Why the mBot Mega cannot be controlled by Makeblock app, which was recognized as "Ultimate 2.0"?

Some products are with this problem due to the old firmware version. 

In this case, you may need to use mBlock5 software, select device "mBot Mega" and update the "Online Firmware" to realize correct app control; 
If you want to use the origin functions of mBot mega(Line following/avoid obstacles), you may need to update the "Factory Firmware". 
Please refer to here for detail information.
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  • I’d like to know if I can modify the MBot Mega’s behavior as it detects it’s different sensors while it is running under control of the BT Driver app on my phone? Is that block code or Arduino sketch available to modify it to the user? How do I access it to modify it? 


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