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nrf51822 usb device

Yoobe

hello,

is there a way to have a usb stack/usb hid library for nrf51822? I wonder if it is possible to use rx/tx port as D-/D+ to have usb connection... or even use an external uart to usb chip like (CP2102) and programme usb device?

thanks

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  • 0

    Yes I saw this but I wanted a solution with usb hid class device and not uart.

    I think there no cheap usb hid class device solution.. I am testing with a attiny85 board that use arduino with usb keyboard library..

    The project: making a mechanical keyboard with BLE and USB port.

    The other solution I will try : teensy 3 board with BLE board usb hid with the teensy and a ble extention for wireless device but this is not perfect as power consumption in wireless mode (teensy is not low power enough)

  • 0 in reply to Yoobe

    Yes the main MCU could be any mbed platform or a teensy + NRF51 for ble but this will consume more power on battery I think. I wanted that nrf51822 is the main MCU for keyboard matrix, rtc, OLED lcd etc.. and add a attiny85 when the usb is connected and is off when on BLE mode. I will probably test the 2 solutions and see what is the best. Thanks

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  • 0 in reply to Yoobe

    Yes the main MCU could be any mbed platform or a teensy + NRF51 for ble but this will consume more power on battery I think. I wanted that nrf51822 is the main MCU for keyboard matrix, rtc, OLED lcd etc.. and add a attiny85 when the usb is connected and is off when on BLE mode. I will probably test the 2 solutions and see what is the best. Thanks

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