main/co2meter.c

/*
 * co2meter project.
 */

#include "config.h"

static const char *TAG = "co2meter";

#define PIN_SDA 		(CONFIG_I2C_MASTER_SDA)
#define PIN_SCL			(CONFIG_I2C_MASTER_SCL)
#define ROT_ENC_A_GPIO		(CONFIG_ROT_ENC_A_GPIO)
#define ROT_ENC_B_GPIO		(CONFIG_ROT_ENC_B_GPIO)
#define ROT_ENC_SW_GPIO		(CONFIG_ROT_ENC_SW_GPIO)


#define ENABLE_HALF_STEPS	false		///< Set to true to enable tracking of rotary encoder at half step resolution
#define RESET_AT		0		///< Set to a positive non-zero number to reset the position if this value is exceeded
#define FLIP_DIRECTION		false		///< Set to true to reverse the clockwise/counterclockwise sense


int					Main_Loop1 = MAIN_LOOP1_INIT;	///< Loop 1 init
int					Main_Loop2 = -1;		///< Loop 2 invalid
bool                            	System_TimeOk = false;          ///< System time status
time_t                          	now;                            ///< Current time
struct tm                       	timeinfo;                       ///< Current time structure
char                            	strftime_buf[64];               ///< Time buffer
static RTC_DATA_ATTR struct timeval	sleep_enter_time;
static TaskHandle_t			xTaskDS18B20 = NULL;
static TaskHandle_t			xTaskADC = NULL;
static TaskHandle_t			xTaskWifi = NULL;
static TaskHandle_t			xTaskMQTT = NULL;
const esp_app_desc_t			*app_desc = NULL;
unit_t					units[3];			///< Pressure test units


extern DS18B20_State            	*ds18b20_state;         	///< DS18B20 state
extern SemaphoreHandle_t        	xSemaphoreDS18B20;      	///< DS18B20 lock semaphore
extern ADC_State                	*adc_state;             	///< ADC state
extern SemaphoreHandle_t        	xSemaphoreADC;          	///< ADC lock semaphore


void app_main()
{
    struct timeval	now;
    gettimeofday(&now, NULL);
    int			sleep_time_ms = (now.tv_sec - sleep_enter_time.tv_sec) * 1000 + (now.tv_usec - sleep_enter_time.tv_usec) / 1000;
    int			New_Loop2 = MAIN_LOOP2_INIT;
    esp_err_t           ret;

    Main_Loop1 = MAIN_LOOP1_INIT;
    Main_Loop2 = -1;

    switch (esp_sleep_get_wakeup_cause()) {
        case ESP_SLEEP_WAKEUP_EXT1: {
            uint64_t wakeup_pin_mask = esp_sleep_get_ext1_wakeup_status();
            if (wakeup_pin_mask != 0) {
                int pin = __builtin_ffsll(wakeup_pin_mask) - 1;
                printf("Wake up from GPIO %d\n", pin);
            } else {
                printf("Wake up from GPIO\n");
            }
            break;
        }
        case ESP_SLEEP_WAKEUP_TIMER: {
	    ESP_LOGI(TAG, "Starting from deep sleep, timer wakeup after %dms", sleep_time_ms);
            break;
        }
        case ESP_SLEEP_WAKEUP_UNDEFINED:
        default:
            ESP_LOGI(TAG, "Starting from hard reset");
    }

    const int wakeup_time_sec = 20;
    ESP_LOGI(TAG, "Enabling timer wakeup, %ds", wakeup_time_sec);
    esp_sleep_enable_timer_wakeup(wakeup_time_sec * 1000000);

//    const int ext_wakeup_pin_1 = ROT_ENC_SW_GPIO; // 25 in example, redefine to rotary name.
//    const uint64_t ext_wakeup_pin_1_mask = 1ULL << ext_wakeup_pin_1;

//    printf("Enabling EXT1 wakeup on pins GPIO%d\n", ext_wakeup_pin_1);
//    esp_sleep_enable_ext1_wakeup(ext_wakeup_pin_1_mask, ESP_EXT1_WAKEUP_ANY_HIGH); // TODO: what is the logic of the rotary button.

