DevHeads IoT Integration Server•4mo ago

How Can I Consistently Handle Sensor Data Read Failures on AVR32UC with Zephyr OS?

hey guys does anyone have idea on how can I consistently handle sensor data read failures on the AVR32UC microcontroller and address the persistent issue of sensor data read failures using the Zephyr OS? I implemented an error handling code to manage and report sensor data read failures consistently. Despite this implementation, the persistent issue of sensor data read failure remains unresolved. How can this be effectively addressed? my code setup:

#include <zephyr.h>
#include <device.h>
#include <drivers/sensor.h>
#include <sys/printk.h>

const struct device *sensor_dev;

void main(void)
{
    struct sensor_value temp, humidity;

    sensor_dev = device_get_binding(DT_LABEL(DT_INST(0, ams_dht22)));
    if (!sensor_dev) {
        printk("Failed to bind DHT22 sensor\n");
        return;
    }

    while (1) {
        if (sensor_sample_fetch(sensor_dev) < 0) {
            printk("Failed to fetch data\n");
            k_sleep(K_SECONDS(5));
            continue;
        }
        sensor_channel_get(sensor_dev, SENSOR_CHAN_AMBIENT_TEMP, &temp);
        sensor_channel_get(sensor__dev, SENSOR_CHAN_HUMIDITY, &humidity);

        printk("Temperature: %d.%d C\n", temp.val1, temp.val2);
        printk("Humidity: %d.%d %%\n", humidity.val1, humidity.val2);

        k_sleep(K_SECONDS(10));
    }
}

#include <zephyr.h>
#include <device.h>
#include <drivers/sensor.h>
#include <sys/printk.h>

const struct device *sensor_dev;

void main(void)
{
    struct sensor_value temp, humidity;

    sensor_dev = device_get_binding(DT_LABEL(DT_INST(0, ams_dht22)));
    if (!sensor_dev) {
        printk("Failed to bind DHT22 sensor\n");
        return;
    }

    while (1) {
        if (sensor_sample_fetch(sensor_dev) < 0) {
            printk("Failed to fetch data\n");
            k_sleep(K_SECONDS(5));
            continue;
        }
        sensor_channel_get(sensor_dev, SENSOR_CHAN_AMBIENT_TEMP, &temp);
        sensor_channel_get(sensor__dev, SENSOR_CHAN_HUMIDITY, &humidity);

        printk("Temperature: %d.%d C\n", temp.val1, temp.val2);
        printk("Humidity: %d.%d %%\n", humidity.val1, humidity.val2);

        k_sleep(K_SECONDS(10));
    }
}

when this is successful, it is expected that the AVR32UC microcontroller should handle sensor data read failures consistently, retrying fetch attempts, and accurately reporting temperature and humidity data from the DHT22 sensor.

Solution:

To handle sensor data read failures more effectively on the AVR32UC microcontroller using Zephyr OS, you can refine your approach by implementing a more robust error-handling mechanism Like: Retry Mechanism Error Reporting Initialization Check...

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6 Replies

Marvee Amasi•4mo ago

@Dtynin you can classify your errors tho

Marvee Amasi•4mo ago

So that you can tailor the response to the specific issue. Let's say if it's a communication errors , it might require different retry strategies than timeout errors don't you think so?

Marvee Amasi•4mo ago

You can check this out

0err_class.cpp

Solution

Alien Queen•4mo ago

something like this

#include <zephyr.h>
#include <device.h>
#include <drivers/sensor.h>
#include <sys/printk.h>

const struct device *sensor_dev;

#define RETRY_COUNT 3
#define RETRY_DELAY K_SECONDS(2)
#define FETCH_INTERVAL K_SECONDS(10)

void main(void)
{
    struct sensor_value temp, humidity;
    int ret, retry;

    sensor_dev = device_get_binding(DT_LABEL(DT_INST(0, ams_dht22)));
    if (!sensor_dev) {
        printk("Failed to bind DHT22 sensor\n");
        return;
    }

    while (1) {
        retry = 0;
        while (retry < RETRY_COUNT) {
            ret = sensor_sample_fetch(sensor_dev);
            if (ret == 0) {
                break;
            }
            printk("Failed to fetch data, attempt %d/%d\n", retry + 1, RETRY_COUNT);
            retry++;
            k_sleep(RETRY_DELAY);
        }

        if (retry == RETRY_COUNT) {
            printk("Failed to fetch data after %d attempts\n", RETRY_COUNT);
            k_sleep(FETCH_INTERVAL);
            continue;
        }

        ret = sensor_channel_get(sensor_dev, SENSOR_CHAN_AMBIENT_TEMP, &temp);
        if (ret < 0) {
            printk("Failed to get temperature data\n");
            continue;
        }

        ret = sensor_channel_get(sensor_dev, SENSOR_CHAN_HUMIDITY, &humidity);
        if (ret < 0) {
            printk("Failed to get humidity data\n");
            continue;
        }

        printk("Temperature: %d.%d C\n", temp.val1, temp.val2);
        printk("Humidity: %d.%d %%\n", humidity.val1, humidity.val2);

        k_sleep(FETCH_INTERVAL);
    }
}

#include <zephyr.h>
#include <device.h>
#include <drivers/sensor.h>
#include <sys/printk.h>

const struct device *sensor_dev;

#define RETRY_COUNT 3
#define RETRY_DELAY K_SECONDS(2)
#define FETCH_INTERVAL K_SECONDS(10)

void main(void)
{
    struct sensor_value temp, humidity;
    int ret, retry;

    sensor_dev = device_get_binding(DT_LABEL(DT_INST(0, ams_dht22)));
    if (!sensor_dev) {
        printk("Failed to bind DHT22 sensor\n");
        return;
    }

    while (1) {
        retry = 0;
        while (retry < RETRY_COUNT) {
            ret = sensor_sample_fetch(sensor_dev);
            if (ret == 0) {
                break;
            }
            printk("Failed to fetch data, attempt %d/%d\n", retry + 1, RETRY_COUNT);
            retry++;
            k_sleep(RETRY_DELAY);
        }

        if (retry == RETRY_COUNT) {
            printk("Failed to fetch data after %d attempts\n", RETRY_COUNT);
            k_sleep(FETCH_INTERVAL);
            continue;
        }

        ret = sensor_channel_get(sensor_dev, SENSOR_CHAN_AMBIENT_TEMP, &temp);
        if (ret < 0) {
            printk("Failed to get temperature data\n");
            continue;
        }

        ret = sensor_channel_get(sensor_dev, SENSOR_CHAN_HUMIDITY, &humidity);
        if (ret < 0) {
            printk("Failed to get humidity data\n");
            continue;
        }

        printk("Temperature: %d.%d C\n", temp.val1, temp.val2);
        printk("Humidity: %d.%d %%\n", humidity.val1, humidity.val2);

        k_sleep(FETCH_INTERVAL);
    }
}

techielew•4mo ago

@Dtynin were you able to resolve this? See @Alien Queen code here

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How Can I Consistently Handle Sensor Data Read Failures on AVR32UC with Zephyr OS?