Ibs-th2 sensor connecting to ibs-m1s gateway connectivity issue

How do you connect the newer ibs-th2 sensor to the ibs-m1s gateway?

Please make sure the IBS-M1 is connected to the INKBIRD app.
Please put IBS-TH2 next to IBS-M1 to reinstall the batteries, IBS-M1 will automatically search for nearby sensor signals and connect.