Calculate temperature from thermistor voltage for telemetry

[nrwahl2]

From Oliver Jones:

• Calculate thermistor voltage from ADC counts and ADC rail voltage.
• Calculate thermistor R from thermistor voltage (voltage division stuff).
• Calculate temperature as function of R and thermistor T25, R25, and β (or look up T as a function of R in the manufacturer’s published data).

Ryan says the ADC (analog-to-digital converter) value would be read from ADC pin 6 (/sys/bus/iio/devices/iio:device0/in_voltage6_raw).

Ryan:

An ADC is analog to digital converter, it allow you to get analog circuit values with digital logic I would probably be best to make it apart of oresat-dxwifi-software, so the value can be sent out over the CAN bus ADC pin6 (real name AIN6) is analog pin 6 on Octavo A8, so it is a pin on all BBBs and PBs

[nrwahl2]

From Oliver: manufacturer's data (R vs T for every degree -40 to +150C) for our part, the NTCG163JX103DT1S

[bpranaw]

Resolve with this pull request