investigate gas sensor power consumption

[scott2b]

Given current short battery life seen w/ gas and dust sensors enabled, it is hypothesized that the gas sensor may be power hungry, particularly if the heating element is left on all the time.

Further investigation into this matter should consider the following:

• How does general power consumption compare with and without the gas sensor
• Can shutting off the gas sensor between sampling improve battery life?
• Would the new Adafruit gas sensor breakout be useful? https://blog.adafruit.com/2017/11/09/new-product-adafruit-bme680-temperature-humidity-pressure-and-gas-sensor/
• How does potential shutdown and required sensor warmup time affect the overall sampling cycle?
• Given the way these gas sensors work, what are we really detecting here and how useful is this information? (compare/contrast the new Adafruit breakout with the Grove sensor)