def find_characteristic(self, uuid):
        for char in self.list_characteristics():
            if char.uuid == uuid:
                return char
        return None
Return the first child characteristic found that has the specified
dataset/ETHPy150Open adafruit/Adafruit_Python_BluefruitLE/Adafruit_BluefruitLE/interfaces/gatt.py/GattService.find_characteristic