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1 files changed, 21 insertions, 0 deletions

diff --git a/dev_scripts/sds011.py b/dev_scripts/sds011.py
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+++ b/dev_scripts/sds011.py
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+#!/usr/bin/env python3
+
+import serial, time
+
+# SDS011 air quality sensor
+ser = serial.Serial('/dev/ttyUSB0')
+
+while True:
+    data = []
+    for index in range(0,10):
+        # read sensor
+        datum = ser.read()
+        data.append(datum)
+
+    # extract bits 2 and 3 for PM2.5 and divide by 10 to get micrograms per metre^3
+    pmTwoFive = int.from_bytes(b''.join(data[2:4]), byteorder='little') /10
+    # extract bits 4 and 5 for PM10 and divide by 10 to get micrograms per metre^3
+    pmTen = int.from_bytes(b''.join(data[4:6]), byteorder='little') /10
+    print(pmTwoFive)
+    print(pmTen)
+    time.sleep(10)