# Two instances of Node-Red communicating via TTN (MQTT)?
**URL:** https://discourse.nodered.org/t/two-instances-of-node-red-communicating-via-ttn-mqtt/74048
**Category:** General
**Tags:** mqtt
**Created:** [22 January 2023 10:39 UTC](https://discourse.nodered.org/t/two-instances-of-node-red-communicating-via-ttn-mqtt/74048 "2023-01-22T10:39:22Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@zeirix](https://discourse.nodered.org/u/zeirix)
#### Post date: [22 January 2023 10:39 UTC](https://discourse.nodered.org/t/two-instances-of-node-red-communicating-via-ttn-mqtt/74048/1 "2023-01-22T10:39:22Z")
Hello everybody,
I've some questions about using TTN as a message broker for Node-Red.
- Is it possible, that an instance of Node-Red is sending messages via TTN (MQTT, HTTP) to another instance of Node-Red, thus avoiding a direct connection (no need to set up an own MQTT broker, no need to open TCP/UDP ports)?
- Do I need a "real" hardware node, pushing messages over a radio (e.g. LoRa) network, with preconfigured EUIs to set up a device inside a TTN application?
- As far as I know, the node-red-contrib-ttn node isn't supported anymore, but i didn't find a successor for that. How do I have to configure the MQTT-node (topic, QoS,...) now?
Thanks a lot!
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### Author:  [@hominidae](https://discourse.nodered.org/u/hominidae)
#### Post date: [22 January 2023 11:51 UTC](https://discourse.nodered.org/t/two-instances-of-node-red-communicating-via-ttn-mqtt/74048/2 "2023-01-22T11:51:20Z")
...of course you can use a cloud based MQTT broker as intermediate to communicate between (many) NR instances.
I don't know TTN, but cloudMQTT and hivemq are the ones i am using.
Make sure that you use a poper authenticated and TLS/SSLbased connection.
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### Author:  [@zeirix](https://discourse.nodered.org/u/zeirix)
#### Post date: [22 January 2023 17:55 UTC](https://discourse.nodered.org/t/two-instances-of-node-red-communicating-via-ttn-mqtt/74048/3 "2023-01-22T17:55:56Z")
Hi hominidae,
I was thinking at least about HiveHQ, too, but at the moment I am using TTN for another application (with a LoRa device) and it offers a freemium plan.
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### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [23 March 2023 17:56 UTC](https://discourse.nodered.org/t/two-instances-of-node-red-communicating-via-ttn-mqtt/74048/4 "2023-03-23T17:56:12Z")
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