setForceDfu

Setting force DFU to true will prevent from jumping to the DFU Bootloader mode in case there is no DFU Version characteristic (Legacy DFU only!). Use it if the DFU operation can be handled by your device running in the application mode.

If the DFU Version characteristic exists, the information whether to begin DFU operation, or jump to bootloader, is taken from that characteristic's value. The value returned equal to 0x0100 (read as: minor=1, major=0, or version 0.1) means that the device is in the application mode and buttonless jump to DFU Bootloader is supported.

However, if there is no DFU Version characteristic, a device may support only Application update (version from SDK 4.3.0), may support Soft Device, Bootloader and Application update but without buttonless jump to bootloader (SDK 6.0.0) or with buttonless jump (SDK 6.1.0).

In the last case, the DFU Library determines whether the device is in application mode or in DFU Bootloader mode by counting number of services: if no DFU Service found - device is in app mode and does not support buttonless jump, if the DFU Service is the only service found (except General Access and General Attribute services) - it assumes it is in DFU Bootloader mode and may start DFU immediately, if there is at least one service except DFU Service - the device is in application mode and supports buttonless jump. In the last case, if you want to perform DFU operation without jumping - call the this method with parameter equal to true.

This method is ignored in Secure DFU.

Parameters

See also