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![Pin diagram of NodeMCU ESP8266.[6] | Download Scientific Diagram](https://www.researchgate.net/publication/347689883/figure/fig3/AS:974724557463565@1609403852391/Pin-diagram-of-NodeMCU-ESP82666.png "Pin diagram of NodeMCU ESP8266.[6] | Download Scientific Diagram")
Pin diagram of NodeMCU ESP8266.[6] | Download Scientific Diagram
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![Node MCU pins layout [22] | Download Scientific Diagram](https://www.researchgate.net/publication/326115044/figure/fig1/AS:643930567753728@1530536419189/Node-MCU-pins-layout-22.png "Node MCU pins layout [22] | Download Scientific Diagram")