DA14531 central disconnect issue

Question

Hello Sir, 
 I am working with two DA14531 Tiny modules : one acting as a central and the other as a multi-com peripheral . After making changes as per the README file to support connecting to 3 devices, both modules initially connect. However, after 2-4 seconds, the central module automatically disconnects, and I receive the following error in the UART log: user_on_disconnect: reason: 08 (SMP_ERROR_CMD_NOT_SUPPORTED) .

OV_Renesas · Accepted Answer

Hi Amar, Thank you for the reply. The errors you are facing are: ///Request not allowed in current state.
 GAP_ERR_COMMAND_DISALLOWED = 0x43,

 ///Requested operation timeout.
 GAP_ERR_TIMEOUT = 0x45, Could you please share the Full Service Discovery information? What is the Characteristics Attribute permissions? Do you have Security implemented? Could you please share the API you used to perform the GATTC_WRITE? Best Regards, OV_Renesas

OV_Renesas · Answer

Hi Amar, Thank you for the reply. Regarding the Full Service Discovery: I was referring on the Logs you have received on your terminal. On your send_data_to_peripheral function you are using the 0x002C Characteristic handler. I would like to see the Service and Characteristic permissions for this specific handler. I would also remove the arch_asm_delay_us API. Adding extra delays while you have a BLE connection established can lead to BLE mistimings and that would result in the BLE connection being terminated. Best Regards, OV_Renesas

OV_Renesas · Answer

Hi Amar, The error you are facing is related to the Security configurations. My guess would be that you have enabled Security on the Peripheral side and that Central cannot access the Services without having a secure connection. Please check the Security configurations in order to make sure that both devices have either enabled or disabled security at the same time. Please refer here: DA1453x Tutorial BLE Security &mdash; DA1453x&DA1458x Tutorial BLE security (renesas.com) Best Regards, OV_Renesas

OV_Renesas · Answer

Hi Amar, Thank you for the reply. Please refer on the following: (1) DA14531mod central request data - Bluetooth Low Energy - Wireless Connectivity - Renesas Engineering Community On this thread I had explained the Central related APis on how to Read/Write on the Peripheral characteristics. (1) DA14531 Central With Security Read Characteristic - Bluetooth Low Energy - Wireless Connectivity - Renesas Engineering Community Please share more information regarding the Application Scenario and what is the expected the behavior of your application so we can actually guide you. Best Regards, OV_Renesas

DA14531 central disconnect issue

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