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### Upload code with Bumpy
For Programming perpose, you can use [**Bumpy**](https://www.tindie.com/products/electronutlabs/bumpy-blackmagic-probe-compatible-swd-debugger/) (blackmagic probe compatible SWD debugger)
For Programming perpose, you can use [**Bumpy**](https://electronut.in/product/bumpy/) (blackmagic probe compatible SWD debugger). You can buy bumpy from [here](https://www.tindie.com/products/electronutlabs/bumpy-blackmagic-probe-compatible-swd-debugger/).
Connect Bumpy with Papyr:
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For e-paper, [GxEPD2](https://github.com/ZinggJM/GxEPD2) and [Adafruit-GFX](https://github.com/adafruit/Adafruit-GFX-Library) libraries are used, so make sure to install these before compiling the code.
Here is the [video](https://www.youtube.com/watch?v=DwGDVKqDN-I) of arduino code running on Papyr.
<iframe width="560" height="315" src="https://www.youtube.com/embed/DwGDVKqDN-I" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
### Pin mapping
Pin mumbers are directly connected to the nRF52840 port/pin numbers. Pin numbers 0-31 are on the chip's Port0. Pin numbers above 32 are on Port1. For example, pin 16 corresponds to Port0, pin 16; pin 40 correseponds to Port1 pin 8 (i.e. 40-32).
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