# Connecting to UART

**URL:** <https://mangoh.discourse.group/t/connecting-to-uart/9367>\
**Category:** mangOH Yellow\
**Created:** [June 22, 2021, 2:45pm UTC](https://mangoh.discourse.group/t/connecting-to-uart/9367 "2021-06-22T14:45:56Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![petersvendsen](https://avatars.discourse-cdn.com/v4/letter/p/51bf81/32.png) [@petersvendsen](https://mangoh.discourse.group/u/petersvendsen)\
**Post date:** [June 22, 2021, 2:45pm UTC](https://mangoh.discourse.group/t/connecting-to-uart/9367/1 "2021-06-22T14:45:56Z")

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I have soldered a 1.8V FTDI cable to the IOT Expansion board of my Mango Yellow. I have connected the wires in this way:  
Pin 4: Ground  
Pin 12: RXD  
Pin 13: TXD  
Pin 14: CTS  
Pin 15: RTS

Then I followed this tutorial: [Octave Resource Protocol Guides](https://docs.octave.dev/v2.0/docs/octave-resource-protocol-guides). However, the demo code never gets a response from the board. It just keeps sending messages without getting a response.