def load(self, data): """ Parses data buffer to set member variables. data : list of bytes Raises exception when parsing fails. """ streamBuf = BufferReader(data) samplesTypeVal = streamBuf.getUInt8() self.samplesType = PowerSamplesType(samplesTypeVal) # Throws exception of value is not in enum self.index = streamBuf.getUInt8() self.count = streamBuf.getUInt16() self.timestamp = streamBuf.getUInt32() self.delayUs = streamBuf.getUInt16() self.sampleIntervalUs = streamBuf.getUInt16() streamBuf.skip(2) self.offset = streamBuf.getInt16() self.multiplier = streamBuf.getFloat() self.samples = [] for i in range(0, self.count): self.samples.append(streamBuf.getInt16())
def parseSetupState(reader: BufferReader):
packet = AdvCrownstoneSetupState()
packet.switchState = SwitchState(reader.getUInt8())
packet.flags = AdvFlags(reader.getUInt8())
packet.temperature = reader.getInt8()
powerFactor = reader.getInt8()
realPower = reader.getInt16()
packet.powerFactor = float(powerFactor) / 127.0
# we cannot have a 0 for a power factor.To avoid division by 0, we set it to be either 0.01 or -0.01
if 0 <= packet.powerFactor < 0.01:
packet.powerFactor = 0.01
elif -0.01 < packet.powerFactor < 0:
packet.powerFactor = -0.01
packet.powerUsageReal = float(realPower) / 8.0
packet.powerUsageApparent = packet.powerUsageReal / packet.powerFactor
packet.errorBitmask = reader.getInt32()
packet.uniqueIdentifier = reader.getUInt8()
return packet
def parseErrorPacket(reader: BufferReader):
packet = AdvErrorPacket()
_parseErrorPacket(packet, reader)
realPower = reader.getInt16()
packet.powerUsageReal = float(realPower) / 8.0
return packet
def _getElementValues(
self,
elementType: int, # TODO: make enum
elementSize: int,
elementData: list) -> list:
bufferReader = BufferReader(elementData)
dataSize = len(elementData)
if dataSize % elementSize != 0:
_LOGGER.warning(
f"Remaining data with element size of {elementSize} and element data of size {dataSize}"
)
return []
vals = []
numElements = int(dataSize / elementSize)
_LOGGER.debug(
f"dataSize={dataSize} elementSize={elementSize} numElements={numElements}"
)
for i in range(0, numElements):
if elementType == 0:
# Signed integer
if elementSize == 1:
vals.append(bufferReader.getInt8())
elif elementSize == 2:
vals.append(bufferReader.getInt16())
elif elementSize == 4:
vals.append(bufferReader.getInt32())
elif elementSize == 8:
vals.append(bufferReader.getInt64())
else:
_LOGGER.warning(
f"Unknown type: element with type {elementType} and size {elementSize}"
)
return []
elif elementType == 1:
# Unsigned integer
if elementSize == 1:
vals.append(bufferReader.getUInt8())
elif elementSize == 2:
vals.append(bufferReader.getUInt16())
elif elementSize == 4:
vals.append(bufferReader.getUInt32())
elif elementSize == 8:
vals.append(bufferReader.getUInt64())
else:
_LOGGER.warning(
f"Unknown type: element with type {elementType} and size {elementSize}"
)
return []
elif elementType == 2:
# Floating point
if elementSize == 4:
vals.append(bufferReader.getFloat())
else:
_LOGGER.warning(
f"Unknown type: element with type {elementType} and size {elementSize}"
)
return []
return vals
