Update readme

[oweals/nmrpflash.git] / README.md

diff --git a/README.md b/README.md
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+++ b/README.md
@@ -71,6 +71,15 @@ The router did not respond. Try running `nmrpflash` with `-m` and specify
 your router's MAC address. It's also entirely possible that your device does
 not support the NMRP protocol.
 
 your router's MAC address. It's also entirely possible that your device does
 not support the NMRP protocol.
 

+###### Timeout while waiting for 0x04.
+
+After a successful file upload, `nmrpflash` waits for up to 60 seconds for an
+answer from your device. You can increase this by specifying a longer timeout
+using `-T` switch (argument is in milliseconds). 
+
+It's entirely possible that the image was flashed successfully, but the
+operation took longer than 60 seconds.
+

 ### Building and installing
 ###### Linux, Mac OS X, BSDs
 
 ### Building and installing
 ###### Linux, Mac OS X, BSDs