shiznatix:
I want my bluetooth to be able to send sensor readings to my phone and, if needed, for the phone to be able to send information to my Arduino. Right now it only partially works.
OK Here are some notes I have put together
http://homepages.ihug.com.au/~npyner/Arduino/GUIDE_2BT.pdf
http://homepages.ihug.com.au/~npyner/Arduino/BT_2_WAY.ino
The objective is to prove the point with two-way traffic. Pretty basic approach, but bulletproof all the same and, once you get it together, you should be good for anything.
No I am feeding it with 3.3v, I have seen multiple tutorials saying to use 3.3 instead of 5 but until I get it to work myself, I believe nothing
I have seen nothing but confusing junk come out of those Instructables. Feeding 3.3v to a JY-MCU may not do any harm, but cannot possibly be a good idea, and may even be a cause of your problems. The writing on the back clearly says 3.6 > 6v. It has an on-board regulator to deliver 3.3v and needs 3.6v for stable operation. This s exactly the same as a 5v Arduino requiring a minimum of 7v at the barrel jack.
I don't even have a divider on the Tx pin, but at least I can see a clear reason for doing it. it.