Example #1
0
    def start_networking(self):
        log.info('Starting networking')

        from terkin.network import NetworkManager, WiFiException

        self.networking = NetworkManager(device=self, settings=self.settings)

        # Start WiFi.
        try:
            self.networking.start_wifi()

            # Wait for network interface to come up.
            self.networking.wait_for_nic()

            self.status.networking = True

        except WiFiException:
            log.error('Network connectivity not available, WiFi failed')
            self.status.networking = False

        # Start UDP server for pulling device into maintenance mode.
        self.networking.start_modeserver()

        # Initialize LoRa device.
        if self.settings.get('networking.lora.antenna_attached'):
            try:
                self.networking.start_lora()
            except:
                log.exception('Unable to start LoRa subsystem')
        else:
            log.info(
                "[LoRa] Disabling LoRa interface as no antenna has been attached. "
                "ATTENTION: Running LoRa without antenna will wreck your device."
            )
Example #2
0
    def start_networking(self):
        """ """
        log.info('Starting networking')

        from terkin.network import NetworkManager, WiFiException

        self.networking = NetworkManager(device=self, settings=self.settings)

        if self.settings.get('networking.wifi.enabled', True):
            # Start WiFi.
            try:
                self.networking.start_wifi()

            except Exception as ex:
                log.exc(ex, 'Starting WiFi networking failed')
                self.status.networking = False
                return

            # Wait for network stack to come up.
            try:
                self.networking.wait_for_ip_stack(timeout=5)
                self.status.networking = True
            except Exception as ex:
                log.exc(ex, 'IP stack not available')
                self.status.networking = False

            try:
                self.networking.start_services()
            except Exception as ex:
                log.exc(ex, 'Starting network services failed')
        else:
            log.info("[WiFi] interface disabled in settings.")

        # Initialize LoRa device.
        if self.application_info.platform_info.device_name in [
                'LoPy', 'LoPy4', 'FiPy'
        ]:
            if self.settings.get('networking.lora.enabled'):
                if self.settings.get('networking.lora.antenna_attached'):
                    try:
                        self.networking.start_lora()
                        self.status.networking = True
                    except Exception as ex:
                        log.exc(ex, 'Unable to start LoRa subsystem')
                        self.status.networking = False
                else:
                    log.info(
                        "[LoRa] Disabling LoRa interface as no antenna has been attached. "
                        "ATTENTION: Running LoRa without antenna will wreck your device."
                    )
            else:
                log.info(
                    "[LoRa] interface disabled in settings. Skip LoRa initialisation."
                )
        else:
            log.info("[LoRa] This is not a LoRa capable device.")
Example #3
0
class TerkinDevice:
    def __init__(self, name=None, version=None, settings=None):

        self.name = name
        self.version = version
        self.settings = settings

        # Conditionally enable terminal on UART0. Default: False.
        self.terminal = Terminal(self.settings)
        self.terminal.start()

        self.device_id = get_device_id()

        self.networking = None
        self.telemetry = None

        self.wdt = None
        self.rtc = None

        self.status = DeviceStatus()

    @property
    def appname(self):
        return '{} {}'.format(self.name, self.version)

    def start_networking(self):
        log.info('Starting networking')

        from terkin.network import NetworkManager, WiFiException

        self.networking = NetworkManager(device=self, settings=self.settings)

        # Start WiFi.
        try:
            self.networking.start_wifi()

            # Wait for network interface to come up.
            self.networking.wait_for_nic()

            self.status.networking = True

        except WiFiException:
            log.error('Network connectivity not available, WiFi failed')
            self.status.networking = False

        # Start UDP server for pulling device into maintenance mode.
        self.networking.start_modeserver()

        # Initialize LoRa device.
        if self.settings.get('networking.lora.antenna_attached'):
            try:
                self.networking.start_lora()
            except:
                log.exception('Unable to start LoRa subsystem')
        else:
            log.info(
                "[LoRa] Disabling LoRa interface as no antenna has been attached. "
                "ATTENTION: Running LoRa without antenna will wreck your device."
            )

