13 files changed, 317 insertions, 0 deletions
diff --git a/Datasheets/BME280-datasheet.pdf b/Datasheets/BME280-datasheet.pdf
new file mode 100644
index 0000000..9bfdd17
--- /dev/null
+++ b/Datasheets/BME280-datasheet.pdf
diff --git a/Datasheets/SDS011-datasheet.pdf b/Datasheets/SDS011-datasheet.pdf
new file mode 100644
index 0000000..31448aa
--- /dev/null
+++ b/Datasheets/SDS011-datasheet.pdf
diff --git a/Datasheets/SEN15901-datasheet.pdf b/Datasheets/SEN15901-datasheet.pdf
new file mode 100644
index 0000000..1b5fee4
--- /dev/null
+++ b/Datasheets/SEN15901-datasheet.pdf
diff --git a/Datasheets/veml6075-datasheet.pdf b/Datasheets/veml6075-datasheet.pdf
new file mode 100644
index 0000000..c8b78d2
--- /dev/null
+++ b/Datasheets/veml6075-datasheet.pdf
diff --git a/dependencies.txt b/dependencies.txt
new file mode 100644
index 0000000..1611cd4
--- /dev/null
+++ b/dependencies.txt
@@ -0,0 +1,6 @@
+python3-smbus
+python3-gpiozero
+python3-rpi.gpio
+python3-bme280
+
+i2c kernel driver needs to be enabled on Pi
diff --git a/dev_scripts/bme280_sensor.py b/dev_scripts/bme280_sensor.py
new file mode 100644
index 0000000..c117a40
--- /dev/null
+++ b/dev_scripts/bme280_sensor.py
@@ -0,0 +1,26 @@
+import bme280
+from smbus import SMBus
+import time
+port = 1
+address = 0x76 # BME280 address
+bus = SMBus(port)
+bme280.load_calibration_params(bus,address)
+altitude = 97
+
+
+def bme280Read():
+    bme280_data = bme280.sample(bus,address)
+    humidity  = bme280_data.humidity
+    relPressure  = bme280_data.pressure
+    ambient_temperature = bme280_data.temperature
+    absPressure = relPressure + (altitude/8.3)
+    #print(humidity, pressure, ambient_temperature)
+    # TODO calculate air pressure at sea level
+    return bme280_data.humidity, bme280_data.pressure, bme280_data.temperature, absPressure
+
+# test loop
+"""
+while True:
+    bme280Read()
+    time.sleep(1)
+"""
diff --git a/dev_scripts/sds011.py b/dev_scripts/sds011.py
new file mode 100644
index 0000000..98abaa1
--- /dev/null
+++ b/dev_scripts/sds011.py
@@ -0,0 +1,21 @@
+#!/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)
diff --git a/dev_scripts/sen15901anem.py b/dev_scripts/sen15901anem.py
new file mode 100644
index 0000000..6294ea0
--- /dev/null
+++ b/dev_scripts/sen15901anem.py
@@ -0,0 +1,49 @@
+from gpiozero import Button
+import time
+import math
+import statistics
+
+anem = Button(5) # setup GPIO 5 as a button
+storeSpeeds = []
+windCount = 0 # counts half-rotations
+radius_cm = 9.0 # radius of anemometer
+circumference_cm = (2 * math.pi) * radius_cm
+windInterval = 5 # how often to report speed
+cmInKm = 100000.0
+secsInHour = 3600
+anemFactor = 1.18 # anemometer factor is the result of wind energy lost due to the arms turning
+
+# every half rotation, add one to count
+def spin():
+    global windCount
+    windCount += 1
+
+# calculate wind speed
+def calculateSpeed(timeSec):
+    global windCount
+    global circumference_cm
+    rotations = windCount / 2.0
+
+    # calculate distance travelled by anemometer in km
+    distKm = circumference_cm * rotations / cmInKm
+    speed = ((distKm / timeSec) * secsInHour) * anemFactor
+    return speed
+
+def resetWind():
+    global wind_count
+    wind_count = 0
+
+anem.when_pressed = spin
+
+# Loop to measure wind speed and report at 5 second intervals
+while True:
+    startTime = time.time()
+    while time.time() - startTime <= windInterval:
