ESP8266 Community Forum

- Fri Jul 22, 2016 11:46 am #51270 Hmm seems there is an issue with the moisture sensor, incorrect readings, can anyone suggest a better moisture sensor than this one, or could it be interference from the ESP?

http://www.ebay.es/itm/172182751330

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- Fri Jul 22, 2016 2:00 pm #51278 Well that sucks, neither of the devices lasted more than a few hours, that is actually less than what I have had before sleep was integrated.

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- Fri Jul 22, 2016 4:17 pm #51286 Just some examples:
a) my "light clock" (60 LEDpixels) draws ~60mA for the LEDs and depending on the state 15ma (normal mode with radio sleep) / 150mA (every 4h for fetching ntp time) for the ESP. This lasts about 4 days on 3p LiIon cells from an old laptop battery.
b) my "indoor weatherstation" with am2321 and 1"OLED draws ~15mA for 2s (measurment, wifi disabled) and 4mA for 13s (OLED only, ESP deep sleep). This runs about 2 weeks on 2p LiIon cells as above.
c) my "outdoor unit" with BME-280 takes a measurment, uploads to thingspeak (~4-5s) and goes into deepsleep for the rest of 15min. It is on 2p LiIon cells for one month and still running, voltage still over 3.6V, so several more weeks/month? to expect.

A 9V block is definitely the worst possible choice. With 9V most of the energy is wasted in the regulator.
If your device draws avg. 30 mA @ 3.3V, it consumes 0.1W. The regulator has to get rid of 5.6V, wasting 0.17W almost twice what is needed for the primary purpose.

- Fri Jul 22, 2016 4:22 pm #51287 Thanks I have a multimeter but when I connected to the vcc and ground of the ESP8266 it wasn't seeming to work where is the best place on the circuit to add the multimeter for testing.

I am going to follow this guys example he seems to have it running for 3 months on 2xAA

http://homecircuits.eu/blog/battery-pow ... ot-logger/

Amazing selection of ESP8266 and ESP32 modules can be found here.