I'm using the dtostrf instruction to convert a float variable to string , but sometimesthe result returns the NANO string. A that is because of?, That condition returns NANO? I need to know when it returns this string to debug that time.

dtostrf return NANO

system April 17, 2014, 5:30pm 8

The solution has been:

if (Dirroe==Refroe) Roe=1.00;