Switch temp comp method for #28

[EVA-2020-02-2.git] / examples / compensated-temperature.py

diff --git a/examples/compensated-temperature.py b/examples/compensated-temperature.py
index b572ad5127eddd247a858cfb805db4d996cae076..7d0d0f1bd565821c26cd8af7ee12813b001b3c0f 100755 (executable)
--- a/examples/compensated-temperature.py
+++ b/examples/compensated-temperature.py
@@ -2,16 +2,16 @@
 
 import time
 from bme280 import BME280
-from subprocess import PIPE, Popen
 
 try:
     from smbus2 import SMBus
 except ImportError:
     from smbus import SMBus
 
-print("""compensated-temperature.py - Use the CPU temperature to compensate temperature
-readings from the BME280 sensor. Method adapted from Initial State's Enviro pHAT
-review: https://medium.com/@InitialState/tutorial-review-enviro-phat-for-raspberry-pi-4cd6d8c63441
+print("""compensated-temperature.py - Use the CPU temperature
+to compensate temperature readings from the BME280 sensor.
+Method adapted from Initial State's Enviro pHAT review:
+https://medium.com/@InitialState/tutorial-review-enviro-phat-for-raspberry-pi-4cd6d8c63441
 
 Press Ctrl+C to exit!
 
@@ -20,11 +20,14 @@ Press Ctrl+C to exit!
 bus = SMBus(1)
 bme280 = BME280(i2c_dev=bus)
 
+
 # Get the temperature of the CPU for compensation
 def get_cpu_temperature():
-    process = Popen(['vcgencmd', 'measure_temp'], stdout=PIPE)
-    output, _error = process.communicate()
-    return float(output[output.index('=') + 1:output.rindex("'")])
+    with open("/sys/class/thermal/thermal_zone0/temp", "r") as f:
+        temp = f.read()
+        temp = int(temp) / 1000.0
+    return temp
+
 
 # Tuning factor for compensation. Decrease this number to adjust the
 # temperature down, and increase to adjust up