        # Inform about networking status.
        #self.networking.print_status()

    def start_watchdog(self):
        """
        The WDT is used to restart the system when the application crashes and
        ends up into a non recoverable state. After enabling, the application
        must "feed" the watchdog periodically to prevent it from expiring and
        resetting the system.
        """
        # https://docs.pycom.io/firmwareapi/pycom/machine/wdt.html

        if not self.settings.get('main.watchdog.enabled', False):
            log.info('Skipping watchdog timer (WDT)')
            return

        watchdog_timeout = self.settings.get('main.watchdog.timeout', 10000)
        log.info('Starting the watchdog timer (WDT) with timeout {}ms'.format(
            watchdog_timeout))

        from machine import WDT
        self.wdt = WDT(timeout=watchdog_timeout)

        # Feed Watchdog once.
        self.wdt.feed()

    def feed_watchdog(self):
        if self.wdt is not None:
            log.info('Feeding Watchdog')
            self.wdt.feed()

    def start_rtc(self):
        """
        The RTC is used to keep track of the date and time.
        """
        # https://docs.pycom.io/firmwareapi/pycom/machine/rtc.html
        # https://medium.com/@chrismisztur/pycom-uasyncio-installation-94931fc71283
        import time
        from machine import RTC
        self.rtc = RTC()
        # TODO: Use values from configuration settings here.
        self.rtc.ntp_sync("pool.ntp.org", 360)
        while not self.rtc.synced():
            time.sleep_ms(50)
        log.info('RTC: %s', self.rtc.now())

    def run_gc(self):
        """
        Run a garbage collection.
        https://docs.pycom.io/firmwareapi/micropython/gc.html
        """
        import gc
        gc.collect()

    def configure_rgb_led(self):
        """
        https://docs.pycom.io/tutorials/all/rgbled.html
        """
        import pycom

        # Enable or disable heartbeat.
        rgb_led_heartbeat = self.settings.get('main.rgb_led.heartbeat', True)
        pycom.heartbeat(rgb_led_heartbeat)
        pycom.heartbeat_on_boot(rgb_led_heartbeat)

        # Alternative signalling.
        # Todo: Run this in a separate thread in order not to delay execution of main program flow.
        if not rgb_led_heartbeat:
            for _ in range(2):
                pycom.rgbled(0x001100)
                time.sleep(0.15)
                pycom.rgbled(0x000000)
                time.sleep(0.10)

    def power_off_lte_modem(self):
        """
        We don't use LTE yet.

        https://community.hiveeyes.org/t/lte-modem-des-pycom-fipy-komplett-stilllegen/2161
        https://forum.pycom.io/topic/4877/deepsleep-on-batteries/10
        """

        import pycom
        """
        if not pycom.lte_modem_en_on_boot():
            log.info('Skip turning off LTE modem')
            return
        """

        log.info('Turning off LTE modem')
        try:
            from network import LTE

            # Invoking this will cause `LTE.deinit()` to take around 6(!) seconds.
            #log.info('Enabling LTE modem on boot')
            #pycom.lte_modem_en_on_boot(True)

            log.info('Turning off LTE modem on boot')
            pycom.lte_modem_en_on_boot(False)

            log.info('Invoking LTE.deinit()')
            lte = LTE()
            lte.deinit()

        except:
            log.exception('Shutting down LTE modem failed')

    def power_off_bluetooth(self):
        """
        We don't use Bluetooth yet.
        """
        log.info('Turning off Bluetooth')
        try:
            from network import Bluetooth
            bluetooth = Bluetooth()
            bluetooth.deinit()
        except:
            log.exception('Shutting down Bluetooth failed')

    def start_telemetry(self):
        log.info('Starting telemetry')

        self.telemetry = TelemetryManager()

        # Read all designated telemetry targets from configuration settings.
        telemetry_targets = self.settings.get('telemetry.targets')

        # Compute list of all _enabled_ telemetry targets.
        telemetry_candidates = []
        for telemetry_target in telemetry_targets:
            if telemetry_target.get('enabled', False):
                telemetry_candidates.append(telemetry_target)

        # Create adapter objects for each enabled telemetry target.
        for telemetry_target in telemetry_candidates:
            try:
                self.create_telemetry_adapter(telemetry_target)
                self.feed_watchdog()

            except:
                log.exception(
                    'Creating telemetry adapter failed for target: %s',
                    telemetry_target)

    def create_telemetry_adapter(self, telemetry_target):
        # Create adapter object.
        telemetry_adapter = TelemetryAdapter(
            device=self,
            endpoint=telemetry_target['endpoint'],
            address=telemetry_target.get('address'),
            data=telemetry_target.get('data'),
            topology=telemetry_target.get('topology'),
            format=telemetry_target.get('format'),
            content_encoding=telemetry_target.get('encode'),
        )

