README.md in timex_datalink_caldav-1.1.2 vs README.md in timex_datalink_caldav-1.1.3

@@ -70,10 +70,10 @@
   - uri: https://icalendpoint.com/example.ics
 ```
 
 The device is a serial device that flashes an led when it receives data. On Linux, this is usually `/dev/tty*`. On macOS, this is usually `$(ls /dev/tty.usbmodem* | head -n 1)`. On Windows, this is usually `COM1`.
 
-If you want to use this, I highly recommend pairing it with the Raspberry Pi Pico and [this project](https://github.com/famiclone6502/DIY_Datalink_Adapter). It is the cheapest and easiest way to get a serial device that works with the Timex Datalink watch.
+If you want to use this, I highly recommend pairing it with the Raspberry Pi Pico and [this project](https://github.com/famiclone6502/DIY_Datalink_Adapter) or [this one](https://github.com/synthead/timex-datalink-arduino). It is the cheapest and easiest way to get a serial device that works with the Timex Datalink watch.
 
 ## Notes
 
 - This gem is not affiliated with Timex, nor is it affiliated with any CalDAV server. It is simply a tool that I wrote to sync my events from my CalDAV server to my Timex Datalink watch.
 
\ No newline at end of file