We 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 chip design (nRF24LU1+) or dual chip design with nRF51 wireless connectivity chip and USB connectivity chip (like the segger).
Custom USB Dongle should support:
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In-Field-Programming from PC for the wireless connectivity chip
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USB-HID-Transfer of sensor data to PC
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DFU OTA from PC for the sensor board nRF51 chip
Segger chip does not support #2. nRF24LU1+ does not support #3. FTDI USB chips do not support #1 and #3.
Any idea for a USB-Bridge Chip which supports all 3 requirements?