About MQTTool
This is an MQTT client and test tool. MQTT is a machine-to-machine (M2M) messaging protocol commonly used for IoT applications. For more information on MQTT visit http://mqtt.org MQTTool can connect to authenticated and...
This is an MQTT client and test tool. MQTT is a machine-to-machine (M2M) messaging protocol commonly used for IoT applications. For more information on MQTT visit http://mqtt.org MQTTool can connect to authenticated and unauthenticated MQTT brokers, subscribe to topics, and publish messages to topics. I built this tool as i was doing my own MQTT investigations and I've posted it hoping others would find it useful too. I continue to use it on projects, and I'm continuing to look to improve this tool. If there are changes that would make this more useful, please send me feedback. Thanks!
Version History MQTTool source has been released on GitHub. See https://github.com/bjpetit/MQTTool for more details. This update includes some minor layout fixes. 2.6 04/10/2019 Bug fixes and some minor UI cleanup. 2.5 10/22/2018 Fixes for a couple of bugs. 2.4.1 07/01/2018 Idle Sleep Delay - If your device is a bit too aggressive about going to sleep while you are trying to use this tool, this option is for you. A new toggle switch can be found under the MQTTool App Settings. If you enable this switch, the device will wait 5 minutes before automatically going to sleep. Note: This sleep delay will only be in effect while the MQTTool app is open, connected to a broker and subscribed to a topic. Otherwise the device's default sleep timer applies. Fixed an input validation bug in the connect tab 2.4 05/11/2018 This release fixes a few bugs. 2.3 03/29/2018 - Fixed issue which caused re-subscriptions after a automatic reconnect to fail, yet indicate that the subscription succeeded. - Updated the status field to show additional error status when errors occur. 2.2 03/05/2018 - Changes in Message Detail View - Message arrival timestamp added - Tap Topic text to change active subscription to specific topic - Improve app layout on smaller screens - Add support for iPhone X screen 2.1 02/20/2018 Enhancements * A History button is now available on the Connect, Subscribe and Publish Screens. Click on the clock icon to see recent settings for each screen. Fixes * The Mosquitto MQTT library has been updated to version 1.4.14. This update includes improvements to stability and security. * This release includes multiple stability and usability improvements 2.0 02/15/2018 Updates to improve support for latest iOS. 1.50 12/28/2017 Fixed bugs affecting users on the Connect and Stats pane. 1.21 02/27/2017 Stabilization and usability improvements 1.20 01/09/2017 This minor update addresses a crash that was occurring on connect for some users. 1.17 07/15/2016 Minor UI Cleanup Fix timing issue causing status updates to be missed 1.16 07/12/2016 Minor UI Cleanup 1.12.1 06/01/2016 Thanks for using MQTTool, and thanks for your input! You'll find changes in last few updates which were based on user feedback. The 1.12 update includes... * Support for configurable Client ID. * Stability and responsiveness improvements. 1.12 05/20/2016 Clean up text entry handling. - Removed auto submit with "Go" button. This eliminates inadvertent action when attempting to dismiss keyboard. - Better support for alternate keyboards. Add support for empty messages when Publishing. 1.10 05/16/2016 This update contains performance and stability improvements. 1.8 04/26/2016 The following changes are included with MQTTool 1.6. Fixes: - General performance and stability fixes - Fix for crash on Connect and Subscribe tabs - Fixed issue which caused retained messages to drop the retained flag Enhancements: - Last used settings will be preserved between sessions 1.6 04/01/2016 This version adds a number of enhancements and fixes. Connect - Clean sessions are selectable. Disable this option to enable a persistent session. Stats - Stats have been moved from the Connect tab into their own tab. Publish - Retain option is available for messages. Layout - Portrait and Landscape views supported for all devices. Fixes - Fix for periodic crash when dismissing keyboard on certain tabs. - General stability and performance improvements 1.4 03/20/2016 In addition to performance and stability updates, this version adds a number of new features. Connect - Connect and disconnect processing is more responsive - Message receive and publish stats are visible on the Connect page Subscribe - Message output is in a table format. Select a cell in the table to drill in to the message. - QOS is selectable Publish - QOS is selectable Fixes - General interface enhancement and fixes 1.2 03/09/2016 In addition to performance and stability updates, this version adds a number of new features. Layout Update - A tabbed layout has been added to separate the different functional areas within the tool. Login - Authenticated logins are now available. Subscribe - The subscription page is more responsive when displaying very active subscriptions - When subscribing to a topic, messages output can now include the message's topic Publish - Publish functionality is now available. Fixes - Automatic reconnect is more reliable - Automatic reconnect will also resubscribe to a topic if a subscription was active at the time of disconnect - Fixed a couple of crashes related to processing bad message and topic data 1.0 03/01/2016 0.8 02/25/2016
Previous Versions
Here you can find the changelog of MQTTool since it was posted on our website on 2021-12-17 10:31:34.
