# Does Calliope support retain flag on MQTT messages? **URL:** \ **Category:** LTE Cat 1 / Cat 1 bis (Calliope)\ **Created:** [October 17, 2025, 12:11am UTC](https://forum.sequans.com/t/does-calliope-support-retain-flag-on-mqtt-messages/232 "2025-10-17T00:11:17Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![David\_Ahmed](https://avatars.discourse-cdn.com/v4/letter/d/b77776/32.png) [@David\_Ahmed](https://forum.sequans.com/u/David_Ahmed)\ **Post date:** [October 17, 2025, 12:11am UTC](https://forum.sequans.com/t/does-calliope-support-retain-flag-on-mqtt-messages/232/1 "2025-10-17T00:11:17Z")
I have looked into all the MQTT AT commands but I couldn’t figure out how one would send an MQTT message with `retain` flag set to true. ---
**Author:** ![Xi\_liu](https://avatars.discourse-cdn.com/v4/letter/x/8e8cbc/32.png) [@Xi\_liu](https://forum.sequans.com/u/Xi_liu)\ **Post date:** [October 17, 2025, 7:44am UTC](https://forum.sequans.com/t/does-calliope-support-retain-flag-on-mqtt-messages/232/2 "2025-10-17T07:44:51Z")
Hello It is not supported in current release. It will be added in next official release. ---
**Author:** ![David\_Ahmed](https://avatars.discourse-cdn.com/v4/letter/d/b77776/32.png) [@David\_Ahmed](https://forum.sequans.com/u/David_Ahmed)\ **Post date:** [October 17, 2025, 12:39pm UTC](https://forum.sequans.com/t/does-calliope-support-retain-flag-on-mqtt-messages/232/3 "2025-10-17T12:39:22Z")
Thanks Xi\_liu; any idea when the next release is scheduled for? 🤔 ---
**Author:** ![Greg](https://dub1.discourse-cdn.com/flex018/user_avatar/forum.sequans.com/greg/32/7_2.png) [@Greg](https://forum.sequans.com/u/Greg)\ **Post date:** [October 17, 2025, 12:44pm UTC](https://forum.sequans.com/t/does-calliope-support-retain-flag-on-mqtt-messages/232/4 "2025-10-17T12:44:33Z")
The current target is mid-december, to have this maintenance release partially certified (PTCRB, GCF). The main MNO certifications will be done between mid-december and mid-January. ---
**Author:** ![David\_Ahmed](https://avatars.discourse-cdn.com/v4/letter/d/b77776/32.png) [@David\_Ahmed](https://forum.sequans.com/u/David_Ahmed)\ **Post date:** [December 19, 2025, 11:16am UTC](https://forum.sequans.com/t/does-calliope-support-retain-flag-on-mqtt-messages/232/5 "2025-12-19T11:16:46Z")
@Greg any updates? 🤓 // eagerly waiting ---
**Author:** ![Greg](https://dub1.discourse-cdn.com/flex018/user_avatar/forum.sequans.com/greg/32/7_2.png) [@Greg](https://forum.sequans.com/u/Greg)\ **Post date:** [December 19, 2025, 12:22pm UTC](https://forum.sequans.com/t/does-calliope-support-retain-flag-on-mqtt-messages/232/6 "2025-12-19T12:22:33Z")
Dear David, The current schedule is to have that updated SW release fully certified. in Q1. Official certification activity will start early January and it will take some time to complete PTCRB/GCF and major MNO certification updates. ---
**Author:** ![Xi\_liu](https://avatars.discourse-cdn.com/v4/letter/x/8e8cbc/32.png) [@Xi\_liu](https://forum.sequans.com/u/Xi_liu)\ **Post date:** [September 24, 2026, 6:54am UTC](https://forum.sequans.com/t/does-calliope-support-retain-flag-on-mqtt-messages/232/7 "2026-09-24T06:54:54Z")
Hello In case you are not aware. The new release support retain flag is available under [LR9.0.6.1](https://sequanscommunicationsfrance.sharepoint.com/:f:/r/sites/customers/customers%20root/Download/MassMarket/Calliope2%20GC02S1%20-%20Cat%201bis/Software/GC02S1-EU2-NA2/LR9.0.6.1?d=w89eecbbb46554daf948c0f6d0bf68fc3&csf=1&web=1&e=iIGgAz) And the AT command reference manual with updated MQTT AT commands is available under [Calliope2-ATCommandsReferenceManual-LR9.0-Rev.4.pdf](https://sequanscommunicationsfrance.sharepoint.com/:b:/r/sites/customers/customers%20root/Download/MassMarket/Calliope2%20GC02S1%20-%20Cat%201bis/Module/AT%20Commands/Calliope2-ATCommandsReferenceManual-LR9.0-Rev.4.pdf?d=w45641304a6874d928d87da45e1adba36&csf=1&web=1&e=ItQF1y)