ESP8266 Community Forum

- Tue Jun 30, 2015 4:31 pm #22090 lethe : Thanks I didnt realise that the other sleeps would maintain a connection with the AP.. I'll read up on that...
ucy74 : If the 1.8mA is for the chip but not the memory how much does that use???
biobier : mm yes a solar panel might would work nicely.. The panel would only need to provide a couple of mA to keep the battery topped up and then when the ESP8266 TX it bursts to 50-100mA ...

Me like

Thanks all , Im now going to investigate those power consumption modes

- Tue Jun 30, 2015 5:38 pm #22096 guys,

I've found this mini solar panel on ebay (http://www.ebay.com/itm/5V-200MA-1W-Min ... 4d21d5b605) 200mA/5V/1W .. and only US$3.79

Im thinking of using this , with a couple of NiMh AA batteries and I should be ok.. I dont think I'll need any special cricuittry as the panel provdes 200mA (in florida Im guessing so lower in UK) and NiMh then to be around 1800mHa so the chance of over charging is close to zilch right??? #noob electronics question.

Last edited by Angelo Santagata on Tue Jun 30, 2015 5:50 pm, edited 1 time in total.

- Tue Jun 30, 2015 5:50 pm #22097

ucy74 : If the 1.8mA is for the chip but not the memory how much does that use???

This would be a typical chip found on ESP-12 modules: http://elinux.org/images/f/f5/Winbond-w25q32.pdf
The datasheet claims a standby current of 50uA and max. read current 18mA @80MHz, so it basically depends on how many read operations the ESP has to perform. I don't have any real world data for the total power consumption, but an additional 1mA avg. power consumption seems realistic to me (maybe less, if the ESP can fit most of the code in its cache).

- Tue Jun 30, 2015 6:01 pm #22099 Thanks