# Cumulocity IoT Tips and Tricks - Using MQTTLens as client for Cumulocity

**URL:** https://community.cumulocity.com/t/cumulocity-iot-tips-and-tricks-using-mqttlens-as-client-for-cumulocity/5424
**Category:** Knowledge Base
**Tags:** cumulocity, device-connectivity
**Created:** [March 6, 2019, 2:32pm UTC](https://community.cumulocity.com/t/cumulocity-iot-tips-and-tricks-using-mqttlens-as-client-for-cumulocity/5424 "2019-03-06T14:32:08Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Michael\_Welsing](https://avatars.discourse-cdn.com/v4/letter/m/3e96dc/32.png) [@Michael\_Welsing](https://community.cumulocity.com/u/Michael_Welsing)
#### Post date: [March 6, 2019, 2:32pm UTC](https://community.cumulocity.com/t/cumulocity-iot-tips-and-tricks-using-mqttlens-as-client-for-cumulocity/5424/1 "2019-03-06T14:32:08Z")

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If you have problems connecting MQTTLens as client to Cumulocity, try using a shorter client ID. MQTTLens uses MQTT version 3.1 but incorrectly ignores the limit on client ID lengths in MQTT 3.1.&nbsp;

Alternatively, try changing to another MQTT client such as MQTTBox.