def stromstaerke():
read_arduino.read()
Measure0 = float(globvar.measure0)
stromstaerkeSpan = Measure0 * 4.86 / 1023 #umwandeln von 8 bit in spannungswert
stromstaerke = stromstaerkeSpan / 10 #ohm
return stromstaerke
def testCorrectResult(self, mock_Serial):
"""
Checks the correct parsing of the result
"""
target = unittest.mock.MagicMock()
mock_Serial.return_value = target
target.readline.side_effect = [b'123 456 789 876 543 0 333 1023']
read_arduino.read()
self.assertEqual(123, globvar.measure0)
def spannung(): read_arduino.read() Measure0=globvar.measure0 spannung=Measure0*4.86/1023 #umwandeln von 8 bit in spannungswert return spannung
def testNoEndlessLoop(self, mock_Serial):
"""
The read must not yield into an endless loop. After several retries a ValueError will be thrown
"""
target = unittest.mock.MagicMock()
mock_Serial.return_value = target
target.readline.return_value = b'123 456' # a shortened result should give a retry
with self.assertRaises(
ValueError
): # a value error should be raised after several tries
read_arduino.read()
def testCorruptedResult(self, mock_Serial):
"""
Checks that a measurement is retried when garbaged data is read
"""
target = unittest.mock.MagicMock()
mock_Serial.return_value = target
target.readline.side_effect = [
b'123 4\x136 789 876 543 0 333 1023',
b'321 456 789 876 543 0 333 1023'
]
read_arduino.read()
self.assertEqual(321, globvar.measure0)
def leistung():
read_arduino.read() #Empfangen der Daten
Measure0 = globvar.measure0 #importieren der Daten
spannung = Measure0 * 4.86 / 1023 #8 bit in spannungswert
Measure1 = globvar.measure1 #für die Leistung 2 werte messen
stromstaerkeSpan = Measure1 * 4.86 / 1023 #8 bit in spannung
stromstaerke = stromstaerkeSpan / 10 #I=U/R
leistung = spannung * stromstaerke
return leistung #Ausgabe der Leistung
def widerstand():
read_arduino.read()
Measure0 = float(globvar.measure0)
if Measure0 == 0:
widerstand = "messfehler"
else:
widerstandREF = 1100
widerstandSPAN = Measure0 * 4.86 / 1023 #umwandeln von 8 bit in spannungswert
#anwenden von u/(r1+r2)= u2/r2 umgewandelt zu r1=((u*r2)/u2)-r2
widerstandZS1 = 5 * widerstandREF
widerstandZS2 = widerstandZS1 / widerstandSPAN
widerstand = widerstandZS2 - widerstandREF
return widerstand
def temperatur():
read_arduino.read()
#Berechnung des Widerstandswert vom NTC
tempOhmREF = 1100
Measure0 = float(globvar.measure0)
tempSPAN = Measure0 * 4.86 / 1023 #umwandeln von 8 bit in spannungswert
#anwenden von u/(r1+r2)= u2/r2 umgewandelt zu r1=((u*r2)/u2)-r2
tempZS1 = 5 * tempOhmREF
tempZS2 = tempZS1 / tempSPAN
tempNTCohm = tempZS2 - tempOhmREF
##tempNTCohm=10000
#Berechnung der Temperatur anhand von widerstand + ntc Eigenschaften
ntczs1 = tempNTCohm / 10000
ntczs2 = math.log10(ntczs1)
ntczs3 = ntczs2 * 0.0002911208151382824
ntczs4 = ntczs3 + 0.0033540164346805303
TempKelvin = 1 / ntczs4
Temperatur = TempKelvin - 273.15 #umwandeln in Celsius
return Temperatur