def _log(self, action, handle_or_char, value, value_length):
if not self._debug:
return
if action == "Write":
data_as_hex = " ".join([
"{:02x}".format(b)
for b in [value[i] for i in range_(value_length)]
])
elif action == "Subscribe":
data_as_hex = ""
else:
data_as_hex = " ".join([
"{:02x}".format(ord(b))
for b in self._response_2_string_buffer(value)
])
if isinstance(handle_or_char, (uuid.UUID, string_types)):
handle = self.get_handle(handle_or_char)
elif isinstance(handle_or_char, int):
handle = handle_or_char
else:
# Assume it is a Pointer to a GattCharacteristic...
try:
handle = self.get_handle(self.get_uuid(handle_or_char))
except:
handle = -1
log.debug("{0:<6s} 0x{1:04x}: {2}".format(action, handle, data_as_hex))
def write_gatt_char_by_uuid(self, characteristic, command, length):
"""Write the desired data to the MetaWear board using pygatt backend.
:param uuid.UUID characteristic: The UUID to the characteristic
to write to.
:param POINTER(c_ubyte) command: Data to send.
:param int length: Number of characters in the command.
"""
data_to_send = bytearray([command[i] for i in range_(length)])
self.requester.char_write(str(self.get_uuid(characteristic)), data_to_send)
def write_gatt_char_by_uuid(self, characteristic, command, length):
"""Write the desired data to the MetaWear board
using pybluez/gattlib backend.
:param uuid.UUID characteristic_uuid: Characteristic UUID to write to.
:param str data_to_send: Data to send.
"""
characteristic_uuid = self.get_uuid(characteristic)
handle = self.get_handle(characteristic_uuid)
data_to_send = bytes(bytearray([command[i] for i in range_(length)]))
if not isinstance(data_to_send, string_types):
data_to_send = data_to_send.decode('latin1')
self.requester.write_by_handle_async(handle, data_to_send,
self._response)