Aight so what I'm doing here is taking a read value from a single-pin output on a vacuum gauge (0-10v) and using a voltage divider to get it down to readable values (hence the 2 * in the expression) and using a formula provided in the user manual to convert the read voltage into a value in torr. The given conversion expression there is that Pressure=10^(1.66*Voltage-11.46), which gives valid values for 0-10 volts as atmospheric pressure is 760 torr and the gauge reads down to 3.8x10^-9 Torr. The problem I have is with the actual composition of the code, as I have limited experience with C and Arduino. The output basically must be in scientific notation, but since dtostre() isn't exactly a beginner function, I haven't been able to find an easily understandable explanation of its usage in any API on the internet. From what I can gather about its class of function it will store a floating point variable as a string, which would be easily printable, but I have no clue how this would be done.