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