diff --git a/Variant-USART.md b/Variant-USART.md
index 4993763..bfaaf87 100644
--- a/Variant-USART.md
+++ b/Variant-USART.md
@@ -54,5 +54,6 @@ The least significant byte comes first (little endian).
 If the board is [beeping](https://github.com/EmanuelFeru/hoverboard-firmware-hack-FOC/wiki/Diagnostics)
 * Make sure the baud rate is 115200
 * Make sure you are using the sensor cable(left=USART2 or right=USART3) selected in config.h
+* Assuming RX or/and TX can be defective on your mainboard, 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 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 
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+* 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
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