    // Isolate GPIO12 pin from external circuits. This is needed for modules
    // which have an external pull-up resistor on GPIO12 (such as ESP32-WROVER)
    // to minimize current consumption.
//    rtc_gpio_isolate(GPIO_NUM_12);

    app_desc = esp_ota_get_app_description();

    /*
     * Initialize NVS
     */
    ret = nvs_flash_init();
    if (ret == ESP_ERR_NVS_NO_FREE_PAGES) {
        ESP_ERROR_CHECK(nvs_flash_erase());
        ret = nvs_flash_init();
    }
    ESP_ERROR_CHECK(ret);

    /*
     * Setup the OLED display.
     * See: https://github.com/nkolban/esp32-snippets/blob/master/hardware/displays/U8G2/
     */
//    u8g2_esp32_hal_t u8g2_esp32_hal = U8G2_ESP32_HAL_DEFAULT;
//    u8g2_esp32_hal.sda = PIN_SDA;
//    u8g2_esp32_hal.scl = PIN_SCL;
//    u8g2_esp32_hal_init(u8g2_esp32_hal);

//    u8g2_t u8g2; // a structure which will contain all the data for one display
////    u8g2_Setup_ssd1306_i2c_128x32_univision_f(
//    u8g2_Setup_sh1106_i2c_128x64_noname_f(
//		&u8g2,
//		U8G2_R0,
//		//u8x8_byte_sw_i2c,
//		u8g2_esp32_i2c_byte_cb,
//		u8g2_esp32_gpio_and_delay_cb);  // init u8g2 structure
//    u8x8_SetI2CAddress(&u8g2.u8x8,0x78);

//    ESP_LOGI(TAG, "u8g2_InitDisplay");
//    u8g2_InitDisplay(&u8g2); // send init sequence to the display, display is in sleep mode after this,

//    ESP_LOGI(TAG, "u8g2_SetPowerSave");
//    u8g2_SetPowerSave(&u8g2, 0); // wake up display
//    ESP_LOGI(TAG, "u8g2_ClearBuffer");
//    u8g2_ClearBuffer(&u8g2);
//    ESP_LOGI(TAG, "u8g2_DrawBox");
//    u8g2_DrawBox(&u8g2, 0, 26, 80,6);
//    u8g2_DrawFrame(&u8g2, 0,26,100,6);

//    ESP_LOGI(TAG, "u8g2_SetFont");
//    u8g2_SetFont(&u8g2, u8g2_font_ncenB14_tr);
//    ESP_LOGI(TAG, "u8g2_DrawStr");
//    u8g2_DrawStr(&u8g2, 2,17,"Hi nkolban!");
//    ESP_LOGI(TAG, "u8g2_SendBuffer");
//    u8g2_SendBuffer(&u8g2);


    ESP_LOGI(TAG, "Initializing SPIFFS");

    esp_vfs_spiffs_conf_t conf = {
        .base_path = "/spiffs",
        .partition_label = NULL,
        .max_files = 5,
        .format_if_mount_failed = true
    };

    // Use settings defined above to initialize and mount SPIFFS filesystem.
    // Note: esp_vfs_spiffs_register is an all-in-one convenience function.
    ret = esp_vfs_spiffs_register(&conf);

    if (ret != ESP_OK) {
        if (ret == ESP_FAIL) {
            ESP_LOGE(TAG, "Failed to mount or format filesystem");
        } else if (ret == ESP_ERR_NOT_FOUND) {
            ESP_LOGE(TAG, "Failed to find SPIFFS partition");
        } else {
            ESP_LOGE(TAG, "Failed to initialize SPIFFS (%d)", ret);
        }
//        _fg = TFT_RED;
//        TFT_print((char *)"error\r\n", LASTX, LASTY);
        return; // Stop application.
    }

    size_t total = 0, used = 0;
    ret = esp_spiffs_info(NULL, &total, &used);
    if (ret != ESP_OK) {
        ESP_LOGE(TAG, "Failed to get SPIFFS partition information");
//        _fg = TFT_RED;
//        TFT_print((char *)"error\r\n", LASTX, LASTY);
        return; // Stop application.
    } else {
        ESP_LOGI(TAG, "Partition size: %d, used: %d - %d%%", total, used, (used * 100) / total);
    }

    // Just to debug, list the /spiffs filesystem.
#if 1
    DIR *dir = opendir("/spiffs");
    struct dirent* de = readdir(dir);
    while (de) {
        if (de->d_type == DT_REG) {
            printf("F ");
        }
        if (de->d_type == DT_DIR) {
            printf("D ");
        }
        printf("%s\n", de->d_name);
        de = readdir(dir);
    }
    closedir(dir);
#endif

    /*
     * Read or create configuration
     */
//    TFT_print((char *)"Ophalen configuratie ", LASTX, LASTY);
    read_config();
    read_units();

