def __init__(self, serialport, romcode=''):
'''
temperaturesensor_MAXIM.__init__( serialport , romcode)
Initialize TEMPERATURESENSOR object (MAXIM), configure serial port / 1-wire bus for connection to DS18B20 temperature sensor chip
INPUT:
serialport: device name of the serial port for 1-wire connection to the temperature sensor, e.g. serialport = '/dev/ttyUSB3'
romcode: ROM code of the temperature sensor chip (you can find the ROM code using the digitemp program or using the pydigitemp package). If there is only a single temperature sensor connected to the 1-wire bus on the given serial port, romcode can be left empty.
OUTPUT:
(none)
'''
try:
# configure 1-wire bus for communication with MAXIM temperature sensor chip
r = AddressableDevice(
UART_Adapter(serialport)).get_connected_ROMs()
if r is None:
logger.error('Couldn not find any 1-wire devices on ' +
serialport)
else:
bus = UART_Adapter(serialport)
if romcode == '':
if len(r) == 1:
self._sensor = DS18B20(bus)
self._ROMcode = r[0]
else:
logger.error(
'Too many 1-wire devices to choose from! Try again with specific ROM code...'
)
for i in range(1, len(r)):
logger.info('Device ' + i + ' ROM code: ' +
r[i - 1] + '\n')
else:
self._sensor = DS18B20(bus, rom=romcode)
self._ROMcode = romcode
self._UART_locked = False
if not hasattr(self, '_sensor'):
self.warning(
'Could not initialize MAXIM DS1820 temperature sensor.')
except:
self.error(
'An error occured during configuration of the temperature sensor at serial interface '
+ serialport + '. The temperature sensor cannot be used.')
from digitemp.master import UART_Adapter
bus = UART_Adapter('/dev/ttyS0')
for rom in bus.get_connected_ROMs():
print(rom)
bus.close()
def __init__(self,
dout_pin,
pd_sck_pin,
gain_channel_A=128,
select_channel='A',
tempsens_serialport='',
TZero=[1.0,0.0],
TRatio=0.0):
"""
Init a new instance of load cell (HX711+DS18B20)
INPUT:
dout_pin: GPIO pin at Raspberry Pi used for DOUT of HX711
pd_sck_pin: GPIO pin at Raspberry Pi used for SCK of HX711
gain_channel_A: gain setting for input channel A of HX711 (64 or 128, default: 128)
select_channel: HX711 input channel used to read the load cell (A or B, default: A)
tempsens_serialport (optional): serial port of the temperature sensor (Maxim DS18B20) used for temperature compensation of the load cell reading. If tempsens_serialport is empty, the r$
TZero and TRatio: coefficients used for temperature compensation (default: TZero=[1.0,0.0] and TRatio=0.0)
OUTPUT:
(none)
"""
# set up HX711 load cell sensor:
if (isinstance(dout_pin, int)):
if (isinstance(pd_sck_pin, int)):
self._pd_sck = pd_sck_pin
self._dout = dout_pin
else:
raise TypeError('pd_sck_pin must be type int. '
'Received pd_sck_pin: {}'.format(pd_sck_pin))
else:
raise TypeError('dout_pin must be type int. '
'Received dout_pin: {}'.format(dout_pin))
self._gain_channel_A = 0
self._offset_A_128 = 0 # offset for channel A and gain 128
self._offset_A_64 = 0 # offset for channel A and gain 64
self._offset_B = 0 # offset for channel B
self._last_raw_data_A_128 = 0
self._last_raw_data_A_64 = 0
self._last_raw_data_B = 0
self._wanted_channel = ''
self._current_channel = ''
self._scale_ratio_A_128 = 1 # scale ratio for channel A and gain 128
self._scale_ratio_A_64 = 1 # scale ratio for channel A and gain 64
self._scale_ratio_B = 1 # scale ratio for channel B
self._debug_mode = False
self._data_filter = outliers_filter # default it is used outliers_filter
GPIO.setup(self._pd_sck, GPIO.OUT) # pin _pd_sck is output only
GPIO.setup(self._dout, GPIO.IN) # pin _dout is input only
self.select_channel(select_channel)
self.set_gain_A(gain_channel_A)
# set up DS18B20 temperature sensor (optional):
self._T0 = None
self._TZero = TZero
self._TRatio = TRatio
if tempsens_serialport:
from digitemp.master import UART_Adapter
from digitemp.device import AddressableDevice
from digitemp.device import DS18B20
r = AddressableDevice(UART_Adapter(tempsens_serialport)).get_connected_ROMs()
if r is None:
print ('Couldn not find any 1-wire devices on ' + serialport)
else:
bus = UART_Adapter(tempsens_serialport)
if len(r) == 1:
self._T_sensor = DS18B20(bus)
self._T_ROMcode = r[0]
else:
print ('Too many 1-wire devices to choose from! Try again with specific ROM code...')
