From d541a40f2810d060d6d5c1e9e99744b62d8aeb92 Mon Sep 17 00:00:00 2001
From: Kevin Hester <kevinh@geeksville.com>
Date: Wed, 16 Dec 2020 12:20:10 +0800
Subject: [PATCH] add note about permissions

---
 README.md | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/README.md b/README.md
index 7aa8e20..9f676a0 100644
--- a/README.md
+++ b/README.md
@@ -47,6 +47,17 @@ Or to configure an ESP32 to run as a Wifi access point:
 meshtastic --set wifi_ap_mode true --setstr wifi_ssid mywifissid --setstr wifi_password mywifipsw
 ```
 
+## FAQ/common problems
+
+This is a collection of common questions and answers from our friendly forum.
+
+### [Permission denied: ‘/dev/ttyUSB0’](https://meshtastic.discourse.group/t/question-on-permission-denied-dev-ttyusb0/590/3?u=geeksville)
+
+This indicates an OS permission problem for access by your user to the USB serial port.  Typically this is fixed by the following.
+```
+sudo usermod -a -G dialout <username>
+```
+
 ## Required device software version
 
 This API and tool both require that the device is running Meshtastic 0.6.0 or later.