Hello everyone. I have an Arduino Mega 2560 and Bluetooth module (HC-05). I want to send a string ("Hello World") from Arduino via HC-05 to my phone ( Galaxy S9) on Screen 2.. I encountered a problem in which I always get weird message on label 3 and 4. Sometimes it is question mark, sometimes i…

Everything already said by @Patryk_F and @ABG is definitely correct, please be sure to follow their hints. I would only add some info about the Arduino side: Please be aware that the delay() function in the Mega implementation completely blocks the CPU, that becomes irresponsive to any other activ…

Receiving String fromHC-05

MIT App Inventor Help

ABG March 31, 2024, 10:13pm 8

Sorry, I can't support multiple screens using Bluetooth.

Search the forum for such attempts.