diff --git a/Variant-USART.md b/Variant-USART.md
index 20eb6d6..72d64ee 100644
--- a/Variant-USART.md
+++ b/Variant-USART.md
@@ -71,4 +71,5 @@ If the board is [beeping](https://github.com/EmanuelFeru/hoverboard-firmware-hac
 * Assuming RX or/and TX can be defective on your mainboard(port is defective on the MCU, 101 smd resistor is missing or has too high resistance), you can switch to other sensor cable in config.h 
 * On some boards the wire colors might differ, try switching blue and green wires
 * Your Arduino TX/RX might not be working, you can verify that by trying with and FTDI and the Web tool to confirm the mainboard/firmware is not the issue
-* You might have to reduce the baud rate if you use software serial on the Arduino
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+* You might have to reduce the baud rate if you use software serial on the Arduino
+* If you have added capacitors for PWM/PPM, remove it
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