diff -urN jenprog-1.0/con_serial.py jenprog-1.0_jn-5148/con_serial.py
--- jenprog-1.0/con_serial.py	2009-04-02 23:02:51.000000000 +0200
+++ jenprog-1.0_jn-5148/con_serial.py	2009-10-16 16:51:18.000000000 +0200
@@ -5,8 +5,8 @@
 
 class SerialBootloader(JennicProtocol):
     def __init__(self, devname):
-        self.DEFAULT_TIMEOUT = .1
-        self.MAX_TIMEOUT     = 2
+        self.DEFAULT_TIMEOUT = .2   # was .1
+        self.MAX_TIMEOUT     = 4    # was 2
         if devname==None: devname='/dev/ttyUSB0'
         self.ser = Serial(devname, 38400, timeout=.1, parity=PARITY_NONE,
                            stopbits=1, bytesize=8, rtscts=1, dsrdtr=0)
diff -urN jenprog-1.0/flashutils.py jenprog-1.0_jn-5148/flashutils.py
--- jenprog-1.0/flashutils.py	2009-04-02 23:02:52.000000000 +0200
+++ jenprog-1.0_jn-5148/flashutils.py	2009-10-16 15:55:39.000000000 +0200
@@ -11,7 +11,7 @@
 
     def select_flash(self):
         self.identify_flash()
-        assert self.flash_jennicid in (0x00, 0x01, 0x02), "unsupported flash type"
+        assert self.flash_jennicid in (0x00, 0x01, 0x02, 0x03), "unsupported flash type"
         status = self.talk(0x2C, 0x2D, data = [self.flash_jennicid])[0]
         assert status == 0, "could not select detected flash type was: %d"%status
 
@@ -35,6 +35,10 @@
             self.flash_manufacturer = "Atmel"
             self.flash_type         = "25F512"
             self.flash_jennicid     = 0x02
+        elif self.flash_manufacturer == 0x12 and self.flash_type == 0x12:
+            self.flash_manufacturer = "ST"
+            self.flash_type         = "M25P40"
+            self.flash_jennicid     = 0x03
         else:
             self.flash_manufacturer = "unknown"
             self.flash_type         = "unknown"