From 4f1d9d102931cf99704c2e6849e17bebac684176 Mon Sep 17 00:00:00 2001
From: Edward Shen <code@eddie.sh>
Date: Sun, 26 Jan 2020 00:42:26 -0500
Subject: [PATCH] add instructions for perms

---
 README.md | 22 ++++++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 77bc26a..a113dad 100644
--- a/README.md
+++ b/README.md
@@ -1,8 +1,26 @@
-# Onyx Keyboard Firmware #
+# Onyx Keyboard Firmware
 
 This section intentionally left blank
 
-## Setup ##
+## Setup
+
+If you're running Linux, make sure you are part of the group for the character
+device that the board is connected to.
+
+For example, the device in bootloader mode appears as `/dev/ttyACM0`:
+
+```bash
+crw-rw---- 1 root uucp 166, 0 Jan 26 00:40 /dev/ttyACM0
+```
+
+You will need to add yourself to the group if you aren't part of it already, and
+log back in:
+
+```bash
+sudo usermod -a -G uucp $(whoami)
+```
+
+Then, follow the rest below:
 
 ```bash
 # Install toolchains