double ambientTemp=44.00; String yourdatacolumn="yourdata="; String yourdata; double yourarduinodata=ambientTemp; yourdata = yourdatacolumn + ... ... <看更多>

... <看更多>

It is a common misconception that, because when you print a float you only get 2 decimal places, that the float only has 2 decimal places. ... <看更多>

Contribute to arduino/ArduinoCore-API development by creating an account on GitHub. ... String::String(double value, unsigned char decimalPlaces). ... <看更多>