ESP32-Mesh-OTA/main/Blinky_LED.c

/**
* @file Blinky_LED.c
* @brief Demo application using the mesh network
* @author Hendrik Schutter
* @date 20.01.2021
*
* Additional Infos: If button "BOOT" on ESP32-Module is pressed, all LED2 (blue) in the network will toggle the state.
*/

#include "Blinky_LED.h"

static const char *LOG_TAG = "blinky_led";
static bool bLEDisOn = false; //set led default off
static mesh_addr_t addrParent; //addr of parent node
static mesh_addr_t childrenAddr[CONFIG_MESH_ROUTE_TABLE_SIZE]; //array of children attached to this node
static uint16_t u16ChildrenSize; //number of children attached to this node
xQueueHandle queueBlinkyLEDPackets; //handle for led action queue

/**
* @fn esp_err_t errBlinkyLEDInitialize()
* @brief Starts the demp app
* @param void
* @return ESP32 error code
* @author Hendrik Schutter
* @date 20.01.2021
*
* Initialize the queue and starts the tasks
*/
esp_err_t errBlinkyLEDInitialize(void)
{
    esp_err_t err = ESP_OK;
    BaseType_t xReturned;

    vGPIOInitialize();

    //create queue to store led action created from BTN and mesh network events
    queueBlinkyLEDPackets = xQueueCreate(5, sizeof(BLINKY_PACKET_t));
    if (queueBlinkyLEDPackets == 0)  // Queue not created
        {
            ESP_LOGE(LOG_TAG, "Unable to create Queue for Application Packets");
            err = ESP_FAIL;
        }

    //register the receiver handle in mesh network
    ERROR_CHECK(errMeshNetworkSetAppReceiveHandle(rxHandle));

    if(err == ESP_OK)
        {
            xReturned = xTaskCreate(vTaskReadUserInput, "vTaskReadUserInput", 4096, NULL, 5, NULL);
            if(xReturned != pdPASS)
                {
                    err = ESP_FAIL;
                }
        }

    if(err == ESP_OK)
        {
            xReturned = xTaskCreate(vTaskReceiveData, "vTaskReceiveData", 4096, NULL, 5, NULL);
            if(xReturned != pdPASS)
                {
                    err = ESP_FAIL;
                }
        }
    return err;
}

/**
* @fn void vGPIOInitialize(void)
* @brief sets the GPIO pins to correct modes
* @param void
* @return void
* @author Hendrik Schutter
* @date 20.01.2021
*
* Initialize GPIO
*/
void vGPIOInitialize(void)
{
    gpio_config_t gpioConf;

    //LED as Output
    gpio_reset_pin(GPIO_LED);
    gpio_set_direction(GPIO_LED, GPIO_MODE_OUTPUT);

    //BTN as Input
    gpioConf.intr_type = GPIO_INTR_DISABLE;
    gpioConf.mode = GPIO_MODE_INPUT;
    gpioConf.pin_bit_mask = GPIO_INPUT_PIN_SEL;
    gpioConf.pull_down_en = 0;
    gpioConf.pull_up_en = 1;
    gpio_config(&gpioConf);
}

/**
* @fn void rxHandle(const uint8_t* const pu8Data, const uint8_t* const pu8Sender)
* @brief callback handler from mesh network layer
* @param pu8Data data received
* @param pu8Sender sender node from data
* @return void
* @author Hendrik Schutter
* @date 20.01.2021
*
* Adds the data into queue
*/
void rxHandle(const uint8_t* const pu8Data, const uint8_t* const pu8Sender)
{
    //send payload to app queue
    BLINKY_PACKET_t bTmpPacket;
    memcpy(&bTmpPacket, (uint8_t *)pu8Data, sizeof(BLINKY_PACKET_t));
    memcpy(&bTmpPacket.meshSenderAddr, (uint8_t *)pu8Sender, 6); //copy MAC from sender into app packet
    if (xQueueSend(queueBlinkyLEDPackets, &bTmpPacket, portMAX_DELAY) != pdPASS)
        {
            ESP_LOGE(LOG_TAG, "Unable to push packet from mesh into Queue");
        }
}

