Battery-operated temperature monitor logging data directly to Google Sheets - using ESP8266-12, DS18B20,

Electronics
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Battery-operated temperature monitor logging data directly to Google Sheets - using ESP8266-12, DS18B20, and DeepSleep
http://www.whatimade.today/battery-operated-temperature-monitor-logging-data-directly-to-google-sheets-using-esp8266-12-ds18b20-and-deepsleep/

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I’ve had good luck with an 18650 and a common 0.5 Vf rectifier diode, no active regulator needed.

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@Gordon_McLellan nice. My regulator came with the ESP but I’ll give your idea a shot.

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I has been my experience, the little regulators installed on those white adapter boards are hit and miss. Some have a decently low Iq, others are terrible.

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@Gordon_McLellan my first one. So far, so good, but I usually use lm1117

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I must admit that I never push data directly via the ESP, I always use mqtt and push it to an Orange pi which forwards it. I am now putting all the data in my own Postgres database however.

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Check out the HT7333 … worst case Iq is 8 μA (micro-amps). It comes in an SOT-89 package, which fits the layout on those white adapter boards. TI’s LM1117 Iq is 5-10 mA (milli-amps!)

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@Gordon_McLellan excellent. Will do. Thanks.