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This commit is contained in:
Arthur Roberts
2023-10-28 17:28:13 +01:00
parent ebd2909d15
commit 5c6a89df87
6 changed files with 116 additions and 131 deletions
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13
components/dht22/dht22.c
View File

@@ -1,6 +1,6 @@
#include "dht22.h"
#include "sdkconfig.h"
#include "esp_log.h"
#include "sdkconfig.h"
#define DATA_GPIO CONFIG_DHT22_DATA_GPIO
@@ -27,7 +27,8 @@ dht22_error dht22_read() {
// TODO: Actually figure out how to read the data from the chip.
// TODO test that data[x] << 8 will be promoted to 16bits otherwise I'm shifting them to just zeros
// TODO test that data[x] << 8 will be promoted to 16bits otherwise I'm
// shifting them to just zeros
_dht22_relative_humidity = data[0] << 8 | data[1];
_dht22_temperature = (data[2] & 0x7f) << 8 | data[3];
if (data[2] & 0x80) {
@@ -43,9 +44,5 @@ dht22_error dht22_read() {
return DHT22_OK;
}
deci_percent dht22_relative_humidity() {
return _dht22_relative_humidity;
}
deci_degrees_c dht22_temperature() {
return _dht22_temperature;
}
deci_percent dht22_relative_humidity() { return _dht22_relative_humidity; }
deci_degrees_c dht22_temperature() { return _dht22_temperature; }

2
components/dht22/dht22.h
View File

@@ -15,5 +15,3 @@ void dht22_handle_error();
deci_percent dht22_relative_humidity();
deci_degrees_c dht22_temperature();
dht22_error dht22_read();

43
components/wifi/wifi.c
View File

@@ -1,10 +1,10 @@
#include "wifi.h"
#include <string.h>
#include "freertos/FreeRTOS.h"
#include "esp_sntp.h"
#include "esp_wifi.h"
#include "esp_event.h"
#include "esp_log.h"
#include "esp_sntp.h"
#include "esp_wifi.h"
#include "freertos/FreeRTOS.h"
#include <string.h>
static const char *TAG = "WIFI";
@@ -13,22 +13,18 @@ static bool ntp_time_obtained = false;
#define WIFI_CONNECTED_BIT (1 << 0)
bool has_ntp_time_obtained_once() {
return ntp_time_obtained;
}
bool has_ntp_time_obtained_once() { return ntp_time_obtained; }
static void event_handler(void *arg, esp_event_base_t event_base,
int32_t event_id, void* event_data)
{
int32_t event_id, void *event_data) {
if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_START) {
esp_wifi_connect();
ESP_LOGI(TAG, "connecting...");
}
else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED) {
} else if (event_base == WIFI_EVENT &&
event_id == WIFI_EVENT_STA_DISCONNECTED) {
esp_wifi_connect();
ESP_LOGI(TAG, "connect to the AP fail - trying to reconnect");
}
else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {
} else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {
ip_event_got_ip_t *event = (ip_event_got_ip_t *)event_data;
ESP_LOGI(TAG, "got ip:" IPSTR, IP2STR(&event->ip_info.ip));
xEventGroupSetBits(s_wifi_event_group, WIFI_CONNECTED_BIT);
@@ -48,19 +44,14 @@ void start_wifi() {
esp_event_handler_instance_t instance_any_id;
esp_event_handler_instance_t instance_got_ip;
ESP_ERROR_CHECK(esp_event_handler_instance_register(WIFI_EVENT,
ESP_EVENT_ANY_ID,
&event_handler,
NULL,
&instance_any_id));
ESP_ERROR_CHECK(esp_event_handler_instance_register(IP_EVENT,
IP_EVENT_STA_GOT_IP,
&event_handler,
NULL,
&instance_got_ip));
ESP_ERROR_CHECK(esp_event_handler_instance_register(
WIFI_EVENT, ESP_EVENT_ANY_ID, &event_handler, NULL, &instance_any_id));
ESP_ERROR_CHECK(esp_event_handler_instance_register(
IP_EVENT, IP_EVENT_STA_GOT_IP, &event_handler, NULL, &instance_got_ip));
wifi_config_t wifi_config = {
.sta = {
.sta =
{
.ssid = CONFIG_WIFI_SSID,
.password = CONFIG_WIFI_PASSWORD,
.failure_retry_cnt = 20,
@@ -73,7 +64,8 @@ void start_wifi() {
ESP_LOGI(TAG, "wifi_init_sta finished.");
// Wait for WiFi to connect
xEventGroupWaitBits(s_wifi_event_group, WIFI_CONNECTED_BIT, pdFALSE, pdFALSE, portMAX_DELAY);
xEventGroupWaitBits(s_wifi_event_group, WIFI_CONNECTED_BIT, pdFALSE, pdFALSE,
portMAX_DELAY);
esp_sntp_setservername(0, "pool.ntp.org");
esp_sntp_setoperatingmode(SNTP_OPMODE_POLL);
sntp_set_sync_status(SNTP_SYNC_STATUS_RESET);
@@ -83,7 +75,6 @@ void start_wifi() {
setenv("TZ", "GMT0BST,M3.5.0/1,M10.5.0", 1);
tzset();
for (uint32_t i = 0; i < 20; ++i) {
if (sntp_get_sync_status() != SNTP_SYNC_STATUS_COMPLETED) {
ESP_LOGI(TAG, "... waiting for time update");