//add_station((uint8_t *)"MBSE_WLR", (uint8_t *)"abcjkltuv");
//remove_station((uint8_t *)"MBSE_WLP");
//sprintf(config.lastSSID, "%s", "BREWER");
//write_config();

    xSemaphoreDS18B20 = xSemaphoreCreateMutex();
    xSemaphoreADC = xSemaphoreCreateMutex();

    xTaskCreate(&task_ds18b20, "task_ds18b20",  2560, NULL, 8, &xTaskDS18B20);
    xTaskCreate(&task_adc,     "task_adc",      2560, NULL, 8, &xTaskADC);
    esp_log_level_set("wifi", ESP_LOG_ERROR);
    xTaskCreate(&task_wifi,    "task_wifi",     4096, NULL, 3, &xTaskWifi);
    vTaskDelay( (TickType_t)10);
    xTaskCreate(&task_mqtt,    "task_mqtt",     4096, NULL, 5, &xTaskMQTT);

    // esp32-rotary-encoder requires that the GPIO ISR service is installed before calling rotary_encoder_register()
//    ESP_ERROR_CHECK(gpio_install_isr_service(0));

    // Initialise the rotary encoder device with the GPIOs for A and B signals
//    rotary_encoder_info_t info = { 0 };
//    ESP_ERROR_CHECK(rotary_encoder_init(&info, ROT_ENC_A_GPIO, ROT_ENC_B_GPIO));
//    ESP_ERROR_CHECK(rotary_encoder_enable_half_steps(&info, ENABLE_HALF_STEPS));
#ifdef FLIP_DIRECTION
//    ESP_ERROR_CHECK(rotary_encoder_flip_direction(&info));
#endif

    // Create a queue for events from the rotary encoder driver.
    // Tasks can read from this queue to receive up to date position information.
//    QueueHandle_t event_queue = rotary_encoder_create_queue();
//    ESP_ERROR_CHECK(rotary_encoder_set_queue(&info, event_queue));


    /* Print chip information */
//    esp_chip_info_t chip_info;
//    esp_chip_info(&chip_info);
//    printf("This is ESP32 chip with %d CPU cores, WiFi%s%s, ",
//            chip_info.cores,
//            (chip_info.features & CHIP_FEATURE_BT) ? "/BT" : "",
//            (chip_info.features & CHIP_FEATURE_BLE) ? "/BLE" : "");

//    printf("silicon revision %d, ", chip_info.revision);

//    printf("%dMB %s flash\n", spi_flash_get_chip_size() / (1024 * 1024),
//            (chip_info.features & CHIP_FEATURE_EMB_FLASH) ? "embedded" : "external");

//    esp_err_t status = adc2_vref_to_gpio(GPIO_NUM_26);
//    if (status == ESP_OK) {
//        printf("v_ref routed to GPIO\n");
//    } else {
//        printf("failed to route v_ref\n");
//    }
//    vTaskDelay(1000 * wakeup_time_sec / portTICK_PERIOD_MS);

    /*
     * Main application loop.
     */
    while (1) {

	ESP_LOGI(TAG, "Entered app loop");

	/* Measure process or user input via rotary switch */
	while (1) {
	    switch (Main_Loop1) {
		case MAIN_LOOP1_INIT:
		    ESP_LOGI(TAG, "Loop timer: Init");
		    // If configured do MAIN_LOOP1_CONNECT
		    Main_Loop1 = MAIN_LOOP1_CONNECT;
		    requestWiFi_system(true);
		    request_ds18b20();
		    request_adc();
		    break;

		case MAIN_LOOP1_CONNECT:
                    if (ready_WiFi())
                        Main_Loop1 = MAIN_LOOP1_MQTT_CONNECT;
                    break;

		case MAIN_LOOP1_MQTT_CONNECT:
		    if (ready_ds18b20() && ready_adc()) {
			connect_mqtt(true);
			Main_Loop1 = MAIN_LOOP1_WAITCON;
			ESP_LOGI(TAG, "Loop timer: Wait MQTT");

			/* Get global temperature, use for all units. */
			uint32_t temp = 0;
			int state = 0;
			if (xSemaphoreTake(xSemaphoreDS18B20, 10) == pdTRUE) {
			    temp = (ds18b20_state->bottle_temperature * 1000);
			    state = (ds18b20_state->bottle_error == 0) ? 0:1;
        		    xSemaphoreGive(xSemaphoreDS18B20);
    			}

