Custom USB Dongle with In-Field-Programming, USB-HID, DFU OTAhttps://devzone.nordicsemi.com/f/nordic-q-a/4669/custom-usb-dongle-with-in-field-programming-usb-hid-dfu-otaWe want to design our own custom USB Dongle for connecting our sensor board to a PC. Sensor board has a nRF51 chip using Gazell protocol to transmit sensor data and also softdevice S110 with bootloader for DFU OTA. Custom Dongle could be a single chipen-USTelligent Community 13Thu, 25 Dec 2014 13:43:04 GMTRE: Custom USB Dongle with In-Field-Programming, USB-HID, DFU OTAhttps://devzone.nordicsemi.com/thread/16564?ContentTypeID=1Thu, 25 Dec 2014 13:43:04 GMT137ad170-7792-4731-bb38-c0d22fbe4515:cfd3ee41-4292-4c40-9fb2-10e4ffb8c362David Edwin<p>I do agree that the nRF24LU1 seems to be the more appropriate solution as all 3 seem to be implementable on the nRF24LU1. The nRF24LU1 ships from the factory with a built-in bootloader, you can look at <a href="http://www.nordicsemi.com/eng/nordic/download_resource/10418/2/58982192">nAN-18</a> for wireless firmware update between the nRF24LE1 and nRF24LU1.</p><div style="clear:both;"></div>RE: Custom USB Dongle with In-Field-Programming, USB-HID, DFU OTAhttps://devzone.nordicsemi.com/thread/16563?ContentTypeID=1Thu, 25 Dec 2014 09:38:44 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b0227110-4f49-47c2-b58e-58b0d65d42f3Baruch<p>I believe that the nRF24LU1+ is all you need, you can have a bootloader on it to be able to upgrade it in the field through USB. You&#39;ll also need a bootloader on the nRF51 to allow for OTA upgrade and the USB HID transfer will work for you too, you will need to write your own firmware for the nRF24LU1+ to do it but it shouldn&#39;t be too hard.</p> <p>Though I have to admit I didn&#39;t try that myself yet.</p><div style="clear:both;"></div>