        # Setup telemetry adapter.
        telemetry_adapter.setup()

        self.telemetry.add_adapter(telemetry_adapter)

    def enable_serial(self):
        # Disable these two lines if you don't want serial access.
        # The Pycom forum tells us that this is already incorporated into
        # more recent firmwares, so this is probably a thing of the past.
        #uart = machine.UART(0, 115200)
        #os.dupterm(uart)
        pass

    def print_bootscreen(self):
        """
        Print bootscreen.

        This contains important details about your device
        and the operating system running on it.
        """

        if not self.settings.get('main.logging.enabled', False):
            return

        # Todo: Maybe refactor to TerkinDatalogger.
        from uio import StringIO
        buffer = StringIO()

        def add(item=''):
            buffer.write(item)
            buffer.write('\n')

        # Program name and version.
        title = '{} {}'.format(self.name, self.version)

        add()
        add('=' * len(title))
        add(title)
        add('=' * len(title))

        # Machine runtime information.
        add('CPU freq     {} MHz'.format(machine.freq() / 1000000))
        add('Device id    {}'.format(self.device_id))
        add()

        # System memory info (in bytes)
        machine.info()
        add()

        # TODO: Python runtime information.
        add('{:8}: {}'.format('Python', sys.version))
        """
        >>> import os; os.uname()
        (sysname='FiPy', nodename='FiPy', release='1.20.0.rc7', version='v1.9.4-2833cf5 on 2019-02-08', machine='FiPy with ESP32', lorawan='1.0.2', sigfox='1.0.1')
        """
        runtime_info = os.uname()
        for key in dir(runtime_info):
            if key == '__class__':
                continue
            value = getattr(runtime_info, key)
            #print('value:', value)
            add('{:8}: {}'.format(key, value))
        add()
        add()

        # Todo: Add program authors, contributors and credits.

        log.info('\n' + buffer.getvalue())

    def power_off(self):
        self.networking.stop()

    def hibernate(self, interval, deepsleep=False):

        #logging.enable_logging()

        if deepsleep:

            # Prepare and invoke deep sleep.
            # https://docs.micropython.org/en/latest/library/machine.html#machine.deepsleep

            log.info('Preparing deep sleep')

            # Set wake up mode.
            self.set_wakeup_mode()

            # Invoke deep sleep.
            log.info('Entering deep sleep for {} seconds'.format(interval))
            self.terminal.stop()
            machine.deepsleep(int(interval * 1000))

        else:

            log.info('Entering light sleep for {} seconds'.format(interval))

            # Invoke light sleep.
            # https://docs.micropython.org/en/latest/library/machine.html#machine.sleep
            # https://docs.micropython.org/en/latest/library/machine.html#machine.lightsleep
            #
            # As "machine.sleep" seems to be a noop on Pycom MicroPython,
            # we will just use the regular "time.sleep" here.
            # machine.sleep(int(interval * 1000))
            time.sleep(interval)

    def resume(self):
        log.info('Reset cause and wakeup reason: %s',
                 MachineResetCause.humanize())

    def set_wakeup_mode(self):

        # Set wake up parameters.
        """
        The arguments are:

        - pins: a list or tuple containing the GPIO to setup for deepsleep wakeup.

        - mode: selects the way the configured GPIOs can wake up the module.
          The possible values are: machine.WAKEUP_ALL_LOW and machine.WAKEUP_ANY_HIGH.

        - enable_pull: if set to True keeps the pull up or pull down resistors enabled
          during deep sleep. If this variable is set to True, then ULP or capacitive touch
          wakeup cannot be used in combination with GPIO wakeup.

