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Accessing the Qualcomm Modem over USB on the RAK5010
I have recently been working with the RAKwireless RAK5010 development board. It includes the popular Nordic nRF52840 MCU for running applications on its Cortex-M4 CPU that can leverage the integrated 2.4 GHz multiprotocol support, as well as the LTE and GNSS support offered by the on-board Quectel BG95-M3 module. The micro-USB port on the board is connected to USB on the nRF52840, which allows for viewing serial output, but is not a mechanism for flashing new firmware.
The micro-USB port on the board is connected to USB on the nRF52840, which allows for viewing serial output, but is not a mechanism for flashing new firmware. My coworker Mike Szczys wrote about how to program the RAK5010’s nRF52840 using a Segger J-Link debug probe over on the Golioth blog. Fortunately a zero ohm resistor can easily be replaced with a bodge wire or a simple solder bridge.
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