# Q&A: How to connect the IBS-M2 to a sub-device (sensor)

**URL:** <https://community.inkbird.com/t/q-a-how-to-connect-the-ibs-m2-to-a-sub-device-sensor/56800>\
**Category:** Questions & Answers\
**Tags:** smart-sensors\
**Created:** [June 5, 2023, 9:59am UTC](https://community.inkbird.com/t/q-a-how-to-connect-the-ibs-m2-to-a-sub-device-sensor/56800 "2023-06-05T09:59:50Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Tania](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.inkbird.com/tania/32/88_2.png) [@Tania](https://community.inkbird.com/u/Tania)\
**Post date:** [June 5, 2023, 9:59am UTC](https://community.inkbird.com/t/q-a-how-to-connect-the-ibs-m2-to-a-sub-device-sensor/56800/1 "2023-06-05T09:59:50Z")

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The IBS-M2 supports the following sub-device models: IBS-TH1 Mini, IBS-TH1, IBS-TH1 PLUS, IBS-TH2, IBS-TH2 PLUS, IBS-P01B, ITH-20R-O, IBS-P01R-O, IRS-WD1, ITH-12S, IBS-P02R-O  
Unlike the IBS-M1, it needs to be added manually when pairing the sub-device for the first time.  
Please connect the IBS-M2 to the INKBIRD app first.  
Then, please add the sub-device via the INKBIRD app homepage → IBS-M2 settings → ‘+’ in the top right corner.  
When the sub-device is within the search range of the IBS-M2, it will appear as a connectable device.  
 ![image](https://canada1.discourse-cdn.com/flex031/uploads/inkbird1/original/2X/5/51255bb09a30d57cc6378170709b973d3a50cde0.png)

 ![image](https://canada1.discourse-cdn.com/flex031/uploads/inkbird1/original/2X/7/7470bedec92cba6f46c939aedb3dd206ef02bb1f.png)

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**Author:** ![stelio](https://avatars.discourse-cdn.com/v4/letter/s/4bbf92/32.png) [@stelio](https://community.inkbird.com/u/stelio)\
**Post date:** [June 17, 2023, 12:24pm UTC](https://community.inkbird.com/t/q-a-how-to-connect-the-ibs-m2-to-a-sub-device-sensor/56800/2 "2023-06-17T12:24:53Z")

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Hi,  
when I try to connect an IPS-P02r sensor to the IBS-M2 as described above with my iphone, I receive “System error,operation failed” message.  
Any idea I can solve the problem ?  
Thanks for support.

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**Author:** ![Tania](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.inkbird.com/tania/32/88_2.png) [@Tania](https://community.inkbird.com/u/Tania)\
**Post date:** [June 19, 2023, 2:13am UTC](https://community.inkbird.com/t/q-a-how-to-connect-the-ibs-m2-to-a-sub-device-sensor/56800/3 "2023-06-19T02:13:17Z")

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Hello,  
Please check that the IBS-M2 remains connected to the network? Does its reading change in the app?  
If you re-login to the INKBIRD APP and put the IBS-P01R-O transmitter next to the IBS-M2 for pairing, will it also show an error?  
If yes, please email [support@inkbird.com](mailto:support@inkbird.com) with the phone model and video of this problem.  
Thanks.

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**Author:** ![jurajt](https://avatars.discourse-cdn.com/v4/letter/j/fbc32d/32.png) [@jurajt](https://community.inkbird.com/u/jurajt)\
**Post date:** [May 30, 2024, 4:59pm UTC](https://community.inkbird.com/t/q-a-how-to-connect-the-ibs-m2-to-a-sub-device-sensor/56800/4 "2024-05-30T16:59:40Z")

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Hi, is it possible to connect Inkbird IBS-P03R to M2? It is not listed in the desription post. Thanks.

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**Author:** ![Tania](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.inkbird.com/tania/32/88_2.png) [@Tania](https://community.inkbird.com/u/Tania)\
**Post date:** [May 31, 2024, 1:57am UTC](https://community.inkbird.com/t/q-a-how-to-connect-the-ibs-m2-to-a-sub-device-sensor/56800/5 "2024-05-31T01:57:37Z")

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Sorry IBS-P03R is not compatible with IBS-M2.  
A gateway compatible with IBS-P03R is still under development.