Error 133 (0x85): GATT ERROR with custom service tutorial

[RO]

Hello,

I am new to the Nordic Environment. I am following the excellent tutorial to create a custom service and characteristic.

Everything worked fine until Step 6(Handling the Write event from soft device). 

However, after working on Step 7 & 8(Propagating Custom Service Events to Application and Notifying the Custom Value Characteristic), I get Error 133: GATT ERROR on the nRF Connect app (on a One Plus 5) when I try to connect to the advertised label. 

I have read the other posts related to this issue but can't my sense of them with respect to my case.  What could be the reason for sudden occurrence of this error?

Please help.

Thanks

[bjorn-spockeli]

Can you post the on_cus_evt function? And can you set a breakpoint in on_cus_evt and see if you enter it when you connect and call the event handler in the on_connect function?

[RO]

I set a breakpoint in on_cus_evt. It enters the on_write function in blle_cus.c but it does not enter the on_cus_evt function in main.c. I get an 'Unknown function at some address'.

Here is the code of on_cus_evt:

static void on_cus_evt(ble_cus_t     * p_cus_service,
                       ble_cus_evt_t * p_evt,
                       ble_evt_t const * p_ble_evt_main)
{
    
    switch(p_evt->evt_type)
    {
        
        case BLE_CUS_EVT_WRITE:

            printf("%s"," write to sd card ");
            break;
            
        case BLE_CUS_EVT_NOTIFICATION_ENABLED:
            break;

        case BLE_CUS_EVT_NOTIFICATION_DISABLED:
            break;
        
        
        case BLE_CUS_EVT_CONNECTED:
            break;

        case BLE_CUS_EVT_DISCONNECTED:
              break;

        default:
              // No implementation needed.
              break;
    }
}

[RO]

Yes I had added that line.

[bjorn-spockeli]

WHich address is it referring to? Could you check the .map file and see where on_cus_evt has been placed by the linker? 

[RO]

It's referring to 0x000008C8.

This is what I see in the .map file:

".text.on_cus_evt
0x000000000002bfa4 0x18 Output/ble_app_template_pca10040_s132 Release/Obj/main.o"

I have attached the .map file just in case for reference.

ble_app_template_pca10040_s132.map