   P2 float  set pwm limit on heater 2, range 0 to 255. Default 100. Returns P2.
   Q1 float  set Heater 1, range 0 to 100. Returns value of Q1.
   Q2 float  set Heater 2, range 0 to 100. Returns value of Q2.
+  Q1B float set Heater 1, range 0 to 100. Returns value of Q1 as a 32-bit float.
+  Q2B float set Heater 2, range 0 to 100. Returns value of Q2 as a 32-bit float.
   R1        get value of Heater 1, range 0 to 100
   R2        get value of Heater 2, range 0 to 100
   SCAN      get values T1 T2 Q1 Q1 in line delimited values
   T1        get Temperature T1. Returns value of T1 in °C.
   T2        get Temperature T2. Returns value of T2 in °C.
+  T1B       get Temperature T1. Returns value of T1 in °C as a 32-bit float.
+  T2B       get Temperature T2. Returns value of T2 in °C as a 32-bit float.
   VER       get firmware version string
   X         stop, enter sleep mode. Returns "Stop"
 

      1.4.3 required Arduino IDE Version >= 1.0.0
      1.5.0 remove webusb
      1.6.0 average 10 temperature measurements to reduce noise
*/

#include "Arduino.h"

/*
  TCLab Temperature Control Lab Firmware
  Jeffrey Kantor, Bill Tubbs, John Hedengren, Shawn Summey
  June 2020

  This firmware provides a high level interface to the Temperature Control Lab. The
  firmware scans the serial port for commands. Commands are case-insensitive. Any
