diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -1,5 +1,45 @@
 # Vulpes
+An ESP32-based radio orienteering controller.
 
-## Access Point
+## What
+Radio orienteering, or amateur radio direction finding (ARDF) is a 
+sport where people run around and look for hidden transmitters. One
+necessary component is a controller on each transmitter that tells
+it when and what to transmit. 
+
+This is my attempt at a simple, easy-to-use controller with a low 
+parts count. Rather than programming a microcontroller and/or 
+using DIP switches, time delays, and sync cables, the ESP32 development
+board lets you set up each controller using a web browser.
+
+[need links here for ARDF resources]
+
+## Hardware
+I designed a simple custom printed circuit board (PCB) to make
+assumbling this controller easy to do. The repo for schematic and
+board design is here: [link to new repo].
+
+Because the ESP32 doesn't track time when it is powered off, and
+I wanted to avoid specific delays (e.g., push a button two hours
+before an event starts), an additional real-time clock (RTC) is 
+included. The RTC runs on a watch battery to track time when the
+controller is not powered on.
+
+## Software/Firmware
+### General Settings
+
+### Cycle Settings
+
+### Network Settings
+#### Access Point
 When using as a wireless access point, the network SSID is "vulpes"
-with no password. Navigate to http://192.168.0.1 to access webform.
\ No newline at end of file
+with no password. Navigate to http://192.168.0.1 to access webform.
+
+## License
+GNU GPLv3. See `LICENSE` file for details, and 
+https://choosealicense.com/licenses/ if you're like me and don't
+understand all of this stuff.
+
+## Acknowledgments
+Special thanks to [Mark Fickett](http://www.markfickett.com/) for his
+[arduinomorse](https://github.com/markfickett/arduinomorse) library.
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