diff --git a/hydrobot_def.json b/hydrobot_def.json
--- a/hydrobot_def.json
+++ b/hydrobot_def.json
@@ -10,14 +10,52 @@
             "id" : "0x01",
             "name" : "airsense",
             "display" : "AirSense",
-            "class" : "AirSenseModule"
+            "class" : "AirSenseModule",
+            "sensors" : [
+                {
+                    "name" : "temp",
+                    "type" : "input",
+                    "sensor_num" : "0",
+                    "functions" : [
+                        "air_temp"
+                    ]
+                    
+                },
+                {
+                    "name" : "humidity",
+                    "type" : "input",
+                    "sensor_num" : "0",
+                    "functions" : [
+                        "air_humidity"
+                    ]
+                    
+                },
+                {
+                    "name" : "pressure",
+                    "type" : "input",
+                    "sensor_num" : "0",
+                    "functions" : [
+                        "air_pressure"
+                    ]
+                    
+                },
+                {
+                    "name" : "light",
+                    "type" : "input",
+                    "sensor_num" : "0",
+                    "functions" : [
+                        "ambient_light"
+                    ]
+                    
+                }
+            ]
         },
         {
             "id" : "0x02",
             "name" : "relaydrive",
             "display" : "RelayDrive",
             "class" : "RelayDriveModule",
-            "io" : [
+            "sensors" : [
                 {
                     "name" : "input_1",
                     "type" : "input",
@@ -89,6 +127,78 @@
                         "digital_in",
                         "freq_in"
                     ]
+                },
+                {
+                    "name" : "output_1",
+                    "type" : "output",
+                    "sensor_num" : "1",
+                    "functions" : [
+                        "digital_out",
+                        "pwm_out"
+                    ]
+                },
+                {
+                    "name" : "output_2",
+                    "type" : "output",
+                    "sensor_num" : "2",
+                    "functions" : [
+                        "digital_out",
+                        "pwm_out"
+                    ]
+                },
+                {
+                    "name" : "output_3",
+                    "type" : "output",
+                    "sensor_num" : "3",
+                    "functions" : [
+                        "digital_out",
+                        "pwm_out"
+                    ]
+                },
+                {
+                    "name" : "output_4",
+                    "type" : "output",
+                    "sensor_num" : "4",
+                    "functions" : [
+                        "digital_out",
+                        "pwm_out"
+                    ]
+                },
+                {
+                    "name" : "output_5",
+                    "type" : "output",
+                    "sensor_num" : "5",
+                    "functions" : [
+                        "digital_out",
+                        "pwm_out"
+                    ]
+                },
+                {
+                    "name" : "output_6",
+                    "type" : "output",
+                    "sensor_num" : "6",
+                    "functions" : [
+                        "digital_out",
+                        "pwm_out"
+                    ]
+                },
+                {
+                    "name" : "output_7",
+                    "type" : "output",
+                    "sensor_num" : "7",
+                    "functions" : [
+                        "digital_out",
+                        "pwm_out"
+                    ]
+                },
+                {
+                    "name" : "output_8",
+                    "type" : "output",
+                    "sensor_num" : "8",
+                    "functions" : [
+                        "digital_out",
+                        "pwm_out"
+                    ]
                 }
             ]
         },
@@ -96,7 +206,27 @@
             "id" : "0x03",
             "name" : "watersense",
             "display" : "WaterSense",
-            "class" : "WaterSenseModule"
+            "class" : "WaterSenseModule",
+            "sensors" : [
+                {
+                    "name" : "temp",
+                    "type" : "input",
+                    "sensor_num" : "0",
+                    "functions" : [
+                        "water_temp"
+                    ]
+                    
+                },
+                {
+                    "name" : "level",
+                    "type" : "input",
+                    "sensor_num" : "0",
+                    "functions" : [
+                        "water_level"
+                    ]
+                    
+                }
+            ]
         },
         {
             "id" : "0x04",