I'm making a program to use my arduino as an alarm. But I have trouble sending variables from my smartphone to Arduino via bluetooth.
I made a smartphone application by app inventor. And I used the block Send4ByteNumber because I have to send number up to 1008000. But I found this block send a variable in 4bytes. And I don't know how can arduino receive them through bluetooth.
I tried to receive them all but I received only one. How can arduino receive 4bytes of variables via bluetooth? PLEASE HELP.