for i in range(1,len(r)):
print ('Device ' + i + ' ROM code: ' + r[i-1] +'\n')
if hasattr(self,'_T_sensor'):
print ('Successfully configured DS18B20 temperature sensor (ROM code ' + self._T_ROMcode + ')' )
else:
self.warning('Could not initialize MAXIM DS1820 temperature sensor.')
def __init__(self,
serialport,
romcode='',
label='TEMPERATURESENSOR',
plot_title=None,
max_buffer_points=500,
fig_w=6.5,
fig_h=5,
has_plot_window=True,
has_external_plot_window=None):
'''
temperaturesensor_MAXIM.__init__( serialport , romcode, label = 'TEMPERATURESENSOR' , plot_title = None , max_buffer_points = 500 , fig_w = 6.5 , fig_h = 5 , has_plot_window = True , has_external_plot_window = None )
Initialize TEMPERATURESENSOR object (MAXIM), configure serial port / 1-wire bus for connection to DS18B20 temperature sensor chip
INPUT:
serialport: device name of the serial port for 1-wire connection to the temperature sensor, e.g. serialport = '/dev/ttyUSB3'
romcode: ROM code of the temperature sensor chip (you can find the ROM code using the digitemp program or using the pydigitemp package). If there is only a single temperature sensor connected to the 1-wire bus on the given serial port, romcode can be left empty.
label (optional): label / name of the TEMPERATURESENSOR object (string) for data output. Default: label = 'TEMPERATURESENSOR'
plot_title (optional): title string for use in plot window. If plot_title = None, the sensor label is used. Default: label = None
max_buffer_points (optional): max. number of data points in the PEAKS buffer. Once this limit is reached, old data points will be removed from the buffer. Default value: max_buffer_points = 500
fig_w, fig_h (optional): width and height of figure window used to plot data (inches)
has_external_plot_window (optional): flag to indicate if there is a GUI system that handles the plotting of the data buffer on its own. This flag can be set explicitly to True of False, or can use None to ask for automatic 'on the fly' check if the has_external_plot_window = True or False should be used. Default: has_external_plot_window = None
OUTPUT:
(none)
'''
self._label = label
# Check for has_external_plot_window flag:
if has_external_plot_window is None:
has_external_plot_window = misc.have_external_gui()
# Check plot title:
if plot_title == None:
self._plot_title = self._label
else:
self._plot_title = plot_title
# data buffer for temperature values:
self._tempbuffer_t = numpy.array([])
self._tempbuffer_T = numpy.array([])
self._tempbuffer_unit = ['x'] * 0 # empty list
self._tempbuffer_max_len = max_buffer_points
self._tempbuffer_lastupdate_timestamp = -1
# set up plotting environment
if has_external_plot_window:
# no need to set up plotting
self._has_external_display = True
self._has_display = False
else:
self._has_external_display = False
self._has_display = misc.plotting_setup(
) # check for graphical environment, import matplotlib
try:
# configure 1-wire bus for communication with MAXIM temperature sensor chip
r = AddressableDevice(
UART_Adapter(serialport)).get_connected_ROMs()
if r is None:
print('Couldn not find any 1-wire devices on ' + serialport)
else:
bus = UART_Adapter(serialport)
if romcode == '':
if len(r) == 1:
# print ('Using 1-wire device ' + r[0] + '\n')
self._sensor = DS18B20(bus)
self._ROMcode = r[0]
else:
print(
'Too many 1-wire devices to choose from! Try again with specific ROM code...'
