From 7fa223faeddab01a97bf929ff684eac5db9a88e4 Mon Sep 17 00:00:00 2001
From: TQ Hirsch <thequux@thequux.com>
Date: Fri, 21 Dec 2018 20:56:51 +0100
Subject: [PATCH] Updated Sonoff 4CH and 4CH Pro (markdown)

---
 Sonoff-4CH-and-4CH-Pro.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Sonoff-4CH-and-4CH-Pro.md b/Sonoff-4CH-and-4CH-Pro.md
index c2826301..5cc0e95b 100644
--- a/Sonoff-4CH-and-4CH-Pro.md
+++ b/Sonoff-4CH-and-4CH-Pro.md
@@ -26,7 +26,7 @@ Compared to the 4CH the main differences/improvements of the 4CH Pro are:
 Please see the [Hardware Preparation](https://github.com/arendst/Sonoff-Tasmota/wiki/Hardware-Preparation) page for general instructions.
 
 As always, you need to access the serial interface. The **four serial pins** (3V3, Rx, Tx, GND) can be seen in the first picture.
-*Attention:* The printed labels on the PCB for Rx and Tx are incorrectly swapped as can be seen on the image.
+*Attention:* The printed labels on the PCB for Rx and Tx may be incorrectly swapped as can be seen on the image. A newer board revision has the Rx and Tx labels in the correct place; regardless of the labels, the pin next to 3V3 is Rx.
 
 <img title="Sonoff 4CH serial connection pins" src="https://github.com/arendst/arendst.github.io/blob/master/media/sonoff4ch_pins.jpg" width="48%" /> 
 <img title="Sonoff 4CH GPIO0" src="https://github.com/arendst/arendst.github.io/blob/master/media/sonoff4ch_gpio0.jpg" width="42%" align="right" />