arthurr/esp-air-monitor
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Figured out how to turn on PSRAM

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Now it looks like you can just allocate from a regular "malloc"
Code ran successfully (afaict) when writing to 7MB - didn't seem
to when doing 8MB. Not 100% sure why, but I don't think it'll
matter tbh
This commit is contained in:
Arthur Roberts
2023-10-24 20:32:45 +01:00
parent d8c6ef5c8b
commit 5efca6b3c0
3 changed files with 27 additions and 6 deletions
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4
README.md
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@@ -1,4 +1,4 @@
# ESP Air Monitor # Yet Another eSP Air Monitor - YASPAM
Skeletal idea for an esp based air monitor. Skeletal idea for an esp based air monitor.
@@ -6,7 +6,7 @@ Skeletal idea for an esp based air monitor.
I have used the following: I have used the following:
* ESP32-S3 (although as far as I know, I'm not using any special features... and should work on any esp) * ESP32-S3 (although as far as I know, I'm not using any special features... and should work on any esp).
* DHT22 * DHT22
* PMS5003 * PMS5003

3
components/dht22/dht22.c
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@@ -1,5 +1,6 @@
#include "dht22.h" #include "dht22.h"
#include "sdkconfig.h" #include "sdkconfig.h"
#include "esp_log.h"
#define DATA_GPIO CONFIG_DHT22_DATA_GPIO #define DATA_GPIO CONFIG_DHT22_DATA_GPIO
@@ -15,7 +16,6 @@ deci_degrees_c _dht22_temperature = INT16_MIN;
dht22_error dht22_read() { dht22_error dht22_read() {
uint8_t data[5] = {0}; uint8_t data[5] = {0};
// TODO: Actually figure out how to read the data from the chip. // 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
@@ -28,6 +28,7 @@ dht22_error dht22_read() {
if (checksum_val != data[4]) { if (checksum_val != data[4]) {
_dht22_relative_humidity = UINT16_MAX; _dht22_relative_humidity = UINT16_MAX;
_dht22_temperature = INT16_MIN; _dht22_temperature = INT16_MIN;
ESP_LOGE(TAG, "Error in final checksum check");
return DHT22_CHECKSUM_ERROR; return DHT22_CHECKSUM_ERROR;
} }

26
main/main.c
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@@ -1,4 +1,4 @@
/* /**
* Author: Arthur Roberts (c) 2023 * Author: Arthur Roberts (c) 2023
* *
* License: GPLv3+ * License: GPLv3+
@@ -8,11 +8,31 @@
#include "freertos/FreeRTOS.h" #include "freertos/FreeRTOS.h"
#include "freertos/task.h" #include "freertos/task.h"
#include "dht22.h" #include "dht22.h"
#include "esp_log.h"
#include "esp_wifi.h"
static const char *TAG = "YASPAM";
struct air_monitor_data {
#ifdef CONFIG_DHT22_DATA_GPIO
deci_percent dht22_relative_humidity;
deci_degrees_c dht22_temperature;
#endif /* CONFIG_DHT22_DATA_GPIO */
#ifdef CONFIG_PMS5003_DATA_GPIO
// TODO
#endif /* CONFIG_PMS5003_DATA_GPIO */
int64_t time; // TODO think about how best to store this.
};
void app_main(void) void app_main(void)
{ {
int ret = dht22_temperature(); #ifdef CONFIG_DHT22_DATA_GPIO
printf("Hello world! - dhtRet: %i\n", ret); int ret = dht22_read();
#endif /* CONFIG_DHT22_DATA_GPIO */
for (int i = 10; i >= 0; i--) { for (int i = 10; i >= 0; i--) {
printf("Restarting in %d seconds...\n", i); printf("Restarting in %d seconds...\n", i);
vTaskDelay(1000 / portTICK_PERIOD_MS); vTaskDelay(1000 / portTICK_PERIOD_MS);