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According to the docs (emphasis added): Warning This function requires the enhanced NBC/NXC firmware version 1.31+ Make sure you are using the enhanced firmware provided with NXC and not the official firmware from LEGO.
I finally figured this out... It's broken! Fried. Saw one do this after getting dropped. Never worked correctly again. Sorry, man. Buy a new one, I guess. Nothing to be done here.
I just had an idea. Have the output of the bluetooth message receiver block run into the input of the display block. Then, I have some other device sending messages that I type in.
Is this even slightly possible or a waste of time? It might be possible but requires research and probably a fair amount of research and hacking on your part. I'm not saying I know for sure if an exploit exists, either in the communications protocol or the BT firmware, but exploits are always possible. And it's not like LEGO is incentivized to look for ...
I think that most sumo bot competitions do not allow interchange of information between bricks. And you have to connect via Bluetooth with your opponent's bot, which requires your opponent's permission.
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