Joseph Ellsworth / temp-thermisterfor-ERT-J0

Calculate temperature based on resistance from thermistor with lookup chart

thermister_ert-j0eg1.h@6:3c9cb2bd08c6, 2016-04-02 (annotated)

Committer:
joeata2wh
Date:
Sat Apr 02 03:48:56 2016 +0000
Revision:
6:3c9cb2bd08c6
Parent:
5:88bf5a42812e 
basic data log working

Who changed what in which revision?

UserRevisionLine numberNew contents of line
joeata2wh 6:3c9cb2bd08c6 1 /* thermister_ert-j0eg1.h
joeata2wh 6:3c9cb2bd08c6 2 Read the ERT0xxx thermister and return the temperature
joeata2wh 6:3c9cb2bd08c6 3 in C on the specified pin. Includes lookup table to
joeata2wh 6:3c9cb2bd08c6 4 compute precision temperature based on non-linear
joeata2wh 6:3c9cb2bd08c6 5 change of resistance in thermister.
joeata2wh 6:3c9cb2bd08c6 6
joeata2wh 6:3c9cb2bd08c6 7 Update the resitance array in cpp to properly reflect
joeata2wh 6:3c9cb2bd08c6 8 your specific device.
joeata2wh 6:3c9cb2bd08c6 9
joeata2wh 6:3c9cb2bd08c6 10 By Joseph Ellsworth CTO of A2WH
joeata2wh 6:3c9cb2bd08c6 11 Take a look at A2WH.com Producing Water from Air using Solar Energy
joeata2wh 6:3c9cb2bd08c6 12 March-2016 License: https://developer.mbed.org/handbook/MIT-Licence
joeata2wh 6:3c9cb2bd08c6 13 */
joeata2wh 0:39f659087759 14 #ifndef thermister_ert_j0eg1_h
joeata2wh 0:39f659087759 15 #define thermister_ert_j0eg1_h
joeata2wh 5:88bf5a42812e 16 #define ERTThermisterAdcRef 3.30f
joeata2wh 5:88bf5a42812e 17 #define ERTThermisterErrorOver 255.0f
joeata2wh 5:88bf5a42812e 18 #define ERTThermisterErrorUnder -255.0f
joeata2wh 0:39f659087759 19
joeata2wh 0:39f659087759 20 float conv_c_to_f(float tempC);
joeata2wh 5:88bf5a42812e 21 float conv_f_to_c(float tempF);
joeata2wh 5:88bf5a42812e 22 float ERTThermisterReadTemp(AnalogIn adcpin);
joeata2wh 5:88bf5a42812e 23 float ERTThermisterAvgReadTemp(AnalogIn adcpin, int numRead);
joeata2wh 5:88bf5a42812e 24
joeata2wh 5:88bf5a42812e 25
joeata2wh 5:88bf5a42812e 26
joeata2wh 5:88bf5a42812e 27 // Shorthand to read thermister by pinName
joeata2wh 5:88bf5a42812e 28 // rather than reading it with pre-allocated
joeata2wh 5:88bf5a42812e 29 // AnalogIn.
joeata2wh 5:88bf5a42812e 30 float ERTThermisterRead(PinName apin);
joeata2wh 5:88bf5a42812e 31
joeata2wh 5:88bf5a42812e 32 // read the temp from thermister and print out
joeata2wh 5:88bf5a42812e 33 // both the reading and intermediate values.
joeata2wh 5:88bf5a42812e 34 float ERTThermisterReadPrint(Serial log, char *label, PinName apin);
joeata2wh 0:39f659087759 35
joeata2wh 0:39f659087759 36 #endif