# IBS-TH1 Plus is not seen by IBS-M2 so cannot connect **URL:** \ **Category:** Questions & Answers\ **Created:** [May 14, 2025, 8:02pm UTC](https://community.inkbird.com/t/ibs-th1-plus-is-not-seen-by-ibs-m2-so-cannot-connect/166713 "2025-05-14T20:02:05Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![User\_1701638917747](https://avatars.discourse-cdn.com/v4/letter/u/9de053/32.png) [@User\_1701638917747](https://community.inkbird.com/u/User_1701638917747)\ **Post date:** [May 14, 2025, 8:02pm UTC](https://community.inkbird.com/t/ibs-th1-plus-is-not-seen-by-ibs-m2-so-cannot-connect/166713/1 "2025-05-14T20:02:05Z")
I have three IBS-TH1 Plus (v1.5) sensors and none of them appear when using the app to add them as external sensors to the IBS-M2 (MM v2.1.8 &MCU v1.0.0). It just searches for 60 secs and nothing shows up. Tried power up M2, connect via App, power up TH1, place by M2, connect to M2 via app, press +, search appears but nothing seen. ---
**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 21, 2025, 3:12am UTC](https://community.inkbird.com/t/ibs-th1-plus-is-not-seen-by-ibs-m2-so-cannot-connect/166713/2 "2025-05-21T03:12:35Z")
Hello, Just to confirm the details, whether your connection steps are: Added via INKBIRD app → IBS-M2 settings page → ‘+’ on the top right corner. Instead of adding the sensor via the ‘+’ on the top right corner of the INKBIRD app home page. Please note the difference between them. Please refer to the link: > [@Q&A: How to connect the IBS-M2 to a sub-device (sensor)](https://community.inkbird.com/t/q-a-how-to-connect-the-ibs-m2-to-a-sub-device-sensor/56800/5): > > Sorry IBS-P03R is not compatible with IBS-M2. A gateway compatible with IBS-P03R is still under development. ---
**Author:** ![User\_1701638917747](https://avatars.discourse-cdn.com/v4/letter/u/9de053/32.png) [@User\_1701638917747](https://community.inkbird.com/u/User_1701638917747)\ **Post date:** [May 21, 2025, 9:35pm UTC](https://community.inkbird.com/t/ibs-th1-plus-is-not-seen-by-ibs-m2-so-cannot-connect/166713/3 "2025-05-21T21:35:11Z")
via INKBIRD app → IBS-M2 settings page → ‘+’ on the top right corner. Screenshot attached. ![IMG_8803](https://canada1.discourse-cdn.com/flex031/uploads/inkbird1/original/2X/4/4ec748de94d7ba905733de993ca097fc82a54e9b.png) ---
**Author:** ![User\_1701638917747](https://avatars.discourse-cdn.com/v4/letter/u/9de053/32.png) [@User\_1701638917747](https://community.inkbird.com/u/User_1701638917747)\ **Post date:** [May 21, 2025, 9:36pm UTC](https://community.inkbird.com/t/ibs-th1-plus-is-not-seen-by-ibs-m2-so-cannot-connect/166713/4 "2025-05-21T21:36:19Z")
Which just searches then stops after 60 secs. ![IMG_8805](https://canada1.discourse-cdn.com/flex031/uploads/inkbird1/original/2X/6/6652e29c31552588ad59ae3d25940335bfdddbc3.png) ---
**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 29, 2025, 6:53am UTC](https://community.inkbird.com/t/ibs-th1-plus-is-not-seen-by-ibs-m2-so-cannot-connect/166713/5 "2025-05-29T06:53:24Z")
Please check that the IBS-TH1 battery power is sufficient. Maybe we can verify the Bluetooth function of IBS-TH1. Please enable the Bluetooth and location function of your mobile phone. Please go through INKBIRD app homepage → “+” in the upper right corner → select “IBS-THS” model. IBS-TH1 can be connected directly to INKBIRD app via Bluetooth. Does it work? ---
**Author:** ![User\_1701638917747](https://avatars.discourse-cdn.com/v4/letter/u/9de053/32.png) [@User\_1701638917747](https://community.inkbird.com/u/User_1701638917747)\ **Post date:** [May 30, 2025, 9:42pm UTC](https://community.inkbird.com/t/ibs-th1-plus-is-not-seen-by-ibs-m2-so-cannot-connect/166713/6 "2025-05-30T21:42:11Z")
Yes when trying add from the app home page I can elect IBS-TH and all the IBS-TH1 do show up on the search. They can be connected but only one at a time as each one replaces the prior. I notice that the App does not read their Mac address and thus I suspect think they are all the same sensor. Screenshots are attached. ![58A90684-CE9A-4C79-9EEE-DDB65ACE3109_1_105_c](https://canada1.discourse-cdn.com/flex031/uploads/inkbird1/original/2X/2/2d719330360229e2c47ac16af201c6e3851985fa.jpeg) ---
**Author:** ![User\_1701638917747](https://avatars.discourse-cdn.com/v4/letter/u/9de053/32.png) [@User\_1701638917747](https://community.inkbird.com/u/User_1701638917747)\ **Post date:** [May 30, 2025, 9:42pm UTC](https://community.inkbird.com/t/ibs-th1-plus-is-not-seen-by-ibs-m2-so-cannot-connect/166713/7 "2025-05-30T21:42:59Z")
> [@User\_1701638917747](#): > > all the IBS-TH1 do show up on the search. ![67B43702-787F-4829-8229-734E1B42F636_1_105_c](https://canada1.discourse-cdn.com/flex031/uploads/inkbird1/original/2X/b/b780324eabad7bb7bd0773fd69156fb08251e467.jpeg) ---
**Author:** ![User\_1701638917747](https://avatars.discourse-cdn.com/v4/letter/u/9de053/32.png) [@User\_1701638917747](https://community.inkbird.com/u/User_1701638917747)\ **Post date:** [May 30, 2025, 9:43pm UTC](https://community.inkbird.com/t/ibs-th1-plus-is-not-seen-by-ibs-m2-so-cannot-connect/166713/8 "2025-05-30T21:43:37Z")
I notice that the App does not read their Mac address and thus I suspect think they are all the same sensor ![5C30CC30-8309-4D2C-8CC8-C9A34A8BA571_1_105_c](https://canada1.discourse-cdn.com/flex031/uploads/inkbird1/original/2X/5/5cb2d0e5cf8a7a1b04996900350c5a43f0ee4c89.jpeg)