Arduino | NodeMCU ESP8266 / ESP12E Monitoring 8 Analog Sensors with One Analog Input Using 74HC4051

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Arduino | NodeMCU ESP8266 / ESP12E Monitoring 8 Analog Sensors with One Analog Input Using 74HC4051 Multiplexer. In this project video I use Arduino IDE 1.8.9 , Notepad++ V7.7.1 , 74HC4051 Multiplexer and LoLin NodeMCU V3 ESP8266 / ESP12E.

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If an error occurs like this or something like this :

Exception (3):

epc1=0x4000bf64 epc2=0x00000000 epc3=0x4000473f excvaddr=0x4023d571 depc=0x00000000
ctx: cont
sp: 3ffffd00 end: 3fffffc0 offset: 01a0

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I am getting an error like D3 was not declared in scope..can you please help with this

vandanatankala
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this eorr -- redefinition of 'void handleRoot()'

chathishkadilshan
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I have a problem on NODEMCU ESP8266. When i try to connect to the web interface, the Wi-Fi is disconnected from the device. Tried on two different modules ESP 8266. Tell me please what could be a problem? Thanks
P.S. I haven’t connected the sensors yet as they didn’t come. Perhaps there is a problem?

Qtekken
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Maybe late but I would love to download the sketch or source code however the link above fails. The .rar file seems empty. could you be so kind to check this out.

bertprieus
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