How to Ensure Atomic Access to Queue in ESP32 FreeRTOS Project?
Hey guys so while i was developing an ESP32 IoT project using FreeRTOS, I'm encountering intermittent data corruption when two tasks share a queue for sensor data (readSensorTask: Reads temperature, humidity, and pressure data from sensors (BME280) every 1 second and the processDataTask: Processes the sensor data and sends it to a cloud server (MQTT)
every 10 seconds.) Despite using mutexes, I'm seeing the following error:
Error message:
I was trying to send sensor data to the queue using:
How can I ensure atomic access to the queue and prevent simultaneous writes?
every 10 seconds.) Despite using mutexes, I'm seeing the following error:
Guru Meditation Error: Core 0 panic'ed (LoadProhibited)Error message:
pc 0x400f36d6 ps 0x6000003f (crash log attached)I was trying to send sensor data to the queue using:
How can I ensure atomic access to the queue and prevent simultaneous writes?
Solution
try this approach
1. Check Mutex Usage: Ensure you're correctly locking and unlocking the mutex when accessing the queue.
2. Verify Queue Size: Make sure the queue is large enough for the data you're sending.
3. Check Return Values: Always check the return value of
4. Inspect Crash Log: Look at the crash log for details on where the error occurs.
These steps should help you manage queue access and prevent data corruption.
1. Check Mutex Usage: Ensure you're correctly locking and unlocking the mutex when accessing the queue.
2. Verify Queue Size: Make sure the queue is large enough for the data you're sending.
3. Check Return Values: Always check the return value of
xQueueSend4. Inspect Crash Log: Look at the crash log for details on where the error occurs.
These steps should help you manage queue access and prevent data corruption.
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