From 155889406bf49a1bd8653de39dc3711660306b54 Mon Sep 17 00:00:00 2001
From: arendst <mhtarends@gmail.com>
Date: Wed, 15 Feb 2017 11:09:22 +0100
Subject: [PATCH] add optoserial

---
 Tips.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Tips.md b/Tips.md
index b7611f58..732b5ca2 100644
--- a/Tips.md
+++ b/Tips.md
@@ -19,4 +19,7 @@ BTW changing TOPIC can be done online using the fallback topic and is only neede
 ### Debugging
 - For debugging purposes you can use the serial interface with command ```SerialLog 4``` and the Arduino IDE set to 115200 baud (19200 for Sonoff Dual) and both NL & CR or the web console with command ```WebLog 4```.
 
+- Debugging the Sonoff Pow is a bit tricky as the serial interface has a direct connection to one of the AC power lines. Therefore I designed below schematic which allows for serial monitoring and uploading of firmware while AC is connected.
+<img alt="Sonoff" src="https://github.com/arendst/arendst.github.io/blob/master/media/optoserial.jpg" height="500" /> 
+
 - To aid in finding the IP address of sonoff the network name will be ```<MQTT_TOPIC>-<last 4 decimal chars of MAC address>```. So the default name is ```sonoff-1234```. Another option is MQTT command ```Status 5```.