			/* Copy measured data and calculate results */
			for (int i = 0; i < 3; i++) {
			    units[i].temperature = temp;
			    units[i].temperature_state = state;
			    if (xSemaphoreTake(xSemaphoreADC, 10) == pdTRUE) {
				units[i].pressure_state = adc_state->Pressure[i].error;
				units[i].pressure_channel = adc_state->Pressure[i].channel;
				units[i].pressure_voltage = adc_state->Pressure[i].voltage;
				units[i].pressure_zero = 110;
				int P = (units[i].pressure_voltage / (adc_state->Batt_voltage / 1000) - units[i].pressure_zero) * 14; // in bar
				if (P < 0)
				    P = 0;
				units[i].pressure = P;
printf("%d volt: %d batt: %d scale: %d  bar: %d\n", i, units[i].pressure_voltage, adc_state->Batt_voltage, 
		units[i].pressure_voltage / (adc_state->Batt_voltage / 1000) - units[i].pressure_zero, P);
// Moet die echt op 5 volt?
// Verbruik 10 mA
// Setup tijd max 2 mS
				xSemaphoreGive(xSemaphoreADC);
			    }
			}
			write_units();
		    }
		    break;

		// calculate stap en data copy

		case MAIN_LOOP1_WAITCON:
		    if (ready_mqtt())
			Main_Loop1 = MAIN_LOOP1_SEND;
		    break;

		case MAIN_LOOP1_SEND:
		    ESP_LOGI(TAG, "Loop timer: Send MQTT");
		    publishNode();
		    publishUnits();

Main_Loop1 = MAIN_LOOP1_MQTT_DISCONNECT;
		    break;

		case MAIN_LOOP1_WAITACK:
		    break;

		case MAIN_LOOP1_MQTT_DISCONNECT:
		    ESP_LOGI(TAG, "Loop timer: Disconnect MQTT");
		    connect_mqtt(false);
                    Main_Loop1 = MAIN_LOOP1_DISCONNECT;
		    break;

		case MAIN_LOOP1_DISCONNECT:
		    if (! ready_mqtt()) {
			ESP_LOGI(TAG, "Loop timer: WiFi off");
		    	requestWiFi_system(false);
		    	Main_Loop1 = MAIN_LOOP1_WIFI_OFF;
		    }
		    break;

		case MAIN_LOOP1_WIFI_OFF:
		    if (! ready_WiFi()) {
			ESP_LOGI(TAG, "Loop timer: Done");
			Main_Loop1 = MAIN_LOOP1_DONE;
		    }
		    break;

		case MAIN_LOOP1_DONE:
		    break;
	    }

	    /*
	     * One time actions
	     */
	    if (New_Loop2 != Main_Loop2) {

		Main_Loop2 = New_Loop2;

		switch (Main_Loop2) {
		    case MAIN_LOOP2_INIT:
			ESP_LOGI(TAG, "Loop user: Init");
//			u8g2_SetPowerSave(&u8g2, 0); // wake up display
//			u8g2_ClearBuffer(&u8g2);
//			New_Loop2 = MAIN_LOOP2_INACTIVE;
			New_Loop2 = MAIN_LOOP2_DONE;
			break;

		    case MAIN_LOOP2_INACTIVE:
//			u8g2_SetPowerSave(&u8g2, 1); // powersave display
			New_Loop2 = MAIN_LOOP2_DONE;
			break;

		    default:
			break;
		}
	    }

	    /*
	     * Action process.
	     */
	    switch (Main_Loop2) {
	    // If wakeup from GPIO -- state machine 2
		// Init OLED
		// If not configured, start configure
		// If configured select first unit
		// New rotate position, set screen, reset waittimer
		// Handle screen (first is show measured values)
		// Count inactivity
		// flag if inactive and OLED lowpower.

	    // Break if all done and inactive.
		default:
		    break;
	    }

	    if (Main_Loop1 == MAIN_LOOP1_DONE && Main_Loop2 == MAIN_LOOP2_DONE) 
	    	break;

	    vTaskDelay(10 / portTICK_PERIOD_MS);
	}
 
//	printf("Simulate deep sleep\n");
// 	vTaskDelay(1000 * wakeup_time_sec / portTICK_PERIOD_MS);
  
	printf("Entering deep sleep\n");
    	gettimeofday(&sleep_enter_time, NULL);
	esp_deep_sleep_start();

	Main_Loop1 = MAIN_LOOP1_INIT;
	New_Loop2 = MAIN_LOOP2_INIT;
    }

}