UART debug voltage

I have received my IoT2050, and I am getting a USB-UART cable in order to debug it. But I can not find any information whether it should be 3,3V or 5V? Does it matter?

https://ftdichip.com/products/c232hd-edhsp-0/ (5V)

https://ftdichip.com/products/c232hd-ddhsp-0/ (3.3V)

bergmanu

Hi, 

I am using a 3.3V cable, this works. 

Best regards!

 Thank You for the information!

What type of cable are you using?

I assume the connection should be RX-to-TX and RTS-to-CTS, so a cable with a single connector should work?

https://ftdichip.com/products/ttl-232r-3v3-we/

 Thank You!

bergmanu

Hi, 

I am using this one. 

The cable is connected like this: 

Using a single pin cable also works. It is enough to connect GND, TXD and RXD, so you don't need connect the VCC and the other pins. 

Best regards!