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  • esp8266 - Get 5V output from NodeMCU - Arduino Stack Exchange
    NodeMCU ESP8266 on Arduino IDE doesn't detect Wifi 0 NodeMCU Light Sensor 2 NodeMCU espcomm_sync failed 3 Use 5V pH sensor with 3 3V NodeMCU 2 Esp32 Https P
  • esp8266 - How to connect NodeMCU to NRF24L01 - Arduino Stack Exchange
    The Dx pin labels on NodeMcu and Wemos Lolin boards do not correspond to esp8266 internal io pin numbers The pins_arduino h file in core defines Dx constants which map internal io numbers to Dx labels Use RF24 myRadio(D7, D8);
  • esp8266 - How to make a 5-volt relay work with NodeMCU? - Arduino Stack . . .
    Run the relay's Vcc and Gnd pins to the MCU, not the power plug connect the power plug's +5v to the left-most pin, where the jumper once stood: JDVcc; connect the power plug ground to the MCU or the open common Gnd on the left-group of pins Now your relay coil(s) will be powered by the 5v plug, but the relay's logic and control are handled by
  • Which input pins can I use on the ESP8266 NodeMCU
    on a nodemcu, GPIO9(11) and GPIO10(12) seem to be available - (node mcu io index number in brackets) perhaps only SDD0 and SDD1 are connected to the flash ram – Jaromanda X Commented Dec 7, 2017 at 2:40
  • NodeMCU ESP8266 burnt. What have I done fundamentally wrong here?
    A 12v DR7-12 battery is providing the power for the board through a DC buck converter set to 3 3V connected to the 3 3V pin of the esp8266 I then am using pins D5 and D6 to control an L298N motor driver, which has it's 12V connected to the battery (not through the board), it's ground to the battery and the IN1 and IN2 pins connected to the D5 and D6 pins
  • How to flash a NodeMCU (ESP8266) with an external FTDI programmer?
    Hi my USB to UART bridge (CP2102) seems to be broken on one of my NodeMCU Dev Boards with ESP8266 It seems to be just that specific board since all other boards that I have can be flashed without problems I have a FTDI Programmer like this one: FTDI Programmer
  • esp8266 - NodeMCU capable of key injection? - Arduino Stack Exchange
    To emulate a USB keyboard you have to have a device with a main MCU on it which is directly connected to USB The ESP8266 on the NodeMCU is not a USB-capable MCU, and so it uses a USB to UART bridge chip to connect the ESP8266 to the USB of your computer You can't program that bridge chip, so you can't make it anything other than a serial port
  • NodeMCU ESP8266 - Which pins can I use? - Arduino Stack Exchange
    I'm trying to connect 3 LEDs to a LoLin NodeMCU ESP8266 It seems that several or "all" of the digital pins have some special use that prevents me from using them If I connect the LEDs (and set pinmode to output) to D0, D1 and D2, then the blue bootloading LED will glow constantly, and the code does not seem to run at all (nothing in serial
  • What is difference between NodeMCU and esp8266?
    Some development boards use basic esp8266 modules and some integrate the chip, flash memory and the antenna on the PCB NodeMcu is a development board with esp8266 and a firmware with the same name On the picture is a NodeMcu development board with an esp-12F esp8266 module soldered to the PCB of the NodeMcu The development board adds
  • esp8266 - UART connection between Arduino Nano and NodeMCU - Arduino . . .
    Code for trying is meaningless - Arduino says "HI", and ESP8266 should receive and print msg value Connections : Nano Rx --> ESP Tx Nano Tx --> ESP Rx Nano USB -- > Mac running repl ESP USB --> Linux running Arduino IDE BUT- when I physically connect as described the ESP BOARD freezes, in a way I can't even connect it using repl Only





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