Ok, I dug through Multichannel_Gas_GMXXX.h file and I found the function that outputs the Voltage:
inline float calcVol(uint32_t adc) {
return (adc * 3.3) / GM_RESOLUTION;
Q1. Is this the Vs voltage?
Q2. What is adc? It is not defined anywhere.
Q3. If the output voltage is Vs, then,
Rs = (Vc-Vs)/Vs, where Vc = 3.3 V. Is this correct? (is it like in MQ9 sensor?)
From here I can find my way and recalibrate everything. Just need some directions and validation.
Thanks.
V.