAG, "AWS IoT SDK Version %d.%d.%d-%s", VERSION_MAJOR, VERSION_MINOR, VERSION_PATCH, VERSION_TAG);
|
|
|
|
// initialize the mqtt client
|
|
AWS_IoT_Client mqttClient;
|
|
|
|
ShadowInitParameters_t sp = ShadowInitParametersDefault;
|
|
sp.pHost = AWS_IOT_MQTT_HOST;
|
|
sp.port = AWS_IOT_MQTT_PORT;
|
|
|
|
#if defined(CONFIG_EXAMPLE_EMBEDDED_CERTS)
|
|
sp.pClientCRT = (const char *)certificate_pem_crt_start;
|
|
sp.pClientKey = (const char *)private_pem_key_start;
|
|
sp.pRootCA = (const char *)aws_root_ca_pem_start;
|
|
#elif defined(CONFIG_EXAMPLE_FILESYSTEM_CERTS)
|
|
sp.pClientCRT = DEVICE_CERTIFICATE_PATH;
|
|
sp.pClientKey = DEVICE_PRIVATE_KEY_PATH;
|
|
sp.pRootCA = ROOT_CA_PATH;
|
|
#endif
|
|
sp.enableAutoReconnect = false;
|
|
sp.disconnectHandler = NULL;
|
|
|
|
#ifdef CONFIG_EXAMPLE_SDCARD_CERTS
|
|
ESP_LOGI(TAG, "Mounting SD card...");
|
|
sdmmc_host_t host = SDMMC_HOST_DEFAULT();
|
|
sdmmc_slot_config_t slot_config = SDMMC_SLOT_CONFIG_DEFAULT();
|
|
esp_vfs_fat_sdmmc_mount_config_t mount_config = {
|
|
.format_if_mount_failed = false,
|
|
.max_files = 3,
|
|
};
|
|
sdmmc_card_t* card;
|
|
esp_err_t ret = esp_vfs_fat_sdmmc_mount("/sdcard", &host, &slot_config, &mount_config, &card);
|
|
if (ret != ESP_OK) {
|
|
ESP_LOGE(TAG, "Failed to mount SD card VFAT filesystem.");
|
|
abort();
|
|
}
|
|
#endif
|
|
|
|
/* Wait for WiFI to show as connected */
|
|
xEventGroupWaitBits(wifi_event_group, CONNECTED_BIT,
|
|
false, true, portMAX_DELAY);
|
|
|
|
ESP_LOGI(TAG, "Shadow Init");
|
|
rc = aws_iot_shadow_init(&mqttClient, &sp);
|
|
if(SUCCESS != rc) {
|
|
ESP_LOGE(TAG, "aws_iot_shadow_init returned error %d, aborting...", rc);
|
|
abort();
|
|
}
|
|
|
|
ShadowConnectParameters_t scp = ShadowConnectParametersDefault;
|
|
scp.pMyThingName = CONFIG_AWS_EXAMPLE_THING_NAME;
|
|
scp.pMqttClientId = CONFIG_AWS_EXAMPLE_CLIENT_ID;
|
|
scp.mqttClientIdLen = (uint16_t) strlen(CONFIG_AWS_EXAMPLE_CLIENT_ID);
|
|
|
|
ESP_LOGI(TAG, "Shadow Connect");
|
|
rc = aws_iot_shadow_connect(&mqttClient, &scp);
|
|
if(SUCCESS != rc) {
|
|
ESP_LOGE(TAG, "aws_iot_shadow_connect returned error %d, aborting...", rc);
|
|
abort();
|
|
}
|
|
|
|
/*
|
|
* Enable Auto Reconnect functionality. Minimum and Maximum time of Exponential backoff are set in aws_iot_config.h
|
|
* #AWS_IOT_MQTT_MIN_RECONNECT_WAIT_INTERVAL
|
|
* #AWS_IOT_MQTT_MAX_RECONNECT_WAIT_INTERVAL
|
|
*/
|
|
rc = aws_iot_shadow_set_autoreconnect_status(&mqttClient, true);
|
|
if(SUCCESS != rc) {
|
|
ESP_LOGE(TAG, "Unable to set Auto Reconnect to true - %d, aborting...", rc);
|
|
abort();
|
|
}
|
|
|
|
rc = aws_iot_shadow_register_delta(&mqttClient, &windowActuator);
|
|
|
|
if(SUCCESS != rc) {
|
|
ESP_LOGE(TAG, "Shadow Register Delta Error");
|
|
}
|
|
temperature = STARTING_ROOMTEMPERATURE;
|
|
|
|
// loop and publish a change in temperature
|
|
while(NETWORK_ATTEMPTING_RECONNECT == rc || NETWORK_RECONNECTED == rc || SUCCESS == rc) {
|
|
rc = aws_iot_shadow_yield(&mqttClient, 200);
|
|
if(NETWORK_ATTEMPTING_RECONNECT == rc || shadowUpdateInProgress) {
|
|
rc = aws_iot_shadow_yield(&mqttClient, 1000);
|
|
// If the client is attempting to reconnect, or already waiting on a shadow update,
|
|
// we will skip the rest of the loop.
