Navio 2 UART pins logic voltage

[liudmila.slepova]

Hi @joego2124,

Welcome to our forum!

The logic levels on UART RX/TX are 3.3 V. I’ve found the old topic that might be of interest for you as well:

Navio+ UART TX RX logic voltage

I was wondering if anyone can help me with my question on the logic level voltage of the TX and RX UART breakout on the Navio+. I see a 5v power supply pin but is the TX and RX level shifited 5V or is it 3.3v. I ask as I have a UartSBee from SeeedStudio and I can select the logic voltage on it but if its 3.3V RX and TX I need to find a way to supply it with 3.3V, plus I don’t want to fry it. Thank you in advance for your help.