CapnBry
commented
1 year ago Themistors are just resistors, so all you need to do to measure temperature with them is to form a voltage divider then math out the temperature using the Steinhart coefficients (yup, you've got the right values). The code that does that is here (and the next 12 lines): https://github.com/CapnBry/HeaterMeter/blob/master/arduino/heatermeter/grillpid.cpp#L390
I use [3] to store the resistance of the other half of the voltage divider, which for HeaterMeter is set up as: 3.3V -> 10k resistor (this is the [3]) -> themistor -> GND.
I can't help you write your own thing from scratch I'm afraid, but good luck and have fun! If you have any questions you can try asking at the official forum group, as the Github issue tracker is not a Q&A support system.
Hello.
Thank you for this wonderful resource. I stumbled upon this project when looking for a way to measure & monitor my oven temp accurately. Unfortunately, to try it out, I found most of the components in the hardware list is not available at Mouser and HeaterMeter store is down for me. Anyway, to begin with, I just wanted to simply read the temp using Arduino/Esp32.
I bought 2 probes as recommended (TX-1003X-AP & TX-1001X-OP). Is there any place I can look to see (initial commit, tutorial) how to use these probs for basic measurements?
If not, I found a simple tutorial at https://github.com/skyeperry1/Maverick-ET-73-Meat-Probe-Arduino-Library After learning, I guess I need to know few parameters to calculate the temp. looking at the code in this repo, I see Steinhart-hart constants defined here Are these (7.3431401e-4,2.1574370e-4,9.5156860e-8) the right value for thermoworks pro series?
I couldn't find the thermistor resistance. Can you please point to where in the code it is defined.
Thank you for your time. bsr