+        resetWind() # reset count for next 5 second run
+        time.sleep(windInterval)
+        #finalSpeed = calculateSpeed(windInterval)
+        storeSpeeds.append(calculate(windInterval)) # store average speed over 5 seconds
+
+    windGust = max(storeSpeeds) # maximum gust
+    windSpeed = statistics.mean(storeSpeeds) # running average wind speed
+    print(windSpeed, "km/h", windGust, "km/h")
diff --git a/dev_scripts/sen15901rain.py b/dev_scripts/sen15901rain.py
new file mode 100644
index 0000000..ed54189
--- /dev/null
+++ b/dev_scripts/sen15901rain.py
@@ -0,0 +1,26 @@
+from gpiozero import Button
+import time
+
+rainCount = 0
+bucketSize = 0.2794 # size of bucket in ml
+rain = Button(6) # setup GPIO 6 as a button
+
+# every tip add 1 to count
+def tipped():
+    global rainCount
+    rainCount +=1
+    print (rainCount * bucketSize)
+
+def resetRainfall():
+    global rainCount
+    rainCount = 0
+
+rain.when_pressed = tipped
+
+"""
+# test loop
+
+while True:
+    rain.when_pressed = tipped
+    time.sleep(1)
+"""
diff --git a/dev_scripts/sen15901vane.py b/dev_scripts/sen15901vane.py
new file mode 100644
index 0000000..7c02723
--- /dev/null
+++ b/dev_scripts/sen15901vane.py
@@ -0,0 +1,95 @@
+from gpiozero import MCP3008
+import time
+import math
+
+adc = MCP3008(channel=0)
+count = 0
+"""
+volts key pairs created with the below + known values from datasheet
+    # create voltage divider for use with MCP3008 ADC
+    def volt_div(r1, r2, vIn):
+        vOut = (vIn * r2)/(r1 + r2)
+        return round(vOut,3)
+
+    # calculate vOut values for each wind direction using known resistances from datasheet, 3.3 V from RPi and 4.7K ohm resistor
+
+    resistances = [33000, 6570, 8200, 891, 1000, 688, 2200, 1410, 390, 3140, 16000, 14120, 120000, 42120, 64900, 21880]
+
+    for i in range(len(resistances)):
+        print(resistances[i],volt_div(4700, resistances[i], 3.3))
+
+4.7K resistor
+volts = {0.4: "0.0 N",
+        1.4: "22.5 NNE",
+        1.2: "45.0 NE",
+        2.8: "67.5 ENE",
+        2.7: "90.0 E",
+        2.9: "112.5 ESE",
+        2.2: "135.0 SE",
+        2.5: "157.5 SSE",
+        1.8: "180.0 S",
+        2.0: "202.5 SSW",
+        0.7: "225.0 SW",
+        0.8: "247.5 WSW",
+        0.1: "270.0 W",
+        0.3: "292.5 WNW",
+        0.2: "315.0 NW",
+        0.6: "337.5 NNW"}
+"""
+# 5K resistor
+volts = {1.87: 0.0,
+        2.04: 22.5,
+        0.79: 45.0,
+        0.80: 45.0,
+        0.88: 67.5,
+        0.13: 90.0,
+        0.36: 112.5,
+        0.24: 135.0,
+        0.62: 157.5,
+        0.44: 180.0,
+        1.44: 202.5,
+        1.27: 225.0,
+        2.81: 247.5,
+        2.76: 270.0,
+        2.91: 292.5,
+        2.31: 315.0,
+        2.59: 337.5}
+
+def getAverage(angles):
+    sinSum = 0.0
+    cosSum = 0.0
+
+    for angle in angles:
+        r = math.radians(angle)
+        sinSum += math.sin(r)
+        cosSum += math.cos(r)
+
+    flen = float(len(angles))
+    s = sinSum / flen
+    c = cosSum / flen
+    arc = math.degrees(math.atan(s / c))
+    average = 0.0
+
+    if s > 0 and c > 0:
+        average = arc
+    elif c <0:
+        average = arc + 180
+    elif s < 0 and c > 0:
+        average = arc + 360
+
+    return 0.0 if average == 360 else average
+
+def getValue(length=5):
+    data = []
+    startTime = time.time()
+
+    while time.time() - startTime <= length:
+        wind = round(adc.value*3.3,2)
