You can check for the connection and establish it if (!mBluetoothAdapter. */1 * * * * /bin/sh /root/check_presence_bt.When the intent is fired to connect to the remote device and the device is successfully established the Device Address is returned as extra data with the Flag EXTRA_DEVICE_ADDRESS. To launch the scan every minute, edit crontab: Give the right permissions to the script: # you may add here a command or a script to be executed when the device is unavailable bin/echo 0 > /sys/class/gpio/gpio1/value # you may need to change this depending on your router bin/echo 'Device is off or out of range, relay is OFF' # you may add here a command or a script to be executed when the device is available bin/echo 1 > /sys/class/gpio/gpio1/value # you may need to change this depending on your router # check for a specific MAC ADDRESS presence: Example 3-1 shows a Python program that looks for a nearby device with the. It is written for the Windows XP (Microsoft Bluetooth stack) and GNU/Linux (BlueZ stack). # scan for bluetooth devices and put the result into a variable: PyBluez is a Python extension module written in C that provides access to system Bluetooth resources in an object oriented, modular manner. my OpenWrt, Raspberry and Linux, personal forum: Nano /root/check_presence_bt.sh #!/bin/sh To pair and trust your device do the following: Note: The device should remain in “discoverable mode”, if you do not want to let your device discoverable, you need to pair it and trust it. In my case the desired MAC Address is 30:21:15:13:9C:29 To scan for remote devices and to discover your device MAC Address, put your device in “discoverable mode” and use the following command: But when using MCU releases of TI Dual-mode Bluetooth stack (like MSP430, MSP432, TIVA, STM32 etc,) you can use the VSSetBluetoothAddress API from the BTVS.c. Note: To enable bluetooth at boot put the above three lines in the /etc/rc.local file Opkg install kmod-bluetooth bluez-libs bluez-utils kmod-usb-core kmod-usb-uhci kmod-usb2 usbutils Note: The script simply scans for any bluetooth device in range, so there is no need of pairing or trusting the device you want to detect. Using a bluetooth USB dongle for a presence detection system to activate a relay by using a GPIO (or doing anything else), when a bluetooth device is detected, for example your phone.
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