Allow booting with no sensors attached

main.py

@@ -11,6 +11,7 @@ from net import templates
 from net import util
 from net.config import config
 from sensors import MCP9808
+from sensors import SimulatedMCP9808
 from sensors import WaterSensor
 
 
@@ -18,8 +19,13 @@ class SensorServer(Server):
 
     def __init__(self):
         super().__init__()
-        self.waterSensor = WaterSensor(0)
+
+        try:
             self.mcp = MCP9808(I2C(0))
+        except:
+            self.mcp = SimulatedMCP9808(temperature=37)
+
+        self.waterSensor = WaterSensor(0)
         self.aio = AdafruitIO()
         self.ntfy = Ntfy()
         self.ntp_interval_in_seconds = 60 * 60

sensors/__init__.py

@@ -1,2 +1,3 @@
 from .mcp9808 import MCP9808
+from .mcp9808 import SimulatedMCP9808
 from .watersensor import WaterSensor

sensors/mcp9808.py

@@ -251,3 +251,12 @@ class MCP9808(object):
             part = 0 if i > 7 else 1
             value = 1 if (cfg[part] & (2**(i % 8))) > 0 else 0
             print(meanings[i][0] + ": " + meanings[i][1 + value])
+
+
+class SimulatedMCP9808():
+
+    def __init__(self, temperature):
+        self.temperature = temperature
+
+    def get_temp(self):
+        return self.temperature