tab

server.js

@@ -60,7 +60,7 @@ http.listen(port, function () {
 
 // gpio
 gpio.on('change', function (channel, value) {
-    console.log(`Channel ${channel} value is now ${value} - ${(Math.random() * 100000)}`);
+    console.log(`Channel ${channel} value is now ${value} \t- ${(Math.random() * 100000)}`);
     if (channel === 7) {
         io.sockets.emit('call', 'press');
     } else if (channel === 37) {

src/pressure.py

@@ -0,0 +1,38 @@
+#!/usr/local/bin/python
+
+import RPi.GPIO as GPIO
+import time
+
+GPIO.setmode(GPIO.BCM)
+
+# define the pin that goes to the circuit
+pin_to_circuit = 4
+
+
+def rc_time(pin_to_circuit):
+    count = 0
+
+    # Output on the pin for
+    GPIO.setup(pin_to_circuit, GPIO.OUT)
+    GPIO.output(pin_to_circuit, GPIO.LOW)
+    time.sleep(0.1)
+
+    # Change the pin back to input
+    GPIO.setup(pin_to_circuit, GPIO.IN)
+
+    # Count until the pin goes high
+    while (GPIO.input(pin_to_circuit) == GPIO.LOW):
+        count += 1
+
+    return count
+
+
+# Catch when script is interrupted, cleanup correctly
+try:
+    # Main loop
+    while True:
+        print(rc_time(pin_to_circuit))
+except KeyboardInterrupt:
+    pass
+finally:
+    GPIO.cleanup()