ESP8266 Developer Zone The Official ESP8266 Forum 2022-01-11T06:03:57+08:00 https://bbs.espressif.com:443/feed.php?f=66&t=75277 2022-01-11T06:03:57+08:00 2022-01-11T06:03:57+08:00 https://bbs.espressif.com:443/viewtopic.php?t=75277&p=100543#p100543 <![CDATA[Bug: ESP8266-01 toggles GPIO level at boot]]>
I bought few ESP-01 Relay boards with a ESP8266-01 sitting on them.
The relay is triggered by the GPIO0 pin. The level of GPIO0 defined (given by HW design) to be HIGH.
However, during boot/startup before the pin goes HIGH for a very short time it goes DOWN, 0V. Short but long enough to trigger the relay.
This makes this combo useless for serious use like controlling a garage door.
This is IMHO a bug in the firmware.
Is it a known problem?

Thanks
ChrisO

Statistics: Posted by ChrisO — Tue Jan 11, 2022 6:03 am

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