psf-b01-gl - SERP Analysis

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https://www.alibaba.com/product-detail/PSF-B01-WIFI-Switch-Module-Low_1600164581119.html

https://community.home-assistant.io/t/old-sonoff-switch-depraced-replace-with-esphome/228616

https://github.com/peterbuga/HASS-sonoff-ewelink/issues/15

https://www.facebook.com/ewelink.support/posts/whats-new-in-v460-wifi-settings-feature-to-change-wifi-info-without-re-adding-de/3426677164089876/

https://forum.ewelink.cc/t/alexa-related-issue-sonoff-devices-are-automatically-and-randomly-turning-off/10960?page=4

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https://sonoff.tech/news-and-events/automatic-dst-adjustment-for-seamless-smart-home-automation/

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https://community.home-assistant.io/t/ha-with-tuya-smart-wi-fi-plug-wl-sc01/721058

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https://community.openhab.org/t/ewelink-sonoff-binding-new-binding-without-flashing/116141?page=15

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https://spanish.alibaba.com/g/psf-b01.html

https://www.zweiic.com/product/detail/store/525.html

https://item.szlcsc.com/product/jpg_180320_0.html

https://www.youtube.com/watch?v=FlFJ4pc9R2c

https://www.douyin.com/search/%E6%98%93%E5%BE%AE%E8%81%94PSF-B01-GL

https://devices.esphome.io/devices/eWelink-5V-12V-Inching-Relay

https://www.worldwayelec.com/pro/ps/psf-b01-gl/5184110/psf-b01-gl.pdf

https://tasmota.github.io/docs/Pinouts/

https://groups.google.com/g/sonoffusers/c/NF1EbdAHREM

https://www.electronics-lab.com/build-smart-home-solutions-in-10mins-using-iteads-psf-b-series-1-4-gang-ultra-low-power-esp8285-wi-fi-switch-module/

https://www.alibaba.com/product-detail/ligent-one-way-four-WIFI-switch_1600220075426.html