chore: Update README

README.md

@@ -1 +1,27 @@
-# inky-calendar
+# inky-calendar
+This project is based around the [Inky Frame 7.3"][inky-frame] 7-color e-ink display.
+
+The main goal is to create a low power calendar, which is both able to indicate national holidays,
+as well as read a custom list of birthdays and other important dates from an sd-card.
+
+The wireless functionality will mainly be used to set the real time clock, in order to track the current date,
+and to automatically redraw the screen at the start of every day. This means that the wireless connection will only be used as needed, to minimize the battery drain.
+
+# Installing
+You can find the `inky_calendar.uf2` binary in the [Releases page][releases]. Boot your inkyframe in usb mode by holding `bootsel` while plugging in, then copy the binary onto the mounted drive.
+
+# Building
+
+The build requiremnts for this project are
+* CMake
+* gcc-arm-none-eabi
+* [Pico SDK][pico-sdk]
+* [Pimoroni Pico libraries][pimoroni-pico]
+
+The environment variable `PICO_SDK_PATH` is used to indicate where you have downloaded the Pico SDK to.
+IF the Pimoroni Pico library shares the same parent folder as the Pico SDK, it will automatically be found, otherwise add the following define to cmake `-DPIMORONI_PICO_PATH=$PIMORONI_PICO_PATH`
+
+[inky-frame]: https://shop.pimoroni.com/products/inky-frame-7-3
+[pico-sdk]: https://github.com/raspberrypi/pico-sdk
+[pimoroni-pico]: https://github.com/pimoroni/pimoroni-pico
+[releases]: https://github.com/Hexagenic/inky-calendar/releases