From a82c770dc905f3099269991fff5db8e669a2b07f Mon Sep 17 00:00:00 2001
From: gijsio <67470426+gijsio@users.noreply.github.com>
Date: Mon, 3 May 2021 15:27:23 +0200
Subject: [PATCH] Explain difference between exp 3.0 and 3.1

---
 content/datasheets/expansionboards/expansion3.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/content/datasheets/expansionboards/expansion3.md b/content/datasheets/expansionboards/expansion3.md
index c10b3be..dbd89d2 100644
--- a/content/datasheets/expansionboards/expansion3.md
+++ b/content/datasheets/expansionboards/expansion3.md
@@ -44,6 +44,7 @@ The Expansion Board features a single cell Li-Ion/Li-Po charger with a JST PHR
 
 ### Differences between v2.0 and v3.0
 
+On version 3.0:
 * The FTDI chip as been replaced with a custom programmed PIC, similar to the
 
   Pysense/Pytrack/Pyscan boards. This allows our firmware update tool to
@@ -56,6 +57,11 @@ The Expansion Board features a single cell Li-Ion/Li-Po charger with a JST PHR
 
   a Pycom module, the module will enter safe boot.
 
+### Differences between v3.0 and v3.1
+On version 3.1:
+* The green USB-LED is only lit when the USB communication stack is running
+* The USB-Serial converter (PIC) is powered using any power source. Previously, it would only power up when the board was powered through USB.
+
 ## Troubleshooting
 
 * If PIC stays in bootloader mode, the [`dfu-util` update](/updatefirmware/expansionboard/) should be performed