1 files changed, 20 insertions, 8 deletions
diff --git a/moisture.py b/moisture.py
index c393905..31a683e 100644
--- a/moisture.py
+++ b/moisture.py
@@ -1,15 +1,27 @@
 #!/usr/bin/python3
-
+"""Reading moisture data from MCP3008."""
 import time
 
-import RPi.GPIO as GPIO
+import Adafruit_GPIO.SPI as SPI
+import Adafruit_MCP3008
 
-moisture_pin = 21
+# Make sure the spi are available `lsmod`
+SPI_PORT   = 0
+SPI_DEVICE = 0
+mcp = Adafruit_MCP3008.MCP3008(spi=SPI.SpiDev(SPI_PORT, SPI_DEVICE))
 
-GPIO.setmode(GPIO.BCM)
-GPIO.setup(moisture_pin, GPIO.IN)
+print('Reading MCP3008 values, press Ctrl-C to quit...')
+# Print nice channel column headers.
+print('| {0:>4} | {1:>4} | {2:>4} | {3:>4} | {4:>4} | {5:>4} | {6:>4} | {7:>4} |'.format(*range(8)))
+print('-' * 57)
 
 while True:
-        print(GPIO.input(moisture_pin))
-            time.sleep(1)
-
+    # Read all the ADC channel values in a list.
+    values = [0]*8
+    for i in range(8):
+        # The read_adc function will get the value of the specified channel (0-7).
+        values[i] = mcp.read_adc(i)
+    # Print the ADC values.
+    print('| {0:>4} | {1:>4} | {2:>4} | {3:>4} | {4:>4} | {5:>4} | {6:>4} | {7:>4} |'.format(*values))
+    # Pause for half a second.
+    time.sleep(0.5)