Re: Help on battery saving with ESP8266, battery info
Posted: Wed Mar 16, 2016 4:01 am
Hi Mattia,
My Wemos boards have been running for, in some cases, many weeks now, waking from deep sleep every 15mins without problems. I connect D0 to RST with a ~500R. I did experiment with using using 4K7. This did not work and resulted in what looks like the same situation you are facing where the deep sleep ends, a line of garbage appears on serial monitor, but the sketch does not run. I then tried 2K2, which worked well on 5V USB power, but did not work on ~3.8V battery power (3xAAA NiMH). Finally i used 510R which runs fine at either voltage.
I have also experimented with light sleep and modem sleep. I have not been able to achieve low current consumption with light sleep. In fact i found it used more current than modem sleep. In my circuit i need to monitor sensors every 2~5ms, so cannot light sleep for longer periods, which might explain my findings.
My Wemos boards have been running for, in some cases, many weeks now, waking from deep sleep every 15mins without problems. I connect D0 to RST with a ~500R. I did experiment with using using 4K7. This did not work and resulted in what looks like the same situation you are facing where the deep sleep ends, a line of garbage appears on serial monitor, but the sketch does not run. I then tried 2K2, which worked well on 5V USB power, but did not work on ~3.8V battery power (3xAAA NiMH). Finally i used 510R which runs fine at either voltage.
I have also experimented with light sleep and modem sleep. I have not been able to achieve low current consumption with light sleep. In fact i found it used more current than modem sleep. In my circuit i need to monitor sensors every 2~5ms, so cannot light sleep for longer periods, which might explain my findings.