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Thank you @stonehedge that looks a mighty useful thing, I will take a look at that.
Thank you @stonehedge that looks a mighty useful thing, I will take a look at that.
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graunch
The power management on these ESP8266 based dev boards is both simple and awesome.
If you jumper between RST and GPIO16 you can turn off everything on the board including the CPU, radio and RAM for a specified amount of time leaving only the system clock running and then use RST to send a wake signal to GPIO16 when that elapsed time is up...thus waking everything up again.
To give you an idea what this means for battery life, this board normally idles at about 140mAh. When in deep sleep mode I have measured it as only using 10 *micro*Amps.
This is the difference between having a battery life of a few days and a battery life of a year or so for the application I am writing.