gruenst-
1Make PCB, solder components
PCB services: Aisler.net (https://aisler.net/p/LIMNJTWW), PCBway, etc.
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2flash bootloader
flash bootloader using .bin file, e.g. via JLink, see https://learn.adafruit.com/how-to-program-samd-bootloaders
Command line instructions: -> JLinkExe -> connect -> ATSAMD51G19A -> SWD -> default -> loadbin bootloader...bin,0 -> r
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3Add Circuitpython
mount device via usb, put into bootloader mode, upload circuitpython .uf2 file, upload circuitpython library bundle
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4Add GUI
upload .html file to device, adjust accordingly
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5Put into case
3d printed case: https://www.tinkercad.com/things/gIFCSjOI2CM
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6enjoy!
USB to LoRa interface
Mounts like an USB stick in order to send and receive radio messages over long distances using only your browser as an inteface
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