        -- https://community.hiveeyes.org/t/deep-sleep-with-fipy-esp32-on-micropython/1792/12

        This will yield a wake up reason like::

            'wakeup_reason': {'code': 1, 'message': 'PIN'}

        """

        # Todo: ``enable_pull`` or not?

        # From documentation.
        # machine.pin_sleep_wakeup(pins=['P8'], mode=machine.WAKEUP_ALL_LOW, enable_pull=True)

        # Let's try.
        #machine.pin_sleep_wakeup(pins=['P8'], mode=machine.WAKEUP_ALL_LOW, enable_pull=False)
        pass
Example #4
0
    def start_networking(self):
        """ 
        Start all configured networking devices.
        """
        log.info('Starting networking')

        from terkin.network import NetworkManager, WiFiException

        self.networking = NetworkManager(device=self, settings=self.settings)

        if self.settings.get('networking.wifi.enabled'):
            # Start WiFi.
            try:
                self.networking.start_wifi()

            except Exception as ex:
                log.exc(ex, 'Starting WiFi networking failed')
                self.status.networking = False
                return

            # Wait for network stack to come up.
            try:
                self.networking.wait_for_ip_stack(timeout=5)
                self.status.networking = True
            except Exception as ex:
                log.exc(ex, 'IP stack not available')
                self.status.networking = False

        else:
            log.info("[WiFi] Interface not enabled in settings.")

        try:
            self.networking.start_services()
        except Exception as ex:
            log.exc(ex, 'Starting network services failed')

        # Initialize LoRa device.
        platform_info = self.application_info.platform_info
        is_pycom_lora = platform_info.device_name in ['LoPy', 'LoPy4', 'FiPy']
        is_dragino = platform_info.vendor == platform_info.MICROPYTHON.RaspberryPi
        if self.settings.get('networking.lora.enabled'):
            if is_pycom_lora or is_dragino:
                if self.settings.get('networking.lora.antenna_attached'):
                    try:
                        self.networking.start_lora()
                        self.status.networking = True
                    except Exception as ex:
                        log.exc(ex, 'Unable to start LoRa subsystem')
                        self.status.networking = False
                else:
                    log.info(
                        "[LoRa] Disabling LoRa interface as no antenna has been attached. "
                        "ATTENTION: Running LoRa without antenna will wreck your device."
                    )
            else:
                log.error("[LoRa] This is not a LoRa capable device.")
        else:
            log.info("[LoRa] Interface not enabled in settings.")

        # Initialize LTE modem.
        if self.settings.get('networking.lte.enabled'):
            try:
                self.networking.start_lte()
                self.status.networking = True
            except Exception as ex:
                log.exc(ex, 'Unable to start LTE modem')
                self.status.networking = False
        else:
            log.info("[LTE]  Interface not enabled in settings.")

        # Initialize GPRS modem.
        if self.settings.get('networking.gprs.enabled'):
            try:
                self.networking.start_gprs()
                self.status.networking = True
            except Exception as ex:
                log.exc(ex, 'Unable to start GPRS modem')
                self.status.networking = False
        else:
            log.info("[GPRS] Interface not enabled in settings.")
Example #5
0
class TerkinDevice:
    """
    Singleton object for enabling different device-related subsystems
    and providing lowlevel routines for sleep/resume functionality.
    """
    def __init__(self, application_info: ApplicationInfo):

        self.application_info = application_info
        self.platform_info = application_info.platform_info

        self.name = application_info.name
        self.version = application_info.version
        self.settings = application_info.settings

        self.status = DeviceStatus()
        self.watchdog = Watchdog(device=self, settings=self.settings)

        # Conditionally enable terminal on UART0. Default: False.
        #try:
        #    self.terminal = Terminal(self.settings)
        #    self.terminal.start()
        #except Exception as ex:
        #    log.exc(ex, 'Enabling Terminal failed')

        self.device_id = get_device_id()

        self.networking = None
        self.telemetry = None

        self.rtc = None

    def start_networking(self):
        """ 
        Start all configured networking devices.
        """
        log.info('Starting networking')

        from terkin.network import NetworkManager, WiFiException

        self.networking = NetworkManager(device=self, settings=self.settings)

        if self.settings.get('networking.wifi.enabled'):
            # Start WiFi.
            try:
                self.networking.start_wifi()

            except Exception as ex:
                log.exc(ex, 'Starting WiFi networking failed')
                self.status.networking = False
                return

            # Wait for network stack to come up.
            try:
                self.networking.wait_for_ip_stack(timeout=5)
                self.status.networking = True
            except Exception as ex:
                log.exc(ex, 'IP stack not available')
                self.status.networking = False

        else:
            log.info("[WiFi] Interface not enabled in settings.")

