Author Topic: esp8266 CH_PD useful for anything?  (Read 10685 times)

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Offline ralphd

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esp8266 CH_PD useful for anything?
« on: May 28, 2015, 01:26:28 am »
I have ESP-01 and ESP-03 modules, both of which have CH_PD(aka CHIP_EN) broken out.  Has anyone seen CH_PD put to good use?  Since bringing it low completely powers down the chip including the RTC, it isn't even useful for implementing deep sleep.
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Offline Muxr

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Re: esp8266 CH_PD useful for anything?
« Reply #1 on: May 28, 2015, 02:04:42 am »
I have ESP-01 and ESP-03 modules, both of which have CH_PD(aka CHIP_EN) broken out.  Has anyone seen CH_PD put to good use?  Since bringing it low completely powers down the chip including the RTC, it isn't even useful for implementing deep sleep.
ESP-01 and ESP-03 were initially meant to be used as an Arduino WiFi module. In that aspect it made sense to break out CHIP_EN so that the user could disable the device when not in use (to save power).

Now that people have figured out how to replace the firmware on the module and run code on it there is little use for it.
 


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