diff --git a/src/app.py b/src/app.py
index d900310..688de40 100644
--- a/src/app.py
+++ b/src/app.py
@@ -1144,14 +1144,16 @@ def process_message_data(cursor, body):
                                     S=[0,0,0,0,0,0,0,0,0,0]
                                     for index in range(dp):
                                         lenn = 1
-                                        smell_index = struct.unpack('<b', decrypt_data[pointer:pointer+lenn])[0]
+                                        smell_index = struct.unpack('<B', decrypt_data[pointer:pointer+lenn])[0]
+                                        if index == 0:
+                                            message_type = smell_index
                                         pointer = pointer + lenn
                                         lenn = 4
                                         smell_value = struct.unpack('<f', decrypt_data[pointer:pointer+lenn])[0]
                                         pointer = pointer + lenn
                                         #logging.info("I:"+str(smell_index))
                                         #logging.info("S:"+str(smell_value))
-                                        S[smell_index] = smell_value
+                                        S[smell_index - message_type] = smell_value
                                     #work_dict['pressure_r'] = reason
                                     new_message_dict["smell"] = S
                                 elif message_type == 1: #pressure event