diff --git a/buildhat/serinterface.py b/buildhat/serinterface.py
index 55a1d87..42747a2 100644
--- a/buildhat/serinterface.py
+++ b/buildhat/serinterface.py
@@ -31,6 +31,7 @@ def cmp(str1, str2):
 
 class BuildHAT:
     CONNECTED=": connected to active ID"
+    CONNECTEDPASSIVE=": connected to passive ID"
     DISCONNECTED=": disconnected"
     DEVTIMEOUT=": timeout during data phase: disconnecting"
     NOTCONNECTED=": no device detected"
@@ -89,7 +90,7 @@ def __init__(self, firmware, signature, version):
                 else:
                     self.write(b"version\r")
         # Use to force hat reset
-        #self.state = HatState.NEEDNEWFIRMWARE
+        self.state = HatState.NEEDNEWFIRMWARE
         if self.state == HatState.NEEDNEWFIRMWARE:
             self.resethat()
             self.loadfirmware(firmware, signature)
@@ -200,11 +201,14 @@ def callbackloop(self, q):
             q.task_done()
 
     def loop(self, cond, uselist, q):
+        tmp = open("/tmp/serial.txt", "a")
         count = 0
         while self.running:
             line = b""
             try:
                 line = self.ser.readline().decode('utf-8', 'ignore')
+                print(line, file=tmp, end='')
+                tmp.flush()
             except serial.SerialException:
                 pass
             if len(line) == 0:
@@ -219,6 +223,11 @@ def loop(self, cond, uselist, q):
                         self.write("port {} ; on\r".format(portid).encode())
                     if uselist:
                         count += 1
+                elif cmp(msg, BuildHAT.CONNECTEDPASSIVE):
+                    typeid = int(line[2+len(BuildHAT.CONNECTEDPASSIVE):],16)
+                    self.connections[portid].update(typeid, True)
+                    if uselist:
+                        count += 1
                 elif cmp(msg, BuildHAT.DISCONNECTED):
                     self.connections[portid].update(-1, False)
                 elif cmp(msg, BuildHAT.DEVTIMEOUT):
diff --git a/test/loadingtest.py b/test/loadingtest.py
new file mode 100755
index 0000000..04c0710
--- /dev/null
+++ b/test/loadingtest.py
@@ -0,0 +1,14 @@
+#!/usr/bin/python3
+
+import datetime
+from buildhat import Hat
+
+try:
+    print("{} Starting".format(datetime.datetime.now().strftime("%H:%M:%S")))
+    h = Hat()
+    print(h.get())
+    print("Fin")
+except Exception as err:
+    print(err)
+    with open('/tmp/test', 'w'): 
+        pass
diff --git a/test/loadingtest.sh b/test/loadingtest.sh
new file mode 100755
index 0000000..e80eb8e
--- /dev/null
+++ b/test/loadingtest.sh
@@ -0,0 +1,17 @@
+#!/bin/bash
+
+rm "/tmp/test"
+
+while [[ 1 ]];
+do
+	rm /tmp/serial.txt
+
+	./loadingtest.py
+		
+	if [ -f "/tmp/test" ]; then
+		break
+	fi
+	sleep 1
+done
+
+cat /tmp/serial.txt