Send AT Commands to HM-10 via AI2 and print it's response in the app

MIT App Inventor Help
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3

I couldn't wait, so I followed your links and downloaded the app source, and tidied it up for a nice board post ...
RadeniteBOOST.aia (165.7 KB)

BLE version
BLE version478×460 39.5 KB
blocks
blocks677×1488 97.2 KB
Designer
Designer903×461 116 KB

Here is the AI2 HM10 FAQ:

Also see the main BLE FAQ:

Note the recent BLE version change and extended version cleanup instructions.