50 lines
1.4 KiB
Python
50 lines
1.4 KiB
Python
# SPDX-FileCopyrightText: 2019 Dave Astels for Adafruit Industries
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#
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# SPDX-License-Identifier: MIT
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"""
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BLE based message handler for CircuitPython logging.
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Adafruit invests time and resources providing this open source code.
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Please support Adafruit and open source hardware by purchasing
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products from Adafruit!
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Written by Dave Astels for Adafruit Industries
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Copyright (c) 2018 Adafruit Industries
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Licensed under the MIT license.
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All text above must be included in any redistribution.
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"""
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from adafruit_logging import Handler
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from adafruit_ble.uart import UARTServer
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class BLEHandler(Handler):
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"""Send logging output to the BLE uart port."""
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def __init__(self):
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"""Create an instance.
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:param uart: the busio.UART instance to which to write messages
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"""
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self._advertising_now = False
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self._uart = UARTServer()
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self._uart.start_advertising()
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def format(self, record):
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"""Generate a string to log.
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:param record: The record (message object) to be logged
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"""
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return super().format(record) + '\r\n'
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def emit(self, record):
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"""Generate the message and write it to the UART.
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:param record: The record (message object) to be logged
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"""
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while not self._uart.connected:
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pass
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data = bytes(self.format(record), 'utf-8')
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self._uart.write(data)
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