What is the correct way to update a custom BLE characteristic on STM32WB50CG?
I have a question about how to correctly update a value of characteristic of custom BLE service on STM32WB50CG. The project was set up with CubeMX following their official tutorial:
https://www.youtube.com/watch?v=i10X4Blr8ns.
My main application is running on M4 core. It uses multiple sensors and then does various statistics with data taken from them. BLE stack is running on M0+ core. I can see all the services & characteristics I defined in the app (BLE Toolbox from STM) on my Android phone. Now I am trying to figure out how to update characteristics from main application. I tried to call those functions bellow with predefined value in my main app, but read value of characteristic on my Android phone is always 0.
Result status of aci_gatt_update_char_value is "success" when Custom_STM_App_Update_Char is called.
Functions I tried to call in my main application on M4 core to update characteristics (with fixed value of 5 for testing purposes)
Custom_STM_App_Update_Char(CUSTOM_STM_CVOLTAGE, (uint8_t*)5);
Custom_STM_App_Update_Char(CUSTOM_STM_CCURRENT, (uint8_t*)5);Example of two update value functions for my characteristics
case CUSTOM_STM_CVOLTAGE:
result = aci_gatt_update_char_value(CustomContext.CustomVsHdle,
CustomContext.CustomCvoltageHdle,
0, /* charValOffset */
SizeCvoltage, /* charValueLen */
(uint8_t *) pPayload);
/* USER CODE BEGIN CUSTOM_STM_Service_1_Char_1*/
/* USER CODE END CUSTOM_STM_Service_1_Char_1*/
break;
case CUSTOM_STM_CCURRENT:
result = aci_gatt_update_char_value(CustomContext.CustomCsHdle,
CustomContext.CustomCcurrentHdle,
0, /* charValOffset */
SizeCcurrent, /* charValueLen */
(uint8_t *) pPayload);
/* USER CODE BEGIN CUSTOM_STM_Service_3_Char_1*/
/* USER CODE END CUSTOM_STM_Service_3_Char_1*/
break;