avrdude: stk500v2_ReceiveMessage(): timeout

[glikar]

Here's a strange bug. If this line is part of a sketch upload fails.

lcd.print(" Dangerous!!!"); // creates up load error time out

This is the console message: "avrdude: stk500v2_ReceiveMessage(): timeout"
Three explanation marks alone also cause the error, but really why would I use !!! anyway?
Details: Ubuntu/xfce4; Arduino 1.0.5; Mega2650 ADK.

[matthijskooijman]

Hmm, I remember looking at the stk500 bootloader code and seeing that ! is some kind of special character in the protocol. Perhaps avrdude should be escaping it in the uploaded code somehow?

[cmaglie]

The triple "!!!" bug, was one of the (many) bugs resolved on the Mega2560(ADK)'s bootloader.

You must update your bootloader (or introduce workarounds in your sketch to avoid the triple exclamation mark).

For reference look:
#1183

Closing as duplicate of #392