        try:
            self.networking.start_services()
        except Exception as ex:
            log.exc(ex, 'Starting network services failed')

        # Initialize LoRa device.
        platform_info = self.application_info.platform_info
        is_pycom_lora = platform_info.device_name in ['LoPy', 'LoPy4', 'FiPy']
        is_dragino = platform_info.vendor == platform_info.MICROPYTHON.RaspberryPi
        if self.settings.get('networking.lora.enabled'):
            if is_pycom_lora or is_dragino:
                if self.settings.get('networking.lora.antenna_attached'):
                    try:
                        self.networking.start_lora()
                        self.status.networking = True
                    except Exception as ex:
                        log.exc(ex, 'Unable to start LoRa subsystem')
                        self.status.networking = False
                else:
                    log.info(
                        "[LoRa] Disabling LoRa interface as no antenna has been attached. "
                        "ATTENTION: Running LoRa without antenna will wreck your device."
                    )
            else:
                log.error("[LoRa] This is not a LoRa capable device.")
        else:
            log.info("[LoRa] Interface not enabled in settings.")

        # Initialize LTE modem.
        if self.settings.get('networking.lte.enabled'):
            try:
                self.networking.start_lte()
                self.status.networking = True
            except Exception as ex:
                log.exc(ex, 'Unable to start LTE modem')
                self.status.networking = False
        else:
            log.info("[LTE]  Interface not enabled in settings.")

        # Initialize GPRS modem.
        if self.settings.get('networking.gprs.enabled'):
            try:
                self.networking.start_gprs()
                self.status.networking = True
            except Exception as ex:
                log.exc(ex, 'Unable to start GPRS modem')
                self.status.networking = False
        else:
            log.info("[GPRS] Interface not enabled in settings.")

        # Inform about networking status.
        #self.networking.print_status()

    def start_rtc(self):
        """
        The RTC is used to keep track of the date and time.
        Syncs RTC with a NTP server.
        """
        # https://docs.pycom.io/firmwareapi/pycom/machine/rtc.html
        # https://medium.com/@chrismisztur/pycom-uasyncio-installation-94931fc71283
        import time
        from machine import RTC
        self.rtc = RTC()
        # TODO: Use values from configuration settings here.
        self.rtc.ntp_sync("pool.ntp.org", 360)
        while not self.rtc.synced():
            time.sleep_ms(50)
        log.info('RTC: %s', self.rtc.now())

    def run_gc(self):
        """
        Curate the garbage collector.
        https://docs.pycom.io/firmwareapi/micropython/gc.html

        For a "quick fix", issue the following periodically.
        https://community.hiveeyes.org/t/timing-things-on-micropython-for-esp32/2329/9

        """
        import gc
        log.info('Start curating the garbage collector')
        gc.threshold(gc.mem_free() // 4 + gc.mem_alloc())
        log.info('Collecting garbage')
        gc.collect()
        #log.info('Curating the garbage collector finished')
        log.info('Curating the garbage collector finished. Free memory: %s',
                 gc.mem_free())

    def configure_rgb_led(self):
        """https://docs.pycom.io/tutorials/all/rgbled.html"""
        if self.platform_info.vendor == self.platform_info.MICROPYTHON.Pycom:
            import pycom
            # Enable or disable heartbeat.
            rgb_led_heartbeat = self.settings.get('main.rgb_led.heartbeat',
                                                  True)
            terkin_blink_pattern = self.settings.get('main.rgb_led.terkin',
                                                     False)
            if terkin_blink_pattern:
                rgb_led_heartbeat = False
            pycom.heartbeat(rgb_led_heartbeat)
            pycom.heartbeat_on_boot(rgb_led_heartbeat)

    def blink_led(self, color, count=1):
        """

        :param color: 
        :param count:  (Default value = 1)

        """
        if self.platform_info.vendor == self.platform_info.MICROPYTHON.Pycom:
            import pycom
            terkin_blink_pattern = self.settings.get('main.rgb_led.terkin',
                                                     False)
            if terkin_blink_pattern:
                for _ in range(count):
                    pycom.rgbled(color)
                    time.sleep(0.15)
                    pycom.rgbled(0x000000)
                    time.sleep(0.10)

    def start_telemetry(self):
        """ """
        log.info('Starting telemetry')

        self.telemetry = TelemetryManager()

