/** * Author: Arthur Roberts (c) 2023 * * License: GPLv3+ */ #include "dht22.h" #include "esp_log.h" #include "esp_sntp.h" #include "freertos/FreeRTOS.h" #include "freertos/projdefs.h" #include "freertos/task.h" #include "nvs_flash.h" #include "portmacro.h" #include "sdkconfig.h" #include "wifi.h" #include #include #include #include static const char *TAG = "YASPAM"; static volatile bool run_dht = true; static volatile bool run_pms5003 = true; static TaskHandle_t dht22_handle = NULL; static TaskHandle_t pms5003_handle = NULL; typedef struct { uint8_t myt_sec; // 0 -> 61 uint8_t myt_min; // 0 -> 69 uint8_t myt_hour; // 0 -> 23 uint8_t myt_day; // 1 -> 31 uint8_t myt_month; // 0 -> 11 !! uint8_t myt_year; // years since 1900 } my_time; #ifdef CONFIG_PMS5003_ENABLED #include "pms5003.h" void read_from_pms5003() { while (run_pms5003) { // TODO: actually collect some data ESP_LOGI(TAG, "Got PMS5003 data!"); // TODO: Write the data out somewhere vTaskDelay(pdMS_TO_TICKS(CONFIG_PMS5003_PERIOD_POLL)); } } #endif /* CONFIG_PMS5003_ENABLED */ #ifdef CONFIG_DHT22_ENABLED #include "dht22.h" typedef struct { deci_percent rh; deci_degrees_c temp; my_time time; } my_dht22_data; my_dht22_data latest_datapoint; my_dht22_data ten_minute_rolling_average; uint32_t num_samples_last_ten_mins = 0; void read_from_dht22() { // From datasheet: // - Don't start within 1 second of powering on vTaskDelay(pdMS_TO_TICKS(1000)); while (run_dht) { int ret = dht22_read(); if (ret != DHT22_OK) { dht22_handle_error(ret); } else { latest_datapoint.temp = dht22_temperature(); latest_datapoint.rh = dht22_relative_humidity(); if (has_ntp_time_obtained_once()) { // I _think_ I only want to be doing that rolling average and saving // if/when we've got an actual time to do that with. I think that'd // avoid some weird bugs (e.g. time changing from 1970 -> current time within // a 10 min period or just saving data saying it's from the 70s) /* * Appears to be a bug when hitting num samples = 64 * Here's a log: W (327852) YASPAM: temperature: 19.500000 & relative humidity: 64.000000 W (327852) YASPAM: ten_minute_average.temp: 195, num_samples: 62 W (332862) YASPAM: temperature: 19.400000 & relative humidity: 64.100000 W (332862) YASPAM: ten_minute_average.temp: 2309, num_samples: 63 W (337872) YASPAM: temperature: 19.500000 & relative humidity: 64.300000 W (337872) YASPAM: ten_minute_average.temp: 18919, num_samples: 64 W (342882) YASPAM: temperature: 19.400000 & relative humidity: 64.200000 W (342882) YASPAM: ten_minute_average.temp: 18626, num_samples: 65 W (347892) YASPAM: temperature: 19.500000 & relative humidity: 64.400000 W (347892) YASPAM: ten_minute_average.temp: 34474, num_samples: 66 W (352902) YASPAM: temperature: 19.300000 & relative humidity: 64.300000 W (352912) YASPAM: ten_minute_average.temp: 34947, num_samples: 67 W (357912) YASPAM: temperature: 19.300000 & relative humidity: 64.500000 W (357912) YASPAM: ten_minute_average.temp: 35406, num_samples: 68 W (362922) YASPAM: temperature: 19.400000 & relative humidity: 64.600000 W (362922) YASPAM: ten_minute_average.temp: 35851, num_samples: 69 Another log - suggesting it's not to do with 64: I (387992) YASPAM: ten_minute_average.temp: 187, num_samples: 74 W (392992) YASPAM: temperature: 18.700000 & relative humidity: 69.900000 I (393002) YASPAM: ten_minute_average.temp: 187, num_samples: 75 W (398002) YASPAM: temperature: 18.600000 & relative humidity: 69.900000 I (398012) YASPAM: ten_minute_average.temp: 53489, num_samples: 76 W (403012) YASPAM: temperature: 18.800000 & relative humidity: 69.900000 I (403022) YASPAM: ten_minute_average.temp: 53649, num_samples: 77 W (408022) YASPAM: temperature: 18.700000 & relative humidity: 69.800000 I (408032) YASPAM: ten_minute_average.temp: 53805, num_samples: 78 W (413032) YASPAM: temperature: 18.800000 & relative humidity: 69.600000 Something overrunning and stomping on my bits? */ if (num_samples_last_ten_mins == 0) { ten_minute_rolling_average.rh = latest_datapoint.rh; ten_minute_rolling_average.temp = latest_datapoint.temp; } else { ten_minute_rolling_average.rh += (latest_datapoint.rh - ten_minute_rolling_average.rh) / num_samples_last_ten_mins; ten_minute_rolling_average.temp += (latest_datapoint.temp - ten_minute_rolling_average.temp) / num_samples_last_ten_mins; } num_samples_last_ten_mins += 1; ESP_LOGI(TAG, "latest_datapoint.temp: %"PRIi16, latest_datapoint.temp); ESP_LOGI(TAG, "ten_minute_average.temp: %"PRIi16", num_samples: %"PRIu32, ten_minute_rolling_average.temp, num_samples_last_ten_mins); // This should be: if (10 minutes of sample taken) // TODO: check max samples / second that can fit in 10 minutes if (num_samples_last_ten_mins >= ((uint32_t)CONFIG_DHT22_PERIOD_POLL * 1000 * 60 * 10)) { ESP_LOGW(TAG, "10 minutes of samples collected. Average temp: %i", ten_minute_rolling_average.temp); num_samples_last_ten_mins = 0; time_t epoch; time(&epoch); struct tm *timeinfo = localtime(&epoch); // There must be a better way - I couldn't figure out how to do it // nicely all at once latest_datapoint.time.myt_sec = timeinfo->tm_sec; // -5 to get the middle of the averaged window latest_datapoint.time.myt_min = timeinfo->tm_min - 5; latest_datapoint.time.myt_hour = timeinfo->tm_hour; latest_datapoint.time.myt_day = timeinfo->tm_mday; latest_datapoint.time.myt_month = timeinfo->tm_mon; latest_datapoint.time.myt_year = timeinfo->tm_year; // TODO: Write the data out somewhere - into RAM maybe // TODO: maybe push the data somewhere - or put a flag up that data // can be pushed // ^ could do a cute Semaphore thingy here - I don't think I've // actually used one before } } } vTaskDelay(pdMS_TO_TICKS(CONFIG_DHT22_PERIOD_POLL)); } } #endif /* CONFIG DHT22_ENABLED */ void app_main(void) { esp_err_t ret = nvs_flash_init(); if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) { ESP_ERROR_CHECK(nvs_flash_erase()); ret = nvs_flash_init(); } ESP_ERROR_CHECK(ret); #ifdef CONFIG_DHT22_ENABLED xTaskCreate(read_from_dht22, "DHT22", 4 * 1024, // honestly I have _no_ idea NULL, 5, // no idea either &dht22_handle); #endif /* CONFIG_DHT22_ENABLED */ #ifdef CONFIG_PMS5003_ENABLED xTaskCreate(read_from_pms5003, "PMS5003", 4 * 1024, // honestly I have _no_ idea NULL, 5, // no idea either &pms5003_handle); #endif /* CONFIG_PMS5003_ENABLED */ start_wifi(); }