Add relay drivers

rpiserver/relays.py

@@ -0,0 +1,41 @@
+import asyncio
+import RPi.GPIO as GPIO
+
+RELAY1 = 4
+RELAY2 = 22
+RELAY3 = 6
+RELAY4 = 26
+
+RELAY_ON = True
+RELAY_OFF = False
+
+RELAYS = [RELAY1, RELAY2, RELAY3, RELAY4]
+
+def set_relay(r, state):
+    GPIO.output(r, state)
+
+def all_off():
+    for r in RELAYS:
+        set_relay(r, RELAY_OFF)
+
+def init_relays():
+    GPIO.setmode(GPIO.BCM)
+    GPIO.setwarnings(False)
+
+    for r in RELAYS:
+        GPIO.setup(r, GPIO.OUT)
+
+    all_off()
+
+async def test():
+    for r in RELAYS:
+        set_relay(r, RELAY_ON)
+        await asyncio.sleep(0.5)
+        set_relay(r, RELAY_OFF)
+
+if __name__ == '__main__':
+    init_relays()
+
+    loop = asyncio.get_event_loop()
+    loop.run_until_complete(test())
+    loop.close()