        # Read all designated telemetry targets from configuration settings.
        telemetry_targets = self.settings.get('telemetry.targets', [])

        # Compute list of all _enabled_ telemetry targets.
        telemetry_candidates = []
        for telemetry_target in telemetry_targets:
            if telemetry_target.get('enabled', False):
                telemetry_candidates.append(telemetry_target)

        # Create adapter objects for each enabled telemetry target.
        for telemetry_target in telemetry_candidates:
            try:
                self.create_telemetry_adapter(telemetry_target)
                self.watchdog.feed()

            except Exception as ex:
                log.exc(ex, 'Creating telemetry adapter failed for target: %s',
                        telemetry_target)

    def create_telemetry_adapter(self, telemetry_target):
        """

        :param telemetry_target: 

        """
        # Create adapter object.
        telemetry_adapter = TelemetryAdapter(device=self,
                                             target=telemetry_target)

        # Setup telemetry adapter.
        telemetry_adapter.setup()

        self.telemetry.add_adapter(telemetry_adapter)

    def enable_serial(self):
        """ """
        # Disable these two lines if you don't want serial access.
        # The Pycom forum tells us that this is already incorporated into
        # more recent firmwares, so this is probably a thing of the past.
        #uart = machine.UART(0, 115200)
        #os.dupterm(uart)
        pass

    def print_bootscreen(self):
        """Print bootscreen.
        
        This contains important details about your device
        and the operating system running on it.


        """

        if not self.settings.get('main.logging.enabled', False):
            return

        # Todo: Maybe refactor to TerkinDatalogger.
        from uio import StringIO
        buffer = StringIO()

        def add(item=''):
            """

            :param item:  (Default value = '')

            """
            buffer.write(item)
            buffer.write('\n')

        # Program name and version.
        title = '{} {}'.format(self.name, self.version)

        add()
        add('=' * len(title))
        add(title)
        add('=' * len(title))

        # Machine runtime information.
        frequency = machine.freq() / 1000000

        add('Device id    {}'.format(self.device_id))
        add()
        add('CPU freq     {}   MHz'.format(frequency))
        try:
            import pycom
            free_heap = pycom.get_free_heap()
            add('{:13}{:>7} {}'.format('Free heap', free_heap[0] / 1000.0,
                                       'kB'))
            add('{:13}{:>7} {}'.format('Free PSRAM', free_heap[1] / 1000.0,
                                       'kB'))
        except:
            pass
        add()

        # System memory info (in bytes).
        """
        if hasattr(machine, 'info'):
            machine.info()
            add()
        """

        # TODO: Python runtime information.
        add('{:8}: {}'.format('Python', sys.version.replace('\n', '')))
        add('{:8}: {}'.format('platform', sys.platform))
        """
        >>> import os; os.uname()
        (sysname='FiPy', nodename='FiPy', release='1.20.0.rc7', version='v1.9.4-2833cf5 on 2019-02-08', machine='FiPy with ESP32', lorawan='1.0.2', sigfox='1.0.1')
        """
        runtime_info = os.uname()
        #print(dir(runtime_info))
        for key in dir(runtime_info):
            if key.startswith('__') or key.startswith('n_'):
                continue
            value = getattr(runtime_info, key)
            if callable(value):
                continue
            #print('value:', value)
            add('{:8}: {}'.format(key, value))
        add()

        # Todo: Add program authors, contributors and credits.

        log.info('\n' + buffer.getvalue())

    def power_off_lte_modem(self):
        """
        We don't use LTE yet.

        Important
        =========
        Once the LTE radio is initialized, it must be de-initialized
        before going to deepsleep in order to ensure minimum power consumption.
        This is required due to the LTE radio being powered independently and
        allowing use cases which require the system to be taken out from
        deepsleep by an event from the LTE network (data or SMS received for
        instance).

        Note
        ====
        When using the expansion board and the FiPy together, the RTS/CTS
        jumpers MUST be removed as those pins are being used by the LTE radio.
        Keeping those jumpers in place will lead to erratic operation and
        higher current consumption specially while in deepsleep.

