Migrating from 1.x to 2.0

2.0 gives USB and BLE devices one API (see Devices and commands) and removes what 1.x only kept for compatibility. The snapshot format, the upload and the naneos-uploader command are unchanged.

1.x	2.0
`manager.use_serial_connections(x)` / `get_serial_connection_status()`	`manager.use_serial = x` / `manager.use_serial`
`manager.use_ble_connections(x)` / `get_ble_connection_status()`	`manager.use_ble = x` / `manager.use_ble`
`manager.set_upload_status(x)` / `get_upload_status()`	`manager.upload_active = x` / `manager.upload_active`
`manager.set_gathering_interval_seconds(n)` / `get_...()`	`manager.gathering_interval_seconds = n` / `manager.gathering_interval_seconds`
`manager.get_seconds_until_next_upload()`	`manager.seconds_until_next_snapshot`
`manager.get_pending_upload_count()`	`manager.pending_upload_count`
`manager.get_connected_serial_devices()`, `get_connected_ble_devices()` (strings)	`manager.get_devices()` (device handles)
`manager.upload_blocked_devices`	removed (internal)
`NaneosUploadThread.upload(data)`	`naneos.upload_snapshot(data)`
`from naneos.iotweb import download_from_iotweb`	`from naneos.cloud.download import download_from_iotweb`, with the `download` extra
`device.write_line(cmd, n)`	`device.query(cmd)` (answer fields only, no timestamp) or `device.write(cmd)`
`Partector2(verb_freq=2)`, `set_verbose_freq(2)` (mode codes)	`Partector2(sample_rate_hz=10)`, `set_sample_rate(10)` (Hz)
`Partector2Pro(verb_freq=6)`	`Partector2Pro()` (default, `sample_rate_hz=None`), `set_sample_rate(None)`; a rate switches to the plain P2 line
`device.close(blocking, shutdown, verbose_reset)`	`device.close(reset_device=True)`, `device.power_off()`
`device.clear_data_cache()`	removed; `get_data()` returns everything received
`naneos.partector.scanPartector`, `scan_for_serial_partectors()`	`naneos.usb.partector.scan.scan_serial_ports()`
`naneos.serial_utils.list_serial_ports`	`naneos.usb.partector.scan.list_serial_ports`
`NaneosDeviceDataPoint.DEV_TYPE_` / `CONN_TYPE_`, its DataFrame static methods	`naneos.DeviceType` / `naneos.ConnectionType`, `naneos.frames`
`PartectorBluePrint`	`naneos.usb.partector.device.UsbPartector`

The modules were regrouped by transport, with one subpackage per device family (today: partector). from naneos import ... is unchanged; deep imports move:

1.x module	2.0 module
`naneos.partector.partector1` / `partector2` / `partector2_pro`	`naneos.usb.partector.device`
`naneos.partector.partector_serial_manager`, `naneos.partector`	`naneos.usb.partector.manager`, `naneos.usb`
`naneos.partector.scan`	`naneos.usb.partector.scan`
`naneos.partector.blueprints._data_structure`	`naneos.usb.partector.layouts`
`naneos.partector_ble.partector_ble_manager`, `naneos.partector_ble`	`naneos.ble.partector.manager`, `naneos.ble`
`naneos.partector_ble.partector_ble_connection` / `..._scanner`	`naneos.ble.partector.connection` / `naneos.ble.partector.scanner`
`naneos.partector_ble.decoders` / `partector_ble_decoder`	`naneos.ble.partector.characteristics` / `naneos.ble.partector.advertisement`
`naneos.manager.naneos_device_manager`	`naneos.manager`
`naneos.iotweb`	`naneos.cloud` (`upload`, `download`)
`naneos.protobuf` (`protoV1_pb2`)	`naneos.protobuf` with `proto_v2_pb2`; the upload uses the v2 endpoint `.../proto/v2/combined_data`
(new)	`naneos.usb.transport`: the serial transport shared by every USB device family
`naneos.uploader` (the `naneos-uploader` command)	`naneos.cli`
`naneos.logger`	unchanged

A serial device no longer reconnects on its own: when is_connected turns False, close it and create a new one (the managers do this for you). Its constructor raises ConnectionError instead of returning an unconnected object.