def raw_sample(io_sample):
"""raw_sample(channel) => A/D reading
Returns raw unscaled A/D light, temperature and humidity sample data"""
light = parseIS(io_sample)["AI1"]
temp = parseIS(io_sample)["AI2"]
hum = parseIS(io_sample)["AI3"]
item = {'t': temp, 'l': light, 'h': hum}
return item
def raw_sample(io_sample):
"""raw_sample(channel) => A/D reading
Returns raw unscaled A/D light, temperature and humidity sample data"""
light = parseIS(io_sample)["AI1"]
temp = parseIS(io_sample)["AI2"]
hum = parseIS(io_sample)["AI3"]
item = {'t': temp, 'l': light, 'h': hum}
return item
def raw_sample(self, io_sample=None):
"""raw_sample(channel) => A/D reading
Returns raw unscaled A/D light and temperature sample data"""
if io_sample is None:
io_sample = self.XBeeCommandGet("is")
light = parseIS(io_sample)["AI1"]
temp = parseIS(io_sample)["AI2"]
item = {'temperature': temp, 'light': light}
return item
def sample(self, channel, io_sample=None):
"""sample(channel) Returns digital sample data for specified channel"""
assert channel < len(control_lines), "Unrecognized channel"
assert channel >= 0, "Unrecognized channel"
if io_sample is None:
io_sample = self.XBeeCommandGet("is")
return parseIS(io_sample)["DIO%d" % channel_to_pin[channel]]
def raw_sample(self, channel, io_sample=None):
"""raw_sample(channel) => A/D reading
Returns raw unscaled A/D converter sample data"""
if channel >= len(ain_control_lines):
raise ValueError, "Unrecognized channel"
if io_sample is None:
io_sample = self.XBeeCommandGet("is")
return parseIS(io_sample)["AI%d" % channel]
def raw_sample(self, io_sample=None):
""" Provides a untransulated sample in dictionary form.
temperature, light, current."""
if io_sample is None:
io_sample = self.XBeeCommandGet("is")
parsed_struct = parseIS(io_sample)
return {'temperature': parsed_struct["AI2"], 'light': parsed_struct["AI1"],
'current': parsed_struct["AI3"]}
def sample(self, channel):
"""sample(channel)
Returns digital sample data for specified channel"""
if channel >= len(control_lines):
raise ValueError, "Unrecognized channel"
if digihw.get_channel_type(channel) != Digital:
raise ValueError, "Not a digital channel"
result = self.XBeeCommandGet("is")
return parseIS(result)["DIO%d" % channel]
def raw_sample(self, channel):
"""raw_sample(channel) => A/D reading
Returns raw unscaled A/D convertor sample data"""
if channel >= len(input_lines):
raise ValueError, "Unrecognized channel"
if digihw.get_channel_type(channel) != Analog:
raise ValueError, "Not an analog input channel"
# Calibrate every calInterval seconds
now = time.clock()
if debug:
print "time is %f, calTime is %f" % (now, calTime)
if now >= calTime + calInterval or now < calTime:
self.calibrate()
result = self.XBeeCommandGet("is")
val = float(parseIS(result)["AI%d" % channel])
val = scale * val
val1 = int(round(val))
return val1
def calibrate(self):
"""calibrate()
Calibrate analog inputs. Calculates scale and offset."""
global calTime, scale, offset
calTime = time.clock()
# XBee series 1 uses one calibration voltage on AN2
if self.device_type == XBeeSeries1:
if digihw.get_channel_type(1) != Analog:
raise ValueError, "No analog input channels"
# Configure channel 1 as analog input
self.XBeeCommandSet(input_lines[1], 2)
# Enable calibration voltage on channel 1
self.XBeeCommandSet("d4", 4)
time.sleep(0.010)
# Read calibration sample
result = self.XBeeCommandGet("is")
sample = parseIS(result)["AI1"]
if debug:
print "calibration sample is %d" % sample
# Return channel to operating mode
self.XBeeCommandSet("d4", 5)
time.sleep(0.010)
if sample == 0:
raise ValueError, "Calibration error: bad sample"
# Calulate linear scale and offset.
# These apply to all analog channels.
scale = 1.25 / sample
offset = 0
# XBee series 2 uses two calibration voltages on AN1 and AN2
elif self.device_type == XBeeSeries2 or self.device_type == XBeeZB:
if digihw.get_channel_type(0) != Analog or digihw.get_channel_type(
1) != Analog:
raise ValueError, "No analog input channels"
# Configure channels 0 and 1 as analog inputs
self.XBeeCommandSet(input_lines[0], 2)
self.XBeeCommandSet(input_lines[1], 2)
# Enable calibration voltages on channels 0 and 1
self.XBeeCommandSet("p2", 4)
self.XBeeCommandSet("d4", 4)
time.sleep(0.010)
# Read calibration samples
result = self.XBeeCommandGet("is")
data = parseIS(result)
sample = [data["AI0"], data["AI1"]]
if debug:
print "calibration samples are %d, %d" % (sample[0], sample[1])
# Return channels to operating mode
self.XBeeCommandSet("p2", 5)
self.XBeeCommandSet("d4", 5)
time.sleep(0.010)
if sample[0] == sample[1]:
raise ValueError, "Calibration error: equal samples"
scale1 = 511.5 / float(sample[1])
scale2 = 853.333 / float(sample[0])
scale = (scale1 + scale2) / 2.0
# Wasn't sure how to figure this out...
offset = 0
else:
raise ValueError, "XBee does not support analog inputs"
if debug:
print "scale is %f, offset is %f" % (scale, offset)
