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I'm using esp12e for my project and encountered difficulty in using more than 5 GPIOs. I have connected GPIO15 to Ground, GPIO0 to VCC, Enable to VCC (Connections as as per attached image). I'm able to use only GPIO4,5,12,13 & 14 (5 IOs) as normal IOs. How can I use more pins as IOs? Connections

saurabh kandalkar
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  • https://electronics.stackexchange.com/questions/402066/esp8266-free-gpios-for-relay-switching/404845#404845 – Juraj Jun 12 '20 at 13:23

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This is the setup I have used for 4 relays and 4 touch switches on ESP8266-E. But there is occasional problem with relay4 as the connected wall light blinks rapidly in sync with onboard LED. I think instead of GPIO-2/D4, I should have used GPIO-3/RX pin.

enter image description here

N Singh
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