)
for i in range(1, len(r)):
print('Device ' + i + ' ROM code: ' + r[i - 1] +
'\n')
else:
self._sensor = DS18B20(bus, rom=romcode)
self._ROMcode = romcode
self._UART_locked = False
if self._has_display: # prepare plotting environment and figure
import matplotlib.pyplot as plt
# set up plotting environment
self._fig = plt.figure(figsize=(fig_w, fig_h))
t = 'MAXIM DS1820'
if self._plot_title:
t = t + ' (' + self._plot_title + ')'
self._fig.canvas.set_window_title(t)
# set up panel for temperature history plot:
self._tempbuffer_ax = plt.subplot(1, 1, 1)
t = 'TEMPBUFFER'
if self._plot_title:
t = t + ' (' + self._plot_title + ')'
self._tempbuffer_ax.set_title(t, loc="center")
self._tempbuffer_ax.set_xlabel('Time (s)')
self._tempbuffer_ax.set_ylabel('Temperature')
# add (empty) line to plot (will be updated with data later):
self._tempbuffer_ax.plot([], [], 'ko-', markersize=10)
# get some space in between panels to avoid overlapping labels / titles
self._fig.tight_layout()
# enable interactive mode:
plt.ion()
self._figwindow_is_shown = False
if hasattr(self, '_sensor'):
print(
'Successfully configured DS18B20 temperature sensor (ROM code '
+ self._ROMcode + ')')
else:
self.warning(
'Could not initialize MAXIM DS1820 temperature sensor.')
except:
# print ( '\n**** WARNING: An error occured during configuration of the temperature sensor at serial interface ' + serialport + '. The temperature sensor cannot be used.\n' )
self.warning(
'An error occured during configuration of the temperature sensor at serial interface '
+ serialport + '. The temperature sensor cannot be used.')
#
import time
from digitemp.master import UART_Adapter
from digitemp.device import TemperatureSensor
from digitemp.exceptions import DeviceError, AdapterError
bus = None
device = "/dev/ttyS0"
sensID = "10A75CA80208001A"
# infinite device loop
while True:
try:
time.sleep(3)
print(f"Connecting to '{device}'...")
bus = UART_Adapter(device)
print("Connected to '%s'..." % device)
sensor = TemperatureSensor(bus, rom=sensID)
# infinite reading loop
while True:
try:
temp = sensor.get_temperature()
print(f"{temp}ºC")
except AdapterError:
print("U")
time.sleep(3)
except AssertionError:
bus.close()
bus = None
p2.communicate()
def read_cpu_temperature():
try:
region0_temperature = subprocess.check_output(
["cat", "/etc/armbianmonitor/datasources/soctemp"])
return float(region0_temperature)
except:
return float(-1)
if __name__ == '__main__':
start = timer()
bus = UART_Adapter('/dev/ttyUSB0')
stats = StatsClient('statsd', 8125, 'readtemp')
try:
with open('/boot/id.txt', 'r') as f:
sensor_id = f.readline().strip()
except:
sensor_id = 'unknown'
stats.gauge('online.%s' % sensor_id, 1)
led_toggle(1)
for rom in get_roms():
read_temperature(rom)
led_toggle(0)
elapsed_time = timer() - start
stats.timing('runtime.%s.elapsed' % sensor_id, int(1000 * elapsed_time))
def __init__( self , serialport , romcode = '', label = 'TEMPERATURESENSOR' , max_buffer_points = 500 , fig_w = 6.5 , fig_h = 5):
'''
temperaturesensor_MAXIM.__init__( serialport , romcode, label = 'TEMPERATURESENSOR' , max_buffer_points = 500 , fig_w = 6.5 , fig_h = 5 )
Initialize TEMPERATURESENSOR object (MAXIM), configure serial port / 1-wire bus for connection to DS18B20 temperature sensor chip
INPUT:
serialport: device name of the serial port for 1-wire connection to the temperature sensor, e.g. serialport = '/dev/ttyUSB3'
romcode: ROM code of the temperature sensor chip (you can find the ROM code using the digitemp program or using the pydigitemp package). If there is only a single temperature sensor connected to the 1-wire bus on the given serial port, romcode can be left empty.
