add dtc codes, wip

app_obd.py

@@ -95,6 +95,21 @@ def obd_rpm():
                     socketio.emit('obd_speed', response.value.to("kph"))
     finally:
         obd_rpm_lock.release()
+    
+def obd_dtc():
+    obd_speed_lock.acquire()
+    cmd = obd.commands.GET_DTC  # select an OBD command (sensor)
+    response = connection.query(cmd)  # send the command and parse the response
+    try:
+            if response.is_null():
+                    error_txt = "No data received."
+                    print(error_txt)
+                    socketio.emit('obd_dtc', error_txt)
+            else:   
+                    print(response.value) 
+                    socketio.emit('obd_dtc', response.value)
+    finally:
+        obd_rpm_lock.release()
 
 def kill_obd(obd_type):
     if obd_type == "speed":