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  • Easy IoT weather station with multiple sensors

    Set the Upload speed (baud rate) in Arduino IDE > Tools to 115200, press and hold the Flash button on the NodeMCU and then plug the USB cable or press and hold the Flash button and press&release the Reset button while the USB cable has already been plugged. Now you can program the board. ChangeSerial.begin(115200);to:Serial.begin(74880);and choose 74880 baud for the Serial Monitor (drop-down menu in the lower-right corner) so you can see not only the messages sent from the code but even the error&restart info messages sent by ESP8266 itself.If NodeMCU disconnects-reconnects-disconnects-reconnects... from the USB then you can power the board by the phone charger and connect USB to serial adapter to TX/RX pins to see the messages or you can just ignore the Serial port. LoLin bo...see more »Set the Upload speed (baud rate) in Arduino IDE > Tools to 115200, press and hold the Flash button on the NodeMCU and then plug the USB cable or press and hold the Flash button and press&release the Reset button while the USB cable has already been plugged. Now you can program the board. ChangeSerial.begin(115200);to:Serial.begin(74880);and choose 74880 baud for the Serial Monitor (drop-down menu in the lower-right corner) so you can see not only the messages sent from the code but even the error&restart info messages sent by ESP8266 itself.If NodeMCU disconnects-reconnects-disconnects-reconnects... from the USB then you can power the board by the phone charger and connect USB to serial adapter to TX/RX pins to see the messages or you can just ignore the Serial port. LoLin boards seem to have disconnect-connect problem when using serial port, I have 2 of them and both have the same problem but sometimes, after 10-15 resets (by pressing the Reset button) they start to work normally.

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