|
|
continue;
|
|
}
|
|
ESP_LOGI(TAG, "=======================================================================================");
|
|
ESP_LOGI(TAG, "On Device: window state %s", windowOpen ? "true" : "false");
|
|
simulateRoomTemperature(&temperature);
|
|
|
|
rc = aws_iot_shadow_init_json_document(JsonDocumentBuffer, sizeOfJsonDocumentBuffer);
|
|
if(SUCCESS == rc) {
|
|
rc = aws_iot_shadow_add_reported(JsonDocumentBuffer, sizeOfJsonDocumentBuffer, 2, &temperatureHandler,
|
|
&windowActuator);
|
|
if(SUCCESS == rc) {
|
|
rc = aws_iot_finalize_json_document(JsonDocumentBuffer, sizeOfJsonDocumentBuffer);
|
|
if(SUCCESS == rc) {
|
|
ESP_LOGI(TAG, "Update Shadow: %s", JsonDocumentBuffer);
|
|
rc = aws_iot_shadow_update(&mqttClient, CONFIG_AWS_EXAMPLE_THING_NAME, JsonDocumentBuffer,
|
|
ShadowUpdateStatusCallback, NULL, 4, true);
|
|
shadowUpdateInProgress = true;
|
|
}
|
|
}
|
|
}
|
|
ESP_LOGI(TAG, "*****************************************************************************************");
|
|
vTaskDelay(1000 / portTICK_RATE_MS);
|
|
}
|
|
|
|
if(SUCCESS != rc) {
|
|
ESP_LOGE(TAG, "An error occurred in the loop %d", rc);
|
|
}
|
|
|
|
ESP_LOGI(TAG, "Disconnecting");
|
|
rc = aws_iot_shadow_disconnect(&mqttClient);
|
|
|
|
if(SUCCESS != rc) {
|
|
ESP_LOGE(TAG, "Disconnect error %d", rc);
|
|
}
|
|
|
|
vTaskDelete(NULL);
|
|
}
|
|
|
|
static void initialise_wifi(void)
|
|
{
|
|
tcpip_adapter_init();
|
|
wifi_event_group = xEventGroupCreate();
|
|
ESP_ERROR_CHECK( esp_event_loop_init(event_handler, NULL) );
|
|
wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
|
|
ESP_ERROR_CHECK( esp_wifi_init(&cfg) );
|
|
ESP_ERROR_CHECK( esp_wifi_set_storage(WIFI_STORAGE_RAM) );
|
|
wifi_config_t wifi_config = {
|
|
.sta = {
|
|
.ssid = EXAMPLE_WIFI_SSID,
|
|
.password = EXAMPLE_WIFI_PASS,
|
|
},
|
|
};
|
|
ESP_LOGI(TAG, "Setting WiFi configuration SSID %s...", wifi_config.sta.ssid);
|
|
ESP_ERROR_CHECK( esp_wifi_set_mode(WIFI_MODE_STA) );
|
|
ESP_ERROR_CHECK( esp_wifi_set_config(WIFI_IF_STA, &wifi_config) );
|
|
ESP_ERROR_CHECK( esp_wifi_start() );
|
|
}
|
|
|
|
|
|
void app_main()
|
|
{
|
|
initialise_wifi();
|
|
/* Temporarily pin task to core, due to FPU uncertainty */
|
|
xTaskCreatePinnedToCore(&aws_iot_task, "aws_iot_task", 16384+1024, NULL, 5, NULL, 1);
|
|
}
|