How to properly add a task to LoRaWAN_End_Node

[HNguy.25]

Hello everyone,

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Situation: Currently, I am trying to intergrate BME688 to the board Nucleo-WL55JC1. To be specific, on the board, I downloaded and ran the LoRaWAN_End_Node example. Then, instead of obtaining temperature/humidity/pressure from a function from the example (I assumed the original data obtaining function is EnvSensors_Read(&sensor_data) in lora_app.c), I want to use the sensor BME688 to give me those measurement.

What I did: I initialized the BME688 sensor as well as set up some constrains for it after the MX_LoRaWAN_Init(). Then I set the BME688 data obtaining process as a function and register it as a task. The task has an equal priority as the SendTxData() function.

Result: the program stopped right at the first measurement.

Question:

1. Was my procedure of intergrating BME688 into LoRaWAN_End_Node example correct or I missed something else? I assume the fault was when I set the BME688 data obtaining process with an equal priority as SendTxData()?
2. If I was wrong at that part, what else should I consider when adding BME688?

P/s: this post related to this post (https://community.st.com/s/feed/0D53W00001n9fiGSAQ).

I attached main.c and lora_app.c below. 

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I hope to have your opinions on this question.

Thank you, Huy Nguyen.

[Bruno_ST]

Hello @Community member​ 

In my opinion, if you want to create a new task, add a new entry under CFG_SEQ_Task_Id_t with a new name in Inc/utility_def.h.

If you just need to retreive data from you sensor, then you may just need to call RetrieveBMEData() under SendTxData(), no ?

If you want only that code to be called at regular interval, you can use UTIL_TIMER_Create()

BR,

Bruno

[HNguy.25]

Sorry for replying late. Your second suggestion helped me to finish the task.

Thank you very much, Huy Nguyen.