# Multiple Client Pis

**URL:** https://discourse.nodered.org/t/multiple-client-pis/36527
**Category:** Developing Nodes
**Created:** [25 November 2020 19:48 UTC](https://discourse.nodered.org/t/multiple-client-pis/36527 "2020-11-25T19:48:06Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![kshitiz](https://avatars.discourse-cdn.com/v4/letter/k/e95f7d/32.png) [@kshitiz](https://discourse.nodered.org/u/kshitiz)
#### Post date: [25 November 2020 19:48 UTC](https://discourse.nodered.org/t/multiple-client-pis/36527/1 "2020-11-25T19:48:06Z")

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Hello everyone, I am new to Node-Red so need some of your help. I am trying to send data to multiple client raspberry Pis via Router from dashboard(server) side of main server raspberry pi. I need some of your guidance here.

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### Author: ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)
#### Post date: [25 November 2020 20:14 UTC](https://discourse.nodered.org/t/multiple-client-pis/36527/2 "2020-11-25T20:14:07Z")

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> [@kshitiz](#):
>
> I am trying to send data to multiple client raspberry Pis

Use MQTT.

Client PI 1 - subscribe to MQTT topic `server/some/invented/topic`  
Client PI 2 - subscribe to MQTT topic `server/some/invented/topic`  
Client PI 3 - subscribe to MQTT topic `server/some/invented/topic`

SERVER PI - Publish value to MQTT topic `server/some/invented/topic`

This is the simplest way.

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### Author: ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)
#### Post date: [24 January 2021 20:14 UTC](https://discourse.nodered.org/t/multiple-client-pis/36527/3 "2021-01-24T20:14:10Z")

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