When I tried to comment the BTSerial, The GSM is working, but when I uncomment it, It's not working. #include <SoftwareSerial.h> #include <LiquidCrystal.h> SoftwareSerial mySerial(7,8); SoftwareSerial BTSerial(10, 11); const int rs = 13, en = 12, d4 = 2, d5 = 3, d6 = 4, d7 = 5; LiquidCrystal lcd(r…

Arduino Uno with HC-05 and GSM sim900 not working

dannable October 21, 2017, 10:25am 3

The use of two software serial instances is not recommended. Read the reference page:

You should give some consideration to moving up to a Mega, they have three hardware serial ports.

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