diff --git a/CHANGELOG.md b/CHANGELOG.md
index 046e446..b4e14b1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+TODO:
+
+
 v5
 --
 
@@ -8,6 +11,15 @@ mainly changed parts for being ordered and assembled in larger batch:
 - change spring terminal
 - reroute accordingly
 
+tests:
+- I ordered the prototype in yellow, and while generally I don't like this color, here it suits the RJ45 port and other
+ black connectors.
+- I feared the high screw terminal would be in the way of the cable to the spring terminals, but actually this is not an issue
+
+issues:
+
+- the ESP32-MINI-1U uses x.FL IPEX3/MHC3 antenna connector, instead of the classical u.FL MHC1 used by the ESP32-WROOM. IPEX3 pigtails are hard to find though. The ESP32-MINI-1U comes with a PCB antenna, which would avoid the issue, but it requires standard assembly, which the ESP32-MINI-1U does not.
+
 v4
 --
 
@@ -15,9 +27,21 @@ changes:
 
 - add WLED status LED visible when inside enclosure
 - change ESP32-WROOM to ESP32-MINI on front for automated assembly
-- change buck voltage regulator to LMR16030, limiting to 3A output, since the board can't dissipate the heat generted by 5A buck (even in highest efficiency)
+- change buck voltage regulator to LMR16030, limiting to 3A output, since the board can't dissipate the heat generated by 5A buck (even in highest efficiency)
 - now able to measure input voltage
 
+tests:
+
+I tested the DC to DC converter.
+I drew 2.9 A (the ESP used additional 0.1A) for 20 minutes.
+The board was not is a case, but there was no active (e.g. fan) cooling or heat sink.
+The diode (hottest part) reached 104 deg. C, but was stable at that point.
+Drawing over 3.0A caused the converter to switch off.
+This is a built-in over-current protection.
+It was a good decision to switch to a 3A regulator instead or 5A.
+Although the diode is huge, and I used the regulator in high efficiency mode, the board gets quite hot (but that's usable).
+I recommend limiting the LED power usage to 2.5A in WLED since the ESP can use 0.5A during WiFi communication.
+
 v3
 --
 
@@ -83,6 +107,11 @@ changes:
 - complete re-layout, more compact
 - add I²S and PDM MEMS microphone (I²S is present because I did not test PDM yet)
 
+issues:
+
+- RX and TX are swapped
+- DMX RX is connected to DMX TX through R7+R11. I wanted to both activated the LED, but did not think of the interconnection. Just remove R7 to light on TX activity, or R11 for RX activity.
+
 v1
 --