adafruit_onewire.bus
¶
Provide access to a 1-Wire bus.
Author(s): Carter Nelson
- class adafruit_onewire.bus.OneWireAddress(rom)[source]¶
A class to represent a 1-Wire address.
- property crc¶
The 8 bit CRC.
- property family_code¶
The 8 bit family code.
- property rom¶
The unique 64 bit ROM code.
- property serial_number¶
The 48 bit serial number.
- class adafruit_onewire.bus.OneWireBus(pin)[source]¶
A class to represent a 1-Wire bus.
- static crc8(data)[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¶
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, *, start=0, end=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=False)[source]¶
Perform a reset and check for presence pulse.
- Parameters
required (bool) – require presence pulse
adafruit_onewire.device
¶
Provides access to a single device on the 1-Wire bus.
Author(s): Carter Nelson
- class adafruit_onewire.device.OneWireDevice(bus, address)[source]¶
A class to represent a single device on the 1-Wire bus.
- readinto(buf, *, start=0, end=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.