49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
/*
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*
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* This sample code is in the public domain.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "espressif/esp_common.h"
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#include "esp/uart.h"
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#include "FreeRTOS.h"
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#include "task.h"
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#include "dht.h"
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#include "esp8266.h"
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/* An example using the ubiquitous DHT** humidity sensors
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* to read and print a new temperature and humidity measurement
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* from a sensor attached to GPIO pin 4.
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*/
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uint8_t const dht_gpio = 4;
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void dhtMeasurementTask(void *pvParameters)
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{
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int16_t temperature = 0;
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int16_t humidity = 0;
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// DHT sensors that come mounted on a PCB generally have
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// pull-up resistors on the data pin. It is recommended
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// to provide an external pull-up resistor otherwise...
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gpio_set_pullup(dht_gpio, false, false);
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while(1) {
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if (dht_read_data(dht_gpio, &humidity, &temperature)) {
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printf("Humidity: %d%% Temp: %dC\n",
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humidity / 10,
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temperature / 10);
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} else {
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printf("Could not read data from sensor\n");
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}
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// Three second delay...
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vTaskDelay(3000 / portTICK_RATE_MS);
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}
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}
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void user_init(void)
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{
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uart_set_baud(0, 115200);
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xTaskCreate(dhtMeasurementTask, "dhtMeasurementTask", 256, NULL, 2, NULL);
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}
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