label (optional): label / name of the TEMPERATURESENSOR object (string). Default: label = 'TEMPERATURESENSOR'
max_buffer_points (optional): max. number of data points in the PEAKS buffer. Once this limit is reached, old data points will be removed from the buffer. Default value: max_buffer_points = 500
fig_w, fig_h (optional): width and height of figure window used to plot data (inches)
OUTPUT:
(none)
'''
# configure 1-wire bus for communication with MAXIM temperature sensor chip
r = AddressableDevice(UART_Adapter(serialport)).get_connected_ROMs()
if r is None:
print ( 'Couldn not find any 1-wire devices on ' + serialport )
else:
bus = UART_Adapter(serialport)
if romcode == '':
if len(r) == 1:
# print ('Using 1-wire device ' + r[0] + '\n')
self._sensor = DS18B20(bus)
self._ROMcode = r[0]
else:
print ( 'Too many 1-wire devices to choose from! Try again with specific ROM code...' )
for i in range(1,len(r)):
print ( 'Device ' + i + ' ROM code: ' + r[i-1] +'\n' )
else:
self._sensor = DS18B20(bus, rom=romcode)
self._ROMcode = romcode
self._label = label
# data buffer for temperature values:
self._tempbuffer_t = numpy.array([])
self._tempbuffer_T = numpy.array([])
self._tempbuffer_unit = ['x'] * 0 # empty list
self._tempbuffer_max_len = max_buffer_points
# set up plotting environment
self._has_display = havedisplay
if self._has_display: # prepare plotting environment and figure
# set up plotting environment
self._fig = plt.figure(figsize=(fig_w,fig_h))
t = 'MAXIM DS1820'
if self._label:
t = t + ' (' + self.label() + ')'
self._fig.canvas.set_window_title(t)
# set up panel for temperature history plot:
self._tempbuffer_ax = plt.subplot(1,1,1)
self._tempbuffer_ax.set_title('TEMPBUFFER (' + self.label() + ')',loc="center")
self._tempbuffer_ax.set_xlabel('Time (s)')
self._tempbuffer_ax.set_ylabel('Temperature')
# add (empty) line to plot (will be updated with data later):
self._tempbuffer_ax.plot( [], [] , 'ko-' , markersize = 10 )
# get some space in between panels to avoid overlapping labels / titles
self._fig.tight_layout()
# enable interactive mode:
plt.ion()
self._figwindow_is_shown = False
if hasattr(self,'_sensor'):
print ( 'Successfully configured DS18B20 temperature sensor (ROM code ' + self._ROMcode + ')' )
else:
self.warning( 'Could not initialize MAXIM DS1820 temperature sensor.' )
import time
from digitemp.master import UART_Adapter
from digitemp.device import TemperatureSensor
from digitemp.exceptions import OneWireException
bus = UART_Adapter('/dev/ttyS0')
sensors = []
for rom in bus.get_connected_ROMs():
try:
sensors.append(TemperatureSensor(bus, rom))
except OneWireException:
pass
print(55 * "=")
for sensor in sensors:
sensor.info()
print(55 * "=")
# Instead of calling sensor.get_temperature() for each sensor we call bus.measure_temperature_all() once
# and then do sensor.read_temperature() for each sensor.
try:
while True:
measurements = []
bus.measure_temperature_all()
for sensor in sensors:
try:
measurements.append("%3.02fºC" % sensor.read_temperature())
except OneWireException:
measurements.append(" error")