char pressStg[10];
dtostrf(pressure, 9, 3, pressStg);
sprintf(msg, "Pressure: %s, pressStg);
will result in msg containing "Pressure: 98.640" if pressure is 98.640.
char pressStg[10];
dtostrf(pressure, 9, 3, pressStg);
sprintf(msg, "Pressure: %s, pressStg);
will result in msg containing "Pressure: 98.640" if pressure is 98.640.