#Ardunio Send Float values with bluetooth.print in arduino

Question

I have been creating the example for bluetooth communication with arduino with hc_05 Problem I am facing are below.

String statuss= "1.00,2.00,3.00";
bluetooth.print(statuss);
Serial.print(statuss);

This is the code where is get only last 2 digits i.e 00 in android while its showing me complete string in serial monitor.

String statuss= "Hello";
bluetooth.print(statuss);
Serial.print(statuss); 

Then I get the output as ello in Android n in Serial monitor it show Hello

Can Anybody suggest the whats the problem

Answer 1

I suspect (at first sight) a speed problem. Android runs Bluetooth at 115200 Bauds. So you must set your HC-05 o HC-06 at this speed to get proper result.

But as you perform "bluetooth.print(statuss);" and also "Serial.print(statuss);" this mean you have created a virtual port, probably using the Software Serial lib. Unfortunatly, this lib is not very efective. At speed higher than 19200 Bauds, you lost data (I've had a lot of problem with that before understanding!!) The only right way is to use directly the RX and TX port of the Arduino (pin 0 and 1) and use (eg) a LCD Display to display data and help you debugging your Arduino code (as when you plug the HC on Pin 0 and 1 you lost the access to the serial monitor).

A trick: with the HC on pin 0 and 1, each time you send the sketck to the Ardino, you must unplug RX as it's used for sending the code.

Hope this will help.

Answer 2

It is difficult to know your exact problem since you have not provided your code. However, I believe that you don't have a clear starting bit and a clear end bit, so that the modules don't know when to Start and End.