ESP8266 Community Forum

- Mon Jul 27, 2015 3:18 am #24358 The chip will enter this sleep mode if it is activated and there are no ongoing transfers. I measures around 4-5 ma current consumption when in this mode with my module.

extern "C" {
void system_phy_set_max_tpw(uint8 max_tpw);
#include "user_interface.h"

}

wifi_set_sleep_type(LIGHT_SLEEP_T);

- Mon Jul 27, 2015 9:42 pm #24430 Light sleep is active by default (in STA mode only). Both light and modem sleep are used by Espressive in underlying system and user does not have direct control over it.

More information:
http://bbs.espressif.com/viewtopic.php?f=7&t=171&p=617

- Wed Jul 29, 2015 7:52 am #24536 Thank you.

I got 4 days from my temperature/humidity sensor, 4 AA batteries, and sending data every 30 seconds. Much better than expected, and I'm sure if I needed to I could optimise that more. Perhaps by storing data and sending it in groups hourly, or venturing into deep sleep modes.

- Thu Jul 30, 2015 10:36 am #24630 Hi, could you explain this a little further please?

I would like to achieve the following:

I currently have an ESP-01 running a sketch that reads a couple of sensors and sends the the results to a remote server using HTTP GET, passing the sensor readings as parameters to a PHP script on the server. Standard stuff. This process takes < 5 secs. Then I want it to sleep for 5 mins before the next reading.

I have read about deep sleep, but the only way to achieve this, as far as I can tell, is to make hardware mods to the ESP-01 that are beyond my skill with a soldering iron.

So could this light sleep offer me an attractive compromise? If so, what do I do in place of delay(300000UL) ?

Thanks,

Paul