4
components/wifi/wifi.h
View File

@@ -3,8 +3,8 @@
#include <stdbool.h>
// The idea with this function is to check if NTP time has been obtained
// at least once - and therefore time is at least vaguely accurate
// I want to call this when saving data to know whether the time is valid/trusted
// at all
// I want to call this when saving data to know whether the time is
// valid/trusted at all
bool has_ntp_time_obtained_once();
// Probably should rename this to "start networking" or something because

43
main/main.c
View File

@@ -5,8 +5,6 @@
*/
#include "dht22.h"
#include "sdkconfig.h"
#include "wifi.h"
#include "esp_log.h"
#include "esp_sntp.h"
#include "freertos/FreeRTOS.h"
@@ -14,6 +12,8 @@
#include "freertos/task.h"
#include "nvs_flash.h"
#include "portmacro.h"
#include "sdkconfig.h"
#include "wifi.h"
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
@@ -38,9 +38,7 @@ typedef struct {
#ifdef CONFIG_PMS5003_ENABLED
#include "pms5003.h"
void
read_from_pms5003()
{
void read_from_pms5003() {
while (run_pms5003) {
// TODO: actually collect some data
ESP_LOGI(TAG, "Got PMS5003 data!");
@@ -79,14 +77,16 @@ void read_from_dht22() {
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 (time changing from 1970 -> current time within a 10 min period)
// 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 (time changing from 1970 -> current time within
// a 10 min period)
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
// 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;
latest_datapoint.time.myt_min = timeinfo->tm_min;
latest_datapoint.time.myt_hour = timeinfo->tm_hour;
@@ -102,20 +102,23 @@ void read_from_dht22() {
(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;
(latest_datapoint.temp - ten_minute_rolling_average.temp) /
num_samples_last_ten_mins;
}
num_samples_last_ten_mins += 1;
// This should be: if (number of samples in 10 mins taken)
// This _will_ break if sampled too quickly, because we'll have more samples per 10 minutes
// than can be stored in a uint32 - I'll calculate what that is and perhaps raise a compile
// error if too high.
// This _will_ break if sampled too quickly, because we'll have more
// samples per 10 minutes than can be stored in a uint32 - I'll
// calculate what that is and perhaps raise a compile error if too high.
if (num_samples_last_ten_mins >=
(CONFIG_DHT22_PERIOD_POLL * 1000 * 60 * 10)) {
num_samples_last_ten_mins = 0;
// 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
// 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
}
}
}
@@ -124,9 +127,7 @@ void read_from_dht22() {
}
#endif /* CONFIG DHT22_ENABLED */
void
app_main(void)
{
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) {
@@ -136,8 +137,7 @@ app_main(void)
ESP_ERROR_CHECK(ret);
#ifdef CONFIG_DHT22_ENABLED
xTaskCreate(read_from_dht22,
"DHT22",
xTaskCreate(read_from_dht22, "DHT22",
4 * 1024, // honestly I have _no_ idea
NULL,
5, // no idea either
@@ -147,8 +147,7 @@ app_main(void)
#ifdef CONFIG_PMS5003_ENABLED
xTaskCreate(read_from_pms5003,
"PMS5003",
xTaskCreate(read_from_pms5003, "PMS5003",
4 * 1024, // honestly I have _no_ idea
NULL,
5, // no idea either