I have bought a JY-MCU bt board also called RS232 TTL i think, I want to use it to controll my arduino uno, with my android phone, using the app amarino. But I don't get it to work. I had to change the baud rate to 115200, form 9600. To do that I read that I had to pull pin 34 high. So I soldered a wire to that pin and connected it to 5v. Then I conected the vcc pin on the bt to 5v on the arduino, and the gnd to gnd. I also connected the rx on the bt board to the tx on the uno, and the tx on the bt to the rx on the arduino.
When all these connections are done, and I connected the arduino to a battery. The bt boards led start to blink. And that's all it does. When I try to connect to it with my laptop, i find it, and the code is right. But when i tryed to send at comands to it trough the serial monitor, nothing happens, and the monitor freezes. And i can't do anything with my phone either. What should i do. What is wrong.
Sry, for my bad english.