ESP8266 Developer Zone

Re: Anyway to speed up the boot up time

2016-08-29T11:02:42+08:00

Based on this repo at https://github.com/pvvx/SDKnoWiFi, it does not seem like a hardware limitation.

But this post at http://www.esp8266.com/viewtopic.php?f=6&t=9653&hilit=deep+sleep+wake+up+time shows that deep sleep wake up times using the deep sleep API is >200 ms. So, I guess there's no way to further reduce the wake up time (without building some other binary)?

Statistics: Posted by Guest — Mon Aug 29, 2016 11:02 am

Re: Anyway to speed up the boot up time

2016-08-27T15:39:10+08:00

Or if there is absolutely no way to do so, can the Espressif folks let me know?

Statistics: Posted by Guest — Sat Aug 27, 2016 3:39 pm

Re: Anyway to speed up the boot up time

2016-08-25T21:13:37+08:00

Bump. Is there really no way to speed up the boot up time (rather than the deep sleep wake up time)?

Statistics: Posted by Guest — Thu Aug 25, 2016 9:13 pm

Re: Anyway to speed up the boot up time

2016-08-24T14:54:39+08:00

From the getting started guide:

Q : How to short the booting time (include awakened from deep sleep) ?
A : RF will do self-calibration by default during booting. But since esp_iot_sdk_v1.3.0, users can
configure RF to do calibration only at the first-time power-on, and store the calibration parameters
into the flash, so that they don’t need to calibrate RF again when the chip is booting up.

I have an ESP12F and put esp_init_data_default.bin at 0x3FC000 but there was no difference in boot up times.

Statistics: Posted by Guest — Wed Aug 24, 2016 2:54 pm

Re: Anyway to speed up the boot up time

2016-08-24T14:21:44+08:00

@Helios: So what is the API to disable RF during bootup?

Statistics: Posted by Guest — Wed Aug 24, 2016 2:21 pm

Re: Anyway to speed up the boot up time

2015-07-14T11:28:57+08:00

Hi Wanqiu
Thanks for your information.
As you know, we have provided such API for deep-sleep.
However, you apply the external circuit to do power gating, rather than deep-sleep.

We will provide the API for your case as soon as we finish the testing.

Statistics: Posted by Helios — Tue Jul 14, 2015 11:28 am

Re: Anyway to speed up the boot up time

2015-07-14T11:23:52+08:00

Hi tve,
The RF calibration after booting need not stop software and will not affect the sleep processes.
No problem to do deep-sleep per 1S.

Statistics: Posted by Helios — Tue Jul 14, 2015 11:23 am

Re: Anyway to speed up the boot up time

2015-07-14T09:37:59+08:00

Thanks for replies.
For our case, it is crucial that we can turn off the RF calibration part during startup.
Basically, we have a sensor attached to this system. When power on, we check the sensor status, and only when the status changed, it reports to server, otherwise, it will be turned off by external power gate. By doing so, we achieved the best power usage scenario.
Please do help us with a new API for this.

Statistics: Posted by wanqiu — Tue Jul 14, 2015 9:37 am

Re: Anyway to speed up the boot up time

2015-07-14T06:10:17+08:00

I understand that the calibration happens in the background. I'm wondering about the need to calibrate at boot. How do you recommend I decide whether calibration is needed at boot? If you tell me that normally recalibration happens every 60 seconds and my module goes into deep sleep for 1 second then I don't need to recalibrate at boot. But if my module goes into deep sleep for 10 minutes then I should really do the recalibration at boot. Can you please provide some information about how often the recalibration happens when the module is not sleeping?

Statistics: Posted by tve — Tue Jul 14, 2015 6:10 am

Re: Anyway to speed up the boot up time

2015-07-14T01:13:11+08:00

the RF calibrations are background tasks and transparent for user's software.

Statistics: Posted by Helios — Tue Jul 14, 2015 1:13 am

Re: Anyway to speed up the boot up time

2015-07-13T23:57:59+08:00

How often is the RF module recalibrated if the module stays powered-on permanently?

Statistics: Posted by tve — Mon Jul 13, 2015 11:57 pm

Re: Anyway to speed up the boot up time

2015-07-13T21:32:29+08:00

If this API is helpful, Espressif Engineers shall add it into normal booting besides deep-sleep wakeup. Thank.

Statistics: Posted by Helios — Mon Jul 13, 2015 9:32 pm

Re: Anyway to speed up the boot up time

2015-07-13T16:28:39+08:00

The RF initialization takes most of the 300mS.
When ESP8266 wake up from deep-sleep, the SDK provide the options to disable RF initilization.

Could you kindly try the deep-sleep options? Check whether the booting time is good enough for your applications.
system_deep_sleep_set_option(4); // don't enable RF module
or
system_deep_sleep_set_option(2); // don't enable RF calibration

Statistics: Posted by Helios — Mon Jul 13, 2015 4:28 pm

Anyway to speed up the boot up time

2015-07-08T09:40:01+08:00

Currently, it takes about 300ms for the system to start executing the user_init() code. I guess there are many modules to be initialised.
Is there any possibility that we can configure which modules to be initialised during boot up so that we can speed up the boot up time.
For example, we might not need to initialise the RF module during boot up?

Statistics: Posted by wanqiu — Wed Jul 08, 2015 9:40 am