How to upload to device with DFU legacy modehttps://devzone.nordicsemi.com/f/nordic-q-a/42771/how-to-upload-to-device-with-dfu-legacy-modeHi, I have a smartwatch that has a nrf52832 chip inside. It firmware runs on S132 SoftDevice ver 2.0.1 and has an OTA bootloader which supposingly allows me to upload firmware via the Nordic upload tool. I am unfamilar with OTA and how to go abouten-USTelligent Community 13Wed, 23 Jan 2019 14:50:18 GMTRE: How to upload to device with DFU legacy modehttps://devzone.nordicsemi.com/thread/167423?ContentTypeID=1Wed, 23 Jan 2019 14:50:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4d513f97-6b44-4221-9d31-90f967bb7d52kian79<p>Thanks bjorn-spockeli.&nbsp;</p><div style="clear:both;"></div>RE: How to upload to device with DFU legacy modehttps://devzone.nordicsemi.com/thread/167178?ContentTypeID=1Tue, 22 Jan 2019 16:20:13 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d94e9a67-f934-41cb-b76d-bae4d4412601bjorn-spockeli<p>Hi Kian,&nbsp;</p> <p>Q1: The S132 v2.0.1 SoftDevice is compatible with SDK v11.0.0 , see&nbsp;<a href="https://www.nordicsemi.com/DocLib/Content/Comp_Matrix/nRF52832/latest/COMP/nrf52832/ic_rev_sdk_sd_comp_matrix">IC revisions, SDK, and SoftDevice compatibility matrix</a>. Updating from the Legacy bootloader in SDK v11 to the Secure Bootloader v15.0.0 is not a trivial task and you might risk bricking the device, i.e. you would need to reprogram it with a cable interface. I do not recommend attempting this.&nbsp;</p> <p>Q2: nRF Connect for Desktop does not support the legacy DFU Service.&nbsp;</p> <p>Q3: nRF Connect for Mobile does support the legacy DFU Service, but the firmware image must be generated with nRFutil v0.5.2 in order to be compatible, see&nbsp;<a href="https://github.com/NordicSemiconductor/pc-nrfutil">https://github.com/NordicSemiconductor/pc-nrfutil</a>.</p><div style="clear:both;"></div>