adafruit_onewire.bus
¶
Provide access to a 1-Wire bus.
Author(s): Carter Nelson
- class adafruit_onewire.bus.OneWireAddress(rom: bytearray)[source]¶
A class to represent a 1-Wire address.
- class adafruit_onewire.bus.OneWireBus(pin: Pin)[source]¶
A class to represent a 1-Wire bus.
- static crc8(data: bytearray) int [source]¶
Perform the 1-Wire CRC check on the provided data.
- Parameters
data (bytearray) – 8 byte array representing 64 bit ROM code
- property maximum_devices: int¶
The maximum number of devices the bus will scan for. Valid range is 1 to 255. It is an error to have more devices on the bus than this number. Having less is OK.
- readinto(buf: bytearray, *, start: int = 0, end: Optional[int] = None) None [source]¶
Read into
buf
from the device. The number of bytes read will be the length ofbuf
.If
start
orend
is provided, then the buffer will be sliced as ifbuf[start:end]
. This will not cause an allocation likebuf[start:end]
will so it saves memory.
- reset(required: bool = False) bool [source]¶
Perform a reset and check for presence pulse.
- Parameters
required (bool) – require presence pulse
- scan() List[OneWireAddress] [source]¶
Scan for devices on the bus and return a list of addresses.
adafruit_onewire.device
¶
Provides access to a single device on the 1-Wire bus.
Author(s): Carter Nelson
- class adafruit_onewire.device.OneWireDevice(bus: OneWireBus, address: OneWireAddress)[source]¶
A class to represent a single device on the 1-Wire bus.
- readinto(buf: bytearray, *, start: int = 0, end: Optional[int] = None) None [source]¶
Read into
buf
from the device. The number of bytes read will be the length ofbuf
.If
start
orend
is provided, then the buffer will be sliced as ifbuf[start:end]
. This will not cause an allocation likebuf[start:end]
will so it saves memory.