for vehicle tracking and e.g. building temperature control. Sometimes one can find IoT, tracking, radiomodems etc. devices with bluetooth on.
Lidl xBeacon
Frogblue control system, for e.g. alarms, heating ...
https://play.google.com/store/apps/details?id=com.frogblue.go&hl=fi&gl=US
MC7010 5G wireless router (for outdoor use), sometimes with default PIN code.
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