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The Flash button on NodeMCU is connected between io 0 and ground. you You can use it as a button. Set Set pinMode(0, INPUT_PULLUP) and you will read io 0 LOW if the button is pressed.

NodeMCU schema

To put the module in flashing mode, first the Flash button must be holdheld and the Reset button pushed, only then sould the Flash button be released. Normally, the reset to flashing mode is done automaticaly by esptool before uploading over USB. This uses the circuit connected to serial RST and DTS lines.

The Flash button on NodeMCU is connected between io 0 and ground. you can use it as a button. Set pinMode(0, INPUT_PULLUP) and you will read io 0 LOW if the button is pressed.

NodeMCU schema

To put the module in flashing mode, first the Flash button must be hold and Reset button pushed, then Flash button released. Normally the reset to flashing mode is done automaticaly by esptool before uploading over USB. This uses the circuit connected to serial RST and DTS lines.

The Flash button on NodeMCU is connected between io 0 and ground. You can use it as a button. Set pinMode(0, INPUT_PULLUP) and you will read io 0 LOW if the button is pressed.

NodeMCU schema

To put the module in flashing mode, first the Flash button must be held and the Reset button pushed, only then sould the Flash button be released. Normally, the reset to flashing mode is done automaticaly by esptool before uploading over USB. This uses the circuit connected to serial RST and DTS lines.

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no you can't use it in sketch. the circut connected to the button resets the NodeMcu while holding io 0 LOW. Trust no one. The opposite is true for NodeMCU. It was Grove UART WiFi esp8266 module with described circuit I remembered.

The Flash button on NodeMCU is connected between io 0 and ground. you can use it as a button. setSet pinMode(0, INPUT_PULLUP) and you will read io 0 LOW if the button is pressed.

NodeMCU schema

To put the module in flashing mode, first the Flash button must be hold and Reset button pushed, then Flash button released. Normally the reset to flashing mode is done automaticautomaticaly by esptool before uploading over USB. This uses the circuit connected to serial RST and DTS lines.

no you can't use it in sketch. the circut connected to the button resets the NodeMcu while holding io 0 LOW. Trust no one. The opposite is true for NodeMCU. It was Grove UART WiFi esp8266 module with described circuit I remembered.

The Flash button on NodeMCU is connected between io 0 and ground. you can use it as a button. set pinMode(0, INPUT_PULLUP) and you will read io 0 LOW if the button is pressed

NodeMCU schema

To put the module in flashing mode, first the Flash button must be hold and Reset button pushed, then Flash button released. Normally the reset to flashing mode is done automatic by esptool before uploading over USB. This uses the circuit connected to serial RST and DTS lines.

The Flash button on NodeMCU is connected between io 0 and ground. you can use it as a button. Set pinMode(0, INPUT_PULLUP) and you will read io 0 LOW if the button is pressed.

NodeMCU schema

To put the module in flashing mode, first the Flash button must be hold and Reset button pushed, then Flash button released. Normally the reset to flashing mode is done automaticaly by esptool before uploading over USB. This uses the circuit connected to serial RST and DTS lines.

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no you can't use it in sketch. the circut connected to the button resets the NodeMcu while holding io 0 LOW. Trust no one. The opposite is true for NodeMCU. It was Grove UART WiFi esp8266 module with described circuit I remembered.

The Flash button on NodeMCU is connected between io 0 and ground. you can use it as a button. set pinMode(0, INPUT_HIGHINPUT_PULLUP) and you will read io 0 LOW if the button is pressed

NodeMCU schema

To put the module in flashing mode, first the Flash button must be hold and Reset button pushed, then Flash button released. Normally the reset to flashing mode is done automatic by esptool before uploading over USB. This uses the circuit connected to serial RST and DTS lines.

no you can't use it in sketch. the circut connected to the button resets the NodeMcu while holding io 0 LOW. Trust no one. The opposite is true for NodeMCU. It was Grove UART WiFi esp8266 module with described circuit I remembered.

The Flash button on NodeMCU is connected between io 0 and ground. you can use it as a button. set pinMode(0, INPUT_HIGH) and you will read io 0 LOW if the button is pressed

NodeMCU schema

To put the module in flashing mode, first the Flash button must be hold and Reset button pushed, then Flash button released. Normally the reset to flashing mode is done automatic by esptool before uploading over USB. This uses the circuit connected to serial RST and DTS lines.

no you can't use it in sketch. the circut connected to the button resets the NodeMcu while holding io 0 LOW. Trust no one. The opposite is true for NodeMCU. It was Grove UART WiFi esp8266 module with described circuit I remembered.

The Flash button on NodeMCU is connected between io 0 and ground. you can use it as a button. set pinMode(0, INPUT_PULLUP) and you will read io 0 LOW if the button is pressed

NodeMCU schema

To put the module in flashing mode, first the Flash button must be hold and Reset button pushed, then Flash button released. Normally the reset to flashing mode is done automatic by esptool before uploading over USB. This uses the circuit connected to serial RST and DTS lines.

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