Hello,
I a doing a ticket because I don't understand why my dht sensor doesn't fetch with my nrf54L15DK board.
Here is my overlay file :
/*
* Device Tree overlay for DHT sensor sample on Arduino Giga R1 WiFi (M7 Core)
* Connect the DHT sensor's data pin to Arduino pin D7 (PB4).GPIO_ACTIVE_LOW | GPIO_PULL_UP
* For DHT11 Sensor.
*/
/ {
aliases {
/* Assign dht0 alias to our defined DHT sensor node */
dht0 = &dht_sensor;
};
/* Define the DHT sensor node */
dht_sensor: dht_sensor {
compatible = "aosong,dht";
label = "DHT_SENSOR";
#address-cells = <1>;
#size-cells = <0>;
/* Specify the GPIO pin connection and enable the pull-up */
dio-gpios = <&gpio1 12 (GPIO_ACTIVE_HIGH | GPIO_PULL_UP)>;
/* Enable the device */
status = "okay";
};
};
my prj.conf file :
CONFIG_STDOUT_CONSOLE=y
CONFIG_SENSOR=y
CONFIG_SENSOR_ASYNC_API=y
CONFIG_DHT_LOCK_IRQS=y
and my main.c file :
/*
* Copyright (c) 2023 Ian Morris
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <stdio.h>
#include <stdlib.h>
#include <zephyr/device.h>
#include <zephyr/sys/util_macro.h>
#include <zephyr/kernel.h>
#include <zephyr/drivers/sensor.h>
#include <zephyr/drivers/sensor_data_types.h>
#include <zephyr/rtio/rtio.h>
#include <zephyr/dsp/print_format.h>
#define DHT_ALIAS(i) DT_ALIAS(_CONCAT(dht, i))
#define DHT_DEVICE(i, _) \
IF_ENABLED(DT_NODE_EXISTS(DHT_ALIAS(i)), (DEVICE_DT_GET(DHT_ALIAS(i)),))
/* Support up to 10 temperature/humidity sensors */
static const struct device *const sensors[] = {LISTIFY(10, DHT_DEVICE, ())};
#define DHT_IODEV(i, _) \
IF_ENABLED(DT_NODE_EXISTS(DHT_ALIAS(i)), \
(SENSOR_DT_READ_IODEV(_CONCAT(dht_iodev, i), DHT_ALIAS(i), \
{SENSOR_CHAN_AMBIENT_TEMP, 0}, \
{SENSOR_CHAN_HUMIDITY, 0})))
LISTIFY(10, DHT_IODEV, (;));
#define DHT_IODEV_REF(i, _) \
COND_CODE_1(DT_NODE_EXISTS(DHT_ALIAS(i)), (CONCAT(&dht_iodev, i)), (NULL))
static struct rtio_iodev *dht_iodev[] = { LISTIFY(10, DHT_IODEV_REF, (,)) };
RTIO_DEFINE(dht_ctx, 1, 1);
int main(void)
{
int rc;
for (size_t i = 0; i < ARRAY_SIZE(sensors); i++) {
if (!device_is_ready(sensors[i])) {
printk("sensor: device %s not ready.\n", sensors[i]->name);
return 0;
}
}
while (1) {
printk("Waiting for sensor to stabilize...\n");
k_sleep(K_SECONDS(2));
for (size_t i = 0; i < ARRAY_SIZE(sensors); i++) {
struct device *dev = (struct device *) sensors[i];
uint8_t buf[128];
rc = sensor_read(dht_iodev[i], &dht_ctx, buf, 128);
if (rc != 0) {
printk("%s: sensor_read() failed: %d\n", dev->name, rc);
return rc;
}
const struct sensor_decoder_api *decoder;
rc = sensor_get_decoder(dev, &decoder);
if (rc != 0) {
printk("%s: sensor_get_decode() failed: %d\n", dev->name, rc);
return rc;
}
uint32_t temp_fit = 0;
struct sensor_q31_data temp_data = {0};
decoder->decode(buf,
(struct sensor_chan_spec) {SENSOR_CHAN_AMBIENT_TEMP, 0},
&temp_fit, 1, &temp_data);
uint32_t hum_fit = 0;
struct sensor_q31_data hum_data = {0};
decoder->decode(buf,
(struct sensor_chan_spec) {SENSOR_CHAN_HUMIDITY, 0},
&hum_fit, 1, &hum_data);
printk("%16s: temp is %s%d.%d °C humidity is %s%d.%d RH\n", dev->name,
PRIq_arg(temp_data.readings[0].temperature, 2, temp_data.shift),
PRIq_arg(hum_data.readings[0].humidity, 2, hum_data.shift));
}
k_msleep(1000);
}
return 0;
}
the DHT sensor is well activated in KUI Config :
thank you in advance !
