Hello,
I send you a message because I try to do work a sensor of type DHT11.
I am a beginner with Nordic SDK, I use VS Code to develop and NRF5340DK board.
I connect the sensor to a gpio pin that I write in overlay file file.
The card "see" the sensor but I din't fetch samples, I don't know why.
Here is my prjconf file :
CONFIG_CBPRINTF_FP_SUPPORT=y
CONFIG_GPIO=y
CONFIG_ADC=y
CONFIG_SENSOR=y
CONFIG_NTC_THERMISTOR=y
CONFIG_LOG=y
And my main.c file :
#include <zephyr/kernel.h>
#include <zephyr/sys/printk.h>
#include <zephyr/device.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/devicetree.h>
#include <zephyr/drivers/sensor.h>
#define SLEEP_TIME_MS 100
//if(!device_is_ready(button.port)){
// return -1;
//}
/* #define OW_NODE DT_NODELABEL(ow_button)
static const struct gpio_dt_spec ow_gpio = GPIO_DT_SPEC_GET(OW_NODE, gpios); */
int main(void)
{
//int ret = gpio_pin_configure_dt(&button, GPIO_INPUT);
//if (ret < 0) {
//return -1;
//}
//bool val = gpio_pin_get_dt(&button);
//printk("%B\n", val);
//nrf_gpio_cfg_input(GPIO_PIN, NRF_GPIO_PIN_PULLUP);
/* const struct device *ow_bus = device_get_binding("OW_GPIO");
if (!ow_bus) {
printk("GPIO device bus not found!\n");
//return 1;
}
gpio_dev = device_get_binding(ONE_WIRE_PORT);
if (!gpio_dev) {
printk("GPIO device not found!\n");
return 1;
}
int ret = gpio_pin_configure(gpio_dev, 0, GPIO_OUTPUT | GPIO_OPEN_DRAIN | GPIO_PULL_UP);
if (ret < 0) {
printk("Failed to configure pin\n");
} */
/* if (!device_is_ready(ow_gpio.port)) {
printk("GPIO device not ready!\n");
}
int ret = gpio_pin_configure_dt(&ow_gpio, GPIO_OUTPUT | GPIO_OPEN_DRAIN | GPIO_PULL_UP);
if (ret < 0) {
printk("Failed to configure pin\n");
}
printk("GPIO configured successfully.\n");
int val = gpio_pin_get(ow_gpio.port, ow_gpio.pin);
if (val < 0) {
printk("Erreur lecture GPIO\n");
} else {
printk("Valeur GPIO : %d\n", val);
} */
k_msleep(SLEEP_TIME_MS);
const struct device *dht = device_get_binding("DHT_SENSOR");
k_msleep(SLEEP_TIME_MS);
if (!dht) {
printk("DHT not found\n");
}k_msleep(SLEEP_TIME_MS);
if (!device_is_ready(dht)) {
printk("DHT device not ready\n");
}
struct sensor_value temp, humidity;
k_msleep(SLEEP_TIME_MS);
int ret = sensor_sample_fetch_chan(dht, SENSOR_CHAN_ALL);
if (ret < 0) {
printk("Failed to fetch sample: %d\n", ret);
}
k_msleep(SLEEP_TIME_MS);
ret = sensor_channel_get(dht, SENSOR_CHAN_AMBIENT_TEMP , &temp);
if (ret < 0) {
printk("Failed to get temperature: %d\n", ret);
}
ret = sensor_channel_get(dht, SENSOR_CHAN_AMBIENT_TEMP , &humidity);
if (ret < 0) {
printk("Failed to get humidity: %d\n", ret);
}
printk("Temp: %d.%06d °C\n", temp.val1, temp.val2);
printk("Humidity: %d.%06d %%\n", humidity.val1, humidity.val2);
//gpio_pin_configure(gpio_dev, ONE_WIRE_PIN, GPIO_INPUT | GPIO_PULL_UP);
while (1) {
printk("Hello World!\n");
k_msleep(SLEEP_TIME_MS);
}
}
And 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";
/* Specify the GPIO pin connection and enable the pull-up */
dio-gpios = <&gpio0 0 (GPIO_ACTIVE_LOW)>;
/* Enable the device */
status = "okay";
};
};
&arduino_adc {
io-channel-map = <0 &adc 0>, <1 &adc 1>, <2 &adc 2>, <3 &adc 3>, <4 &adc 4>, <5 &adc 5>;
compatible = "arduino,uno-adc";
};
With this code, the msg Failed to fetch sample : -5 display on the console.
Thank you for your help !
Best regards,
Jade Mouillot
