Hello,
for your use case, I think BLE_HeartRate example would be a good reference project.
In this example there is a sensor measurement simulation. If you open hrs_app.c file, you can see there HRSAPP_Init() function. The first function registers the measurement task in the sequencer.
(You can find more information about sequencer here Utility:Sequencer - stm32mcu) It's a basically scheduler for tasks. Once the task is registered in the sequencer, it can be run from sequencer. The function HRSAPP_Measurement() is getting value from sensor (in this case reading from RTC) and then it
UTIL_SEQ_RegTask( 1<< CFG_TASK_MEAS_REQ_ID, UTIL_SEQ_RFU, HRSAPP_Measurement );
updates the characteristic value with this function below.
HRS_UpdateChar(HEART_RATE_MEASURMENT_UUID, (uint8_t *)&HRSAPP_Context.MeasurementvalueChar);
Now when you have the function for measuring the values and writing into the characteristic, it can be called periodically with timerservers. The code below creates a timer which is triggered periodically, and it runs the measurement.
HW_TS_Create(CFG_TIM_PROC_ID_ISR, &(HRSAPP_Context.TimerMeasurement_Id), hw_ts_Repeated, HrMeas);
You can start the timer to run periodically with HRSAPP_MEASUREMENT_INTERVAL with this function below.
HW_TS_Start(HRSAPP_Context.TimerMeasureHRSAPP_MEASUREMENT_INTERVALment_Id, HRSAPP_MEASUREMENT_INTERVAL);
I strongly recommend having a look at the links below to better understand.
How to build wireless applications with STM32WB MCUs - Application note
STM32WB Getting Started Series - YouTube
If you need to explain any step, please don't hesitate to ask.
Best regards,
Filip Kremen
