diff --git a/Variant-USART.md b/Variant-USART.md index 3c3bfe3..5d0a1c1 100644 --- a/Variant-USART.md +++ b/Variant-USART.md @@ -14,6 +14,7 @@ You can adjust USART2_BAUD or USART3_BAUD parameters if you need different baud * Connect blue wire to RX, green wire to TX and black wire to GND of Arduino on right sensor cable(shorter) * Only USART3(right sensor cable) is 5v tolerant +⚠️ On some boards, the black wire is 15v !!! Check with a multi-meter to make sure 15V and ground are not swapped
⚠️ Red wire from sensor cable delivers 15v !!! ## Usart configuration: