nrf52840 dongle with DHT11 Sensor

[Navya]

Hello sir/ma'am,

I am facing this problem while interfacing with nrf52840 dongle dht11 sensor

Which custom id should I write here in screenshot2 and how to debug the DFU error?

Please help me with this.

[Hung Bui]

Hi Navya, 
Please be aware that the dongle is not made as a development board. It's a hardware tool to be used with nRF Connect and nRF Sniffer. 

I would suggest to continue your development on a nRF52 DK instead of the dongle. 

If you want to use the dongle, please try to test DFU with simple example, for example the blinky MBR example. After you have the blinky example working, you can start testing with the BLE application, please flash the softdevice before you flash the application and select the correct softdevice for the application.