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My early Blogs about moving data between Arduino and Android apps developed using MIT AppInventor were posted back in 2014. Since then I've learned a little more about some of the features of AppInventor and also how to use Arduino SoftwareSerial.   Connecting the Arduino UNO to the HC06 Bluetooth Adapter   My 2014 Blogs had the HC06 TXD and RXD connections "piggy-backed" onto the hardware UART of the UNO - pins RXD/D0 and TXD/D1.   Note that the signal to the RXD input of the ...