diff --git a/validitysensor/flash.py b/validitysensor/flash.py
index 54c5240..5874ac2 100644
--- a/validitysensor/flash.py
+++ b/validitysensor/flash.py
@@ -38,6 +38,8 @@ def __repr__(self):
 
 def get_flash_info():
     rsp = tls.cmd(unhex('3e'))
+    if rsp[0] == 0x04:
+        return FlashInfo(None, 0, 0, 0, 0, [])
     assert_status(rsp)
     rsp = rsp[2:]
     hdr = rsp[:0xe]
diff --git a/validitysensor/usb.py b/validitysensor/usb.py
index 464b092..1bebfd8 100644
--- a/validitysensor/usb.py
+++ b/validitysensor/usb.py
@@ -87,7 +87,7 @@ def send_init(self):
         # c28c745a in response is a FwextBuildtime = 0x5A748CC2
         rsp = self.cmd(unhexlify('4302'))  # get_fw_info()
 
-        assert_status(self.cmd(init_hardcoded))
+        self.cmd(init_hardcoded)
 
         (err, ), rsp = unpack('<H', rsp[:2]), rsp[2:]
         if err != 0: