Problem with DFU bootloader SDK 11: when discover services in bootloader mode device resets

[Sonr09]

Hello!

I have problem with DFU bootloader on nRF51822-xxAA.

For first, I made all steps for upload bootloader(erase chip, upload SD s130, upload bootloader). I used example dual_bank_ble_s130 with small changes for my custom board (My board haven't buttons).

Next, I uploaded over the air hex file dfu_test_app_hrm_s130_w_dfu.hex, from exampls too. All work nice. I can see device "Nordic_HRM" in MCP and can start DFU process.

And finally, I made my application with DFU BLE Service. Upload this app via MCP. Application work fine, in MCP i see DFU characteristics and can start DFU procces, BUT in bootloader after reconnect device is reset.

Additionaly, In MCP I can enable DFU Control Point notification, Write 0x0001 to DFU Control Point, next bootloader starts, connection lost. After that I click connect in MCP and connect to bootloader. And here is the problem, I click to discover services and device is reset and application starts. When I decover services in bootloared without any uploaded application and with dfu_test_app_hrm_s130_w_dfu.hex all work fine.

Help solve the problem.

[Sonr09]

WTD - no. I use SPI, app timers. Yes, I have try use other examples application. And all app examples are work and bootloader works fine too

[Sonr09]

I guess I find the problem. I had miss code string ble_enable_params.gatts_enable_params.service_changed = 1; When add DFU to my app. Now all works fine, but I don't understand why It works now. Go to read SDK description.

[Hung Bui]

If you don't set to enable service changed, the characteristic will not be available. And if in your application you decide to send a service changed indication, you will get an error.