Write simple thermostat

rpiserver/data.py

@@ -0,0 +1,4 @@
+PROBES = {
+    '0218404f8bff': 'Rad',
+    '0218405068ff': 'Tub',
+}

rpiserver/main.py

@@ -0,0 +1,55 @@
+import os
+import logging
+logging.basicConfig(
+        format='[%(asctime)s] %(levelname)s %(module)s/%(funcName)s - %(message)s',
+        level=logging.DEBUG if os.environ.get('DEBUG') else logging.INFO)
+#logging.getLogger('aiohttp').setLevel(logging.DEBUG if os.environ.get('DEBUG') else logging.WARNING)
+
+import asyncio
+from statistics import mean
+
+import w1therm
+import relays
+import data
+
+HI_SETPOINT = 40.0
+LO_SETPOINT = 30.0
+
+FAN_RELAY = relays.RELAY3
+
+async def main():
+    relays.init_relays()
+
+    while True:
+        try:
+            temps = await w1therm.get_temperatures()
+            if len(temps) != len(data.PROBES):
+                raise
+        except:
+            logging.error('Problem reading temperature probes! Setting fan on and sleeping.')
+            relays.set_relay(FAN_RELAY, relays.RELAY_ON)
+            await asyncio.sleep(60)
+            continue
+
+        temperature_log = []
+        for id_, temp in temps.items():
+            temperature_log.append('{}: {} C'.format(data.PROBES[id_], temp))
+        logging.info('Temperature probe ' + ', '.join(temperature_log))
+
+        temperature_list = list(temps.values())
+        temperature_mean = mean(temperature_list)
+
+        if temperature_mean > HI_SETPOINT:
+            logging.info('Turning fan on')
+            relays.set_relay(FAN_RELAY, relays.RELAY_ON)
+        elif temperature_mean < LO_SETPOINT:
+            logging.info('Turning fan off')
+            relays.set_relay(FAN_RELAY, relays.RELAY_OFF)
+
+        await asyncio.sleep(10)
+
+if __name__ == '__main__':
+    loop = asyncio.get_event_loop()
+    loop.run_until_complete(main())
+    loop.close()
+

rpiserver/relays.py

@@ -31,7 +31,7 @@ async def test():
     for r in RELAYS:
         set_relay(r, RELAY_ON)
         await asyncio.sleep(0.5)
-        set_relay(r, RELAY_OFF)
+        #set_relay(r, RELAY_OFF)
 
 if __name__ == '__main__':
     init_relays()