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device_info.py
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device_info.py
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# Example of displaying the device information service (DIS) info for a UART device.
#
# !!! NOTE !!!
#
# Only works on Mac OSX at this time. On Linux bluez appears to hide the DIS
# service entirely. :(
#
# !!! NOTE !!!
#
# Author: Tony DiCola
import Adafruit_BluefruitLE
from Adafruit_BluefruitLE.services import UART, DeviceInformation
# Get the BLE provider for the current platform.
ble = Adafruit_BluefruitLE.get_provider()
# Main function implements the program logic so it can run in a background
# thread. Most platforms require the main thread to handle GUI events and other
# asyncronous events like BLE actions. All of the threading logic is taken care
# of automatically though and you just need to provide a main function that uses
# the BLE provider.
def main():
# Clear any cached data because both bluez and CoreBluetooth have issues with
# caching data and it going stale.
ble.clear_cached_data()
# Get the first available BLE network adapter and make sure it's powered on.
adapter = ble.get_default_adapter()
# adapter.power_on()
print('Using adapter: {0}'.format(adapter.name))
# Disconnect any currently connected UART devices. Good for cleaning up and
# starting from a fresh state.
print('Disconnecting any connected UART devices...')
UART.disconnect_devices()
# Scan for UART devices.
print('Searching for UART device...')
try:
adapter.start_scan()
# Search for the first UART device found (will time out after 60 seconds
# but you can specify an optional timeout_sec parameter to change it).
device = UART.find_device()
if device is None:
raise RuntimeError('Failed to find UART device!')
else:
print 'uart device is gevonden'
finally:
# Make sure scanning is stopped before exiting.
adapter.stop_scan()
print('Connecting to device...')
device.connect() # Will time out after 60 seconds, specify timeout_sec parameter
# to change the timeout.
# Once connected do everything else in a try/finally to make sure the device
# is disconnected when done.
try:
# Wait for service discovery to complete for the DIS service. Will
# time out after 60 seconds (specify timeout_sec parameter to override).
print('Discovering services...')
DeviceInformation.discover(device)
# Once service discovery is complete create an instance of the service
# and start interacting with it.
dis = DeviceInformation(device)
# Print out the DIS characteristics.
print('Manufacturer: {0}'.format(dis.manufacturer))
print('Model: {0}'.format(dis.model))
print('Serial: {0}'.format(dis.serial))
print('Hardware Revision: {0}'.format(dis.hw_revision))
print('Software Revision: {0}'.format(dis.sw_revision))
print('Firmware Revision: {0}'.format(dis.fw_revision))
print('System ID: {0}'.format(dis.system_id))
print('Regulatory Cert: {0}'.format(dis.regulatory_cert))
print('PnP ID: {0}'.format(dis.pnp_id))
finally:
# Make sure device is disconnected on exit.
device.disconnect()
# Initialize the BLE system. MUST be called before other BLE calls!
ble.initialize()
# Start the mainloop to process BLE events, and run the provided function in
# a background thread. When the provided main function stops running, returns
# an integer status code, or throws an error the program will exit.
ble.run_mainloop_with(main)