Want tbootloader to enter DFU mode for a few seconds each time device is reset

Question

Hello, 
 1- we are using button-less secure bootloader. 
 2- Have successfully download our application image to the target via nRF Connect mobile App. 
 3- When target is reset, our application loads and runs as expected. 
 4- Can also put the target in DFU mode, using our phone app and repeaet the process and update our application image. 
 
 Question1: 
 Is there a way for the bootloader to first boot into DFU mode each and every time target board is reset , wait for let's say ten seconds, and if no DFU process is initiated, to then run the application? 
 Question 2: 
 Is there a way to set the transmit power level for DFU process? 
 
 Thanks, 
 Mano

Amanda Hsieh · Answer

Hi Mano, 
 Is there a way for the bootloader to first boot into DFU mode each and every time target board is reset , wait for let's say ten seconds, and if no DFU process is initiated, to then run the application? 
 You can set NRF_BL_DFU_INACTIVITY_TIMEOUT_MS in the sdk_config.h. 
 
 Is there a way to set the transmit power level for DFU process? 
 The bootloader does not have the configuration for BLE TX power setting. See this answer . 
 -Amanda H.