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Created iBeacon driver (markdown)

gemu 2019-08-29 13:28:13 +02:00
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iBeacon-driver.md Normal file

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The ibeacon driver uses a BLE4 module hm17 which is capable of bluetooth central role
it is driven by AT cmds so there may be other compatible modules too. [(hm17)](https://www.ebay.de/itm/HM-17-BLE-4-1-Bluetooth-CC2541-UART-Modul-Wireless-neuer-als-HM10-HM11-HM17/223189729091?hash=item33f724ff43:g:yxoAAOSweTlbw8l7) (hm16 should also work)
all apple compatible ibeacon devices should work as beacons. this on is fully apple compatible and the battery last about a year [(ibeacon)](https://www.ebay.de/itm/NRF51822-2V-3-3V-bluetooth-4-0-wireless-module-for-ibeacon-base-stationABTYDE/193026333670?hash=item2cf1441be6:g:TT4AAOSwaMtcnXbr)
another special beacon is supported. it has a build in speaker and can be made beeping by mqtt cmd. the battery however last only about a month [(smart-tag)](https://www.ebay.de/itm/Smart-Tag-GPS-Tracker-Bluetooth-Anti-verlorene-Alarm-Key-Finder-Haustier-Kind/192587529819?_trkparms=aid%3D555018%26algo%3DPL.SIM%26ao%3D1%26asc%3D20190212102350%26meid%3Df9a325be14f84f9c9b09eda9217da1d2%26pid%3D100012%26rk%3D1%26rkt%3D12%26mehot%3Dpp%26sd%3D132960074783%26itm%3D192587529819%26pmt%3D1%26noa%3D0%26pg%3D2047675&_trksid=p2047675.c100012.m1985)
the hm17 is connected to GND , 3.3 V, RX to TX of ESP and TX to RX of ESP.
the module when delivered is in the peripheral mode and must be switched to central mode only once by the cmds
sensor52 1 and sensor52 2. the settings are stored inside the module.
sensor52 us sets the scanning interval in seconds s (5....n)
sensor52 ts sets the timeout interval in seconds s (10....n)
the driver reports all beacons found during a scan with its ID and RSSI.
if the beacon can no longer be found during scan and the timeout interval has passed the beacons RSSI is set to zero (0)
a beacon with beeper can made beeping by setting RSSI to 99 by MQTT cmd.