# Getting "Connection Refused: not authorised" when trying to use MQTT

**URL:** <https://www.thethingsnetwork.org/forum/t/getting-connection-refused-not-authorised-when-trying-to-use-mqtt/9863>\
**Category:** Application Development\
**Created:** [October 3, 2017, 3:40pm UTC](https://www.thethingsnetwork.org/forum/t/getting-connection-refused-not-authorised-when-trying-to-use-mqtt/9863 "2017-10-03T15:40:07Z")\
**Posts on this page:** 1\
**Showing post:** 17

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**Author:** ![bl00dy](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/bl00dy/32/36752_2.png) [@bl00dy](https://www.thethingsnetwork.org/forum/u/bl00dy)\
**Post date:** [June 5, 2020, 8:22am UTC](https://www.thethingsnetwork.org/forum/t/getting-connection-refused-not-authorised-when-trying-to-use-mqtt/9863/17 "2020-06-05T08:22:58Z")

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Hello,

Yes. I use EUIS

Ed

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