Why can't Huawei mobile phone connect to Xiaomi projector via Bluetooth?

Huawei's mobile phone can't connect to Xiaomi projector via Bluetooth, which may be caused by the distance between them.

Some mobile phones have similar detection ability and Bluetooth switch to turn on detection, so they should also be turned on; Keep the Bluetooth setting interface bright. Find the Bluetooth name of the mobile phone in the search interface, click Pairing, and agree to "Pairing" or enter the pairing code.

A projector is an optical instrument, which uses optical elements to enlarge the outline of a workpiece and project it onto a screen. The profile can be measured by transmitted light, and the surface shape of blind holes and the surface of parts can also be measured by reflected light. The projector is especially suitable for measuring complex contours and small workpieces, such as clock parts, stamping parts, electronic components, templates, molds, threads, gears and molding tools, with high detection efficiency and convenient use. It is widely used in measuring rooms and production workshops, especially in meeting occasions of instrument industry.