From 0a32fcbd2f2bde15dc152c3a7603c4069e59df3d Mon Sep 17 00:00:00 2001
From: andrewsuperlegit <47898478+andrewsuperlegit@users.noreply.github.com>
Date: Fri, 27 Sep 2024 14:18:22 -0500
Subject: [PATCH] Adds note about common error message received when trying to
 flash to arduino uno r4's

---
 content/docs/reference/microcontrollers/arduino.md | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/content/docs/reference/microcontrollers/arduino.md b/content/docs/reference/microcontrollers/arduino.md
index 8daf72fe..8c42ea1b 100644
--- a/content/docs/reference/microcontrollers/arduino.md
+++ b/content/docs/reference/microcontrollers/arduino.md
@@ -58,6 +58,17 @@ The Arduino Uno needs a few extra dependencies to work, for example, if you get
 
 To fix this, see the installation guide for [Linux](../../../../getting-started/install/linux/#avr-eg-arduino-uno-2) and for [macOS](../../../../getting-started/install/macos/#avr-eg-arduino-uno-2).
 
+### Arduino Uno R4 Support
+Currently Arduino Uno R4's are not yet supported. See [this PR](https://github.com/tinygo-org/tinygo/pull/4265) for more details.
+If you're receiving error messages like this 
+```
+Error: programmer is not responding
+Warning: attempt 1 of 10: not in sync: resp=0x00
+```
+when attempting to run 
+```tinygo flash -target=arduino -port=COM5```
+this is likely the cause.
+
 ## Flashing
 
 ### AVRDude