start

README.md

@@ -0,0 +1 @@
+# raspool

api.py

@@ -0,0 +1,16 @@
+from fastapi import FastAPI
+from main import read_temp_water
+#from main import read_ph
+import uvicorn
+app = FastAPI()
+
+@app.get("/get_water_temp")
+async def read_root():
+    return {"Message": read_temp_water()}
+
+#@app.get("/get_ph")
+#async def read_root():
+#    return {"Message": read_ph()}
+
+if(__name__ == "__main__"):
+   uvicorn.run(app, host='0.0.0.0', port=8000)

calibrate.py

@@ -0,0 +1,53 @@
+#!/usr/bin/python
+''' Raspberry Pi, ADS1115, PH4502C Calibration '''
+import board
+import busio
+import time
+import sys
+
+import adafruit_ads1x15.ads1115 as ADS
+from adafruit_ads1x15.analog_in import AnalogIn
+
+# Setup 
+i2c = busio.I2C(board.SCL, board.SDA)
+ads = ADS.ADS1115(i2c)
+
+def read_voltage(channel):
+    while True:
+        buf = list()
+        
+        for i in range(10): # Take 10 samples
+            buf.append(channel.voltage)
+        buf.sort() # Sort samples and discard highest and lowest
+        buf = buf[2:-2]
+        avg = (sum(map(float,buf))/6) # Get average value from remaining 6
+
+        print(round(avg,2),'V')
+        time.sleep(2)
+
+if __name__ == '__main__':
+    print('\n\n\n')
+    print('---- RPi-ADS115-PH4502 Calibration ----')
+    input('Press Enter once you have grounded the BNC connector...')
+    channel = None
+    while channel not in [0,1,2,3]:
+        try: 
+            channel = int(input('ADS1115 channel 0-3: '))  # ADS.P0, ADS.P1, ADS.P2, ADS.P3
+        except:
+            print('Not a valid option. Try again.')
+    if channel == 0:
+        channel = AnalogIn(ads, ADS.P0)
+    elif channel == 1:
+        channel = AnalogIn(ads, ADS.P1)
+    elif channel == 2:
+        channel = AnalogIn(ads, ADS.P1)
+    elif channel == 3:
+        channel = AnalogIn(ads, ADS.P1)
+    else:
+        sys.exit('Error selecting an ADS1115 pin.')
+    print('Adjust potentiometer nearest to BNC socket to ~2.50V')
+    print('Starting readings. Press CTRL+C to stop...')
+    try:
+        read_voltage(channel)
+    except KeyboardInterrupt:
+        pass

main.py

@@ -0,0 +1,31 @@
+import os, glob, time
+
+os.system('modprobe w1-gpio')
+os.system('modprobe w1-therm')
+ 
+base_dir = '/sys/bus/w1/devices/'
+device_folder = glob.glob(base_dir + '28*')[0]
+print(device_folder)
+#device_file = device_folder + "/"+ 'w1_bus_master1'
+#device_file = "/sys/bus/w1/devices/w1_bus_master1/28-000000bbd852"
+
+
+def read_temp_raw():
+    f = open(device_file, 'r')
+    lines = f.readlines()
+    f.close()
+    return lines
+ 
+def read_temp_water():
+    lines = read_temp_raw()
+    while lines[0].strip()[-3:] != 'YES':
+        time.sleep(0.2)
+        lines = read_temp_raw()
+    equals_pos = lines[1].find('t=')
+    if equals_pos != -1:
+        temp_string = lines[1][equals_pos+2:]
+        temp_c = float(temp_string) / 1000.0
+        return temp_c
+
+print(read_temp_water())
+

test.py

@@ -0,0 +1,18 @@
+import time
+import board
+import busio
+import adafruit_ads1x15.ads1115 as ADS
+from adafruit_ads1x15.analog_in import AnalogIn
+
+
+i2c = busio.I2C(board.SCL, board.SDA)
+
+# Create the ADS object and specify the gain
+ads = ADS.ADS1115(i2c)
+ads.gain = 1 
+chan = AnalogIn(ads, ADS.P0)
+
+# Continuously print the values
+while True:
+    print(f"MQ-135 Voltage: {chan.voltage}V")
+    time.sleep(1)