The latest version is 2.6 and it was updated on 2026-06-22 16:16:21. See below the changes in each version.
MQTTool version 2.6
Updated At: 2026-05-28
Changes: Version History MQTTool source has been released on GitHub.
See https://github.com/bjpetit/MQTTool for more details.
This update includes some minor layout fixes. 2.6 04/10/2019 Bug fixes and some minor UI cleanup. 2.5 10/22/2018 Fixes for a couple of bugs. 2.4.1 07/01/2018 Idle Sleep Delay
- If your device is a bit too aggressive about going to sleep while you are trying to use this tool, this option is for you. A new toggle switch can be found under the MQTTool App Settings. If you enable this switch, the device will wait 5 minutes before automatically going to sleep. Note: This sleep delay will only be in effect while the MQTTool app is open, connected to a broker and subscribed to a topic. Otherwise the device's default sleep timer applies.
Fixed an input validation bug in the connect tab 2.4 05/11/2018 This release fixes a few bugs. 2.3 03/29/2018 - Fixed issue which caused re-subscriptions after a automatic reconnect to fail, yet indicate that the subscription succeeded.
- Updated the status field to show additional error status when errors occur. 2.2 03/05/2018 - Changes in Message Detail View
- Message arrival timestamp added
- Tap Topic text to change active subscription to specific topic
- Improve app layout on smaller screens
- Add support for iPhone X screen 2.1 02/20/2018 Enhancements
* A History button is now available on the Connect, Subscribe and Publish Screens. Click on the clock icon to see recent settings for each screen.
Fixes
* The Mosquitto MQTT library has been updated to version 1.4.14. This update includes improvements to stability and security.
* This release includes multiple stability and usability improvements 2.0 02/15/2018 Updates to improve support for latest iOS. 1.50 12/28/2017 Fixed bugs affecting users on the Connect and Stats pane. 1.21 02/27/2017 Stabilization and usability improvements 1.20 01/09/2017 This minor update addresses a crash that was occurring on connect for some users. 1.17 07/15/2016 Minor UI Cleanup
Fix timing issue causing status updates to be missed 1.16 07/12/2016 Minor UI Cleanup 1.12.1 06/01/2016 Thanks for using MQTTool, and thanks for your input! You'll find changes in last few updates which were based on user feedback.
The 1.12 update includes...
* Support for configurable Client ID.
* Stability and responsiveness improvements. 1.12 05/20/2016 Clean up text entry handling.
- Removed auto submit with "Go" button. This eliminates inadvertent action when attempting to dismiss keyboard.
- Better support for alternate keyboards.
Add support for empty messages when Publishing. 1.10 05/16/2016 This update contains performance and stability improvements. 1.8 04/26/2016 The following changes are included with MQTTool 1.6.
Fixes:
- General performance and stability fixes
- Fix for crash on Connect and Subscribe tabs
- Fixed issue which caused retained messages to drop the retained flag
Enhancements:
- Last used settings will be preserved between sessions 1.6 04/01/2016 This version adds a number of enhancements and fixes.
Connect
- Clean sessions are selectable. Disable this option to enable a persistent session.
Stats
- Stats have been moved from the Connect tab into their own tab.
Publish
- Retain option is available for messages.
Layout
- Portrait and Landscape views supported for all devices.
Fixes
- Fix for periodic crash when dismissing keyboard on certain tabs.
- General stability and performance improvements 1.4 03/20/2016 In addition to performance and stability updates, this version adds a number of new features.
Connect
- Connect and disconnect processing is more responsive
- Message receive and publish stats are visible on the Connect page
Subscribe
- Message output is in a table format. Select a cell in the table to drill in to the message.
- QOS is selectable
Publish
- QOS is selectable
Fixes
- General interface enhancement and fixes 1.2 03/09/2016 In addition to performance and stability updates, this version adds a number of new features.
Layout Update
- A tabbed layout has been added to separate the different functional areas within the tool.
Login
- Authenticated logins are now available.
Subscribe
- The subscription page is more responsive when displaying very active subscriptions
- When subscribing to a topic, messages output can now include the message's topic
Publish
- Publish functionality is now available.
Fixes
- Automatic reconnect is more reliable
- Automatic reconnect will also resubscribe to a topic if a subscription was active at the time of disconnect
- Fixed a couple of crashes related to processing bad message and topic data 1.0 03/01/2016 0.8 02/25/2016
MQTTool version 2.6
Updated At: 2019-04-10
Changes: MQTTool source has been released on GitHub.
See https://github.com/bjpetit/MQTTool for more details.
This update includes some minor layout fixes.
MQTTool version 2.6
Updated At: 2019-04-10
Changes: Apr 10, 2019 Version 2.6
MQTTool source has been released on GitHub.
See https://github.com/bjpetit/MQTTool for more details.
This update includes some minor layout fixes.
Disclaimer
Official App Store Link
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