+        if not wind in volts: # keep only good measurements
+            print("Unknown value: " + str(wind))
+        else:
+            data.append(volts[wind])
+            
+    return getAverage(data)
+
+getValue()
diff --git a/dev_scripts/sen15901vanelive.py b/dev_scripts/sen15901vanelive.py
new file mode 100644
index 0000000..1c7c56e
--- /dev/null
+++ b/dev_scripts/sen15901vanelive.py
@@ -0,0 +1,31 @@
+from gpiozero import MCP3008
+import time
+import math
+
+adc = MCP3008(channel=0)
+count = 0
+
+# 5K resistor
+volts = {1.87: 0.0,
+        2.04: 22.5,
+        0.79: 45.0,
+        0.80: 45.0,
+        0.88: 67.5,
+        0.13: 90.0,
+        0.36: 112.5,
+        0.24: 135.0,
+        0.62: 157.5,
+        0.44: 180.0,
+        1.44: 202.5,
+        1.27: 225.0,
+        2.81: 247.5,
+        2.76: 270.0,
+        2.91: 292.5,
+        2.31: 315.0,
+        2.59: 337.5}
+
+
+while True:
+    wind = round(adc.value*3.3,2)
+    print(wind)
+    time.sleep(1)
diff --git a/dev_scripts/vane_values.py b/dev_scripts/vane_values.py
new file mode 100644
index 0000000..b6b6803
--- /dev/null
+++ b/dev_scripts/vane_values.py
@@ -0,0 +1,11 @@
+# create voltage divider for use with MCP3008 ADC
+def volt_div(r1, r2, vIn):
+    vOut = (vIn * r2)/(r1 + r2)
+    return round(vOut,3)
+
+# calculate vOut values for each wind direction using known resistances from datasheet, 3.3 V from RPi and 4.7K ohm resistor
+
+resistances = [33000, 6570, 8200, 891, 1000, 688, 2200, 1410, 390, 3140, 16000, 14120, 120000, 42120, 64900, 21880]
+
+for i in range(len(resistances)):
+  print(resistances[i],volt_div(5000, resistances[i], 3.3))
diff --git a/weather_station.py b/weather_station.py
new file mode 100644
index 0000000..986d6a5
--- /dev/null
+++ b/weather_station.py
@@ -0,0 +1,52 @@
+from gpiozero import Button
+import time
+import math
+import statistics
+import bme280_sensor
+import wind_direction_byo
+import ds18b20_therm
+
+anem = Button(5) # setup GPIO 5 as a button
+storeSpeeds = []
+windCount = 0 # counts half-rotations
+radius_cm = 9.0 # radius of anemometer
+circumference_cm = (2 * math.pi) * radius_cm
+windInterval = 5 # how often to report speed
+cmInKm = 100000.0
+secsInHour = 3600
+anemFactor = 1.18 # anemometer factor is the result of wind energy lost due to the arms turning
+
+# every half rotation, add one to count
+def spin():
+    global windCount
+    windCount += 1
+
+# calculate wind speed
+def calculateSpeed(timeSec):
+    global windCount
+    global circumference_cm
+    rotations = windCount / 2.0
+
+    # calculate distance travelled by anemometer in km
+    distKm = circumference_cm * rotations / cmInKm
+    speed = ((distKm / timeSec) * secsInHour) * anemFactor
+    return speed
+
+def resetWind():
+    global wind_count
+    wind_count = 0
+
+anem.when_pressed = spin
+
+# Loop to measure wind speed and report at 5 second intervals
+while True:
+    startTime = time.time()
+    while time.time() - startTime <= windInterval:
+        resetWind() # reset count for next 5 second run
+        time.sleep(windInterval)
+        #finalSpeed = calculateSpeed(windInterval)
+        storeSpeeds.append(calculate(windInterval)) # store average speed over 5 seconds
+
+    windGust = max(storeSpeeds) # maximum gust
+    windSpeed = statistics.mean(storeSpeeds) # running average wind speed
+    print(windSpeed, "km/h", windGust, "km/h")