        -- https://forum.pycom.io/topic/3090/fipy-current-consumption-analysis/17

        See also
        ========
        - https://community.hiveeyes.org/t/lte-modem-des-pycom-fipy-komplett-stilllegen/2161
        - https://forum.pycom.io/topic/4877/deepsleep-on-batteries/10
        """

        log.info('Turning off LTE modem')
        try:
            import pycom
            from network import LTE

            log.info('Turning off LTE modem on boot')
            pycom.lte_modem_en_on_boot(False)

            # Disables LTE modem completely. This presumably reduces the power
            # consumption to the minimum. Call this before entering deepsleep.
            log.info('Invoking LTE.deinit()')
            lte = LTE()
            lte.deinit(detach=False, reset=True)

        except Exception as ex:
            log.exc(ex, 'Shutting down LTE modem failed')

    def power_off_bluetooth(self):
        """We don't use Bluetooth yet."""

        if self.platform_info.vendor == self.platform_info.MICROPYTHON.Vanilla:
            log.warning(
                "FIXME: Skip touching Bluetooth on vanilla MicroPython "
                "platforms as we don't use Bluetooth yet")
            return

        log.info('Turning off Bluetooth')
        try:
            from network import Bluetooth
            bluetooth = Bluetooth()
            bluetooth.deinit()
        except Exception as ex:
            log.exc(ex, 'Shutting down Bluetooth failed')

    def hibernate(self, interval, lightsleep=False, deepsleep=False):
        """

        :param interval:
        :param lightsleep:  (Default value = False)
        :param deepsleep:  (Default value = False)

        """

        #logging.enable_logging()

        if deepsleep:

            # Prepare and invoke deep sleep.
            # https://docs.micropython.org/en/latest/library/machine.html#machine.deepsleep

            log.info('Preparing deep sleep')

            # Set wake up mode.
            self.set_wakeup_mode()

            # Invoke deep sleep.
            log.info('Entering deep sleep for {} seconds'.format(interval))
            #self.terminal.stop()
            machine.deepsleep(int(interval * 1000))

        else:

            # Adjust watchdog for interval.
            self.watchdog.adjust_for_interval(interval)

            # Invoke light sleep.
            # https://docs.micropython.org/en/latest/library/machine.html#machine.sleep
            # https://docs.micropython.org/en/latest/library/machine.html#machine.lightsleep
            #
            # As "machine.sleep" seems to be a noop on Pycom MicroPython,
            # we will just use the regular "time.sleep" here.
            # machine.sleep(int(interval * 1000))
            machine.idle()

            if lightsleep:
                log.info(
                    'Entering light sleep for {} seconds'.format(interval))
                machine.sleep(int(interval * 1000))

            else:
                # Normal wait.
                log.info('Waiting for {} seconds'.format(interval))
                time.sleep(interval)

    def resume(self):
        """ """
        try:
            from terkin.pycom import MachineResetCause
            log.info('Reset cause and wakeup reason: %s',
                     MachineResetCause().humanize())
        except Exception as ex:
            log.exc(ex, 'Could not determine reset cause and wakeup reason')

    def set_wakeup_mode(self):
        """ """

        # Set wake up parameters.
        """
        The arguments are:

        - pins: a list or tuple containing the GPIO to setup for deepsleep wakeup.

        - mode: selects the way the configured GPIOs can wake up the module.
          The possible values are: machine.WAKEUP_ALL_LOW and machine.WAKEUP_ANY_HIGH.

        - enable_pull: if set to True keeps the pull up or pull down resistors enabled
          during deep sleep. If this variable is set to True, then ULP or capacitive touch
          wakeup cannot be used in combination with GPIO wakeup.

        -- https://community.hiveeyes.org/t/deep-sleep-with-fipy-esp32-on-micropython/1792/12

        This will yield a wake up reason like::

            'wakeup_reason': {'code': 1, 'message': 'PIN'}

        """

        # Todo: ``enable_pull`` or not?

        # From documentation.
        # machine.pin_sleep_wakeup(pins=['P8'], mode=machine.WAKEUP_ALL_LOW, enable_pull=True)

        # Let's try.
        #log.info('Configuring Pin 4 for wakeup from deep sleep')
        #machine.pin_sleep_wakeup(pins=['P4'], mode=machine.WAKEUP_ALL_LOW, enable_pull=True)
        #machine.pin_sleep_wakeup(pins=['P4'], mode=machine.WAKEUP_ANY_HIGH, enable_pull=True)
        pass