# Raspberry Pi UART **URL:** \ **Category:** General\ **Created:** [11 July 2019 17:20 UTC](https://discourse.nodered.org/t/raspberry-pi-uart/13185 "2019-07-11T17:20:28Z")\ **Posts on this page:** 4\ **Page:** 1

**Author:** ![georgethomas08](https://avatars.discourse-cdn.com/v4/letter/g/df788c/32.png) [@georgethomas08](https://discourse.nodered.org/u/georgethomas08)\ **Post date:** [11 July 2019 17:20 UTC](https://discourse.nodered.org/t/raspberry-pi-uart/13185/1 "2019-07-11T17:20:28Z")

Hi folks, I am new to Node RED and MQTT, I would like to know how to use Raspberry pi UART (ttyS0) in Node Red, I mean which block I have to use it. Help me please Kind Regards George ---

**Author:** ![dceejay](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/dceejay/32/38_2.png) [@dceejay](https://discourse.nodered.org/u/dceejay)\ **Post date:** [11 July 2019 17:43 UTC](https://discourse.nodered.org/t/raspberry-pi-uart/13185/2 "2019-07-11T17:43:45Z")

The serial port node is what you need though not sure if pi has ttyS0 by default. The built in one is ttyAMA0 if enabled I thonk ---

**Author:** ![georgethomas08](https://avatars.discourse-cdn.com/v4/letter/g/df788c/32.png) [@georgethomas08](https://discourse.nodered.org/u/georgethomas08)\ **Post date:** [11 July 2019 17:59 UTC](https://discourse.nodered.org/t/raspberry-pi-uart/13185/3 "2019-07-11T17:59:39Z")

Thanks for the support, I am using raspberry Pi 3 b+, in that ttyAMA0 is connected with Bluetooth BLE, so the gpio pins 14 and 15 is ttyS0. ---

**Author:** ![dceejay](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/dceejay/32/38_2.png) [@dceejay](https://discourse.nodered.org/u/dceejay)\ **Post date:** [11 July 2019 18:02 UTC](https://discourse.nodered.org/t/raspberry-pi-uart/13185/4 "2019-07-11T18:02:47Z")

Ah right. No probs.