/**
* @fn void vTaskReadUserInput(void *arg)
* @brief FreeRTOS task reading the user input (button)
* @param args parameter for task
* @return void
* @author Hendrik Schutter
* @date 20.01.2021
*
* Adds a button press to the queue
*/
void vTaskReadUserInput(void *arg)
{
    esp_err_t err = ESP_OK;
    BLINKY_PACKET_t bTmpPacket;
    MESH_PACKET_t meshPacket;

    bTmpPacket.type = LED_OFF; //default off
    meshPacket.type = APP_Data; //this is a app packet

    while(true)
        {
            //check for BTN press
            if(gpio_get_level(GPIO_BOOT_BTN) == 0)
                {
                    err = ESP_OK;

                    if(bLEDisOn == false)
                        {
                            bTmpPacket.type = LED_ON;
                        }
                    else
                        {
                            bTmpPacket.type = LED_OFF;
                        }

                    //push led action into queue
                    if (xQueueSend(queueBlinkyLEDPackets, &bTmpPacket, portMAX_DELAY) != pdPASS)
                        {
                            ESP_LOGE(LOG_TAG, "Unable to push packet into queue");
                        }

                    memcpy(meshPacket.au8Payload, &bTmpPacket, sizeof(BLINKY_PACKET_t));

                    if(bMeshNetworkIsRootNode() == false)
                        {
                            //this node is not root --> send led action to parent
                            ERROR_CHECK(errMeshNetworkGetParentNode(&addrParent));
                            ERROR_CHECK(errMeshNetworkSendMeshPacket(&addrParent, &meshPacket));
                        }
                    else
                        {
                            //this node is root --> send led action to children
                            ERROR_CHECK(errMeshNetworkGetChildren(childrenAddr, &u16ChildrenSize));

                            for (uint16_t u16Index = 0; u16Index < u16ChildrenSize; u16Index++)
                                {
                                    ERROR_CHECK (errMeshNetworkSendMeshPacket(&childrenAddr[u16Index], &meshPacket));
                                }
                        }
                    vTaskDelay(200 / portTICK_PERIOD_MS);
                }
            vTaskDelay(50 / portTICK_PERIOD_MS);
        }
}

/**
* @fn void vTaskReceiveData(void *arg)
* @brief FreeRTOS task reading queue and setting the LED
* @param args parameter for task
* @return void
* @author Hendrik Schutter
* @date 20.01.2021
*
* Sets the LED off or on based on data in queue
*/
void vTaskReceiveData(void *arg)
{
    esp_err_t err = ESP_OK;
    MESH_PACKET_t meshPacket;
    BLINKY_PACKET_t bTmpPacket;

    bTmpPacket.type = LED_OFF; //default off
    meshPacket.type = APP_Data; //this is a app packet

    while (1)
        {
            if (xQueueReceive(queueBlinkyLEDPackets, &bTmpPacket, portMAX_DELAY) != pdTRUE)
                {
                    ESP_LOGE(LOG_TAG, "Unable to receive packet from Queue");
                }
            else
                {
                    err = ESP_OK;
                    //Successfully RECEIVED the packet
                    switch (bTmpPacket.type)
                        {
                        case LED_ON:
                            bLEDisOn = true;
                            gpio_set_level(GPIO_LED, 1); //switch on
                            ESP_LOGI(LOG_TAG,"switch LED ON");
                            break;

                        case LED_OFF:
                            bLEDisOn = false;
                            gpio_set_level(GPIO_LED, 0); //switch off
                            ESP_LOGI(LOG_TAG,"switch LED OFF");
                            break;

                        default:
                            bLEDisOn = false;
                            gpio_set_level(GPIO_LED, 0); //switch off
                            ESP_LOGI(LOG_TAG,"switch LED OFF");
                            break;
                        }
                }

            ERROR_CHECK(errMeshNetworkGetChildren(childrenAddr, &u16ChildrenSize)); //get all children attached to this node
            memcpy(meshPacket.au8Payload, &bTmpPacket, sizeof(BLINKY_PACKET_t)); //copy led action in mesh packet payload

            for (uint16_t u16Index = 0; u16Index < u16ChildrenSize; u16Index++)
                {
                    //loop through children
                    if(bMeshNetworkCheckMacEquality(bTmpPacket.meshSenderAddr.addr,  childrenAddr[u16Index].addr) == false) //exclude the sender node
                        {
                            ERROR_CHECK (errMeshNetworkSendMeshPacket(&childrenAddr[u16Index], &meshPacket)); //send to child
                        }
                }
            vTaskDelay(200 / portTICK_PERIOD_MS);
        }
}