how to transmit float via uart

[IanB]

It is, probably, a sign that something has gone a bit wrong when you start using floating point calculations on a little microcontroller for basic arithmetic.

For instance, if the speed of sound in water is 1500 m/s, then a signal will travel 1500 m in a second, or 1500 mm in a millisecond, or 1.5 mm in a microsecond. So you can just measure the time interval in microseconds, multiply by 1.5 (trivial in binary arithmetic), and you have the distance in mm.

[mzdenkov]

Thank you guys. snprintf works... as it looks like sir " suicidaleggroll" found other mistake in seting TX as output.
After 20 times of sending random numbers ... i see what i need to see... FLOAT as ASCII on TX line.

[mzdenkov]

One more thing, i have some time to calculate values:

Mesurements are started in interval of ~ 1 sec with timer... other is happens in interrupts like on flow chart