Questions tagged [esp8266]
An IC that offers Wi-Fi networking compatible with b/g/n standards. It also has integrated TCP/IP protocol stack. Extremely popular along IoT community as a low cost and powerful board.
2,021 questions
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How to read and write EEPROM in ESP8266
I need to know how I can write integer values in EEPROM and retain the value on power on.
char *Red = strstr(myTestUrl, "/R");
if (Red) {
int RedValue = atoi(Red + 2);
analogWrite(12, RedValue);
...
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Can ESP8266 replace Arduino?
I’m a hobbyist and have used Arduino so far for simple projects. Now I want to build a project involving addressable LEDs, I want to write several programs on the Arduino for the LEDs and on my phone ...
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Difference between these two NodeMCU boards?
I recently received a NodeMCU (identical to the one shown in the first picture below) and originally, I was unable to connect it to my computer which eventually turned out to be driver issues; however,...
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How to change baudrate of ESP8266 (12e) permanently?
IMPORTANT: DO NOT USE AT+IPR=9600! (see update)
I have an ESP8266 12E module that communicates at 115,200 bauds. Since I use it with an Arduino Nano with SoftwareSerial things get messy. So I found ...
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ESP8266, Arduino IDE vs Lua?
I'm planning to buy an ESP8266. Do I really need to learn Lua to play with it? I have seen some people using it with the standard Arduino IDE.
Do you need a custom firmware to use the Arduino IDE ...
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NodeMCU - use flash button as input in loop()
I couldn't find a proper answer on the net so I came here as a last resort.
So I want to use the FLASH button as an input in the loop() method.
Is there a way the check if it's pressed or not?
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Send AT commands to ESP8266 from Arduino Uno via a SoftwareSerial port
GOAL
From Arduino UNO, send AT commands to ESP8266 via a SoftwareSerial port and receive results.
CURRENT STATUS
I either send AT commands and get nothing back (wiring scheme 1) or I send AT ...
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On an esp8266 what is faster, 64-bit math or float math?
I need to do some math with vars from an attitude sensor (acclerometers and gyroscopes) on an esp8266. int32_t math with those vars does not have enough range and the float math operations are ...
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Does the ESP8266 somehow remember wifi access data?
Today I did some tinkering with an ESP8266, trying out OTA and writing a webserver. To find an error, I reduced the sketch to just the following lines:
#include <ESP8266WebServer.h>
...
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How to I make the Tx and Rx pins on an ESP-8266-01 into GPIO pins?
When programming an ESP-01 with Arduino IDE, how can I make the Tx and Rx into a generic I/O pins reliably? I think there's a command to swap the Tx and Tx with other pins. I tried serial.swap() but ...
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Both red and blue led of ESP8266 stays on
I've connected ESP8266 to Arduino UNO. After a getting a huge trouble I successfully managed to run some AT commands. I have also tested AP mode.
Then I got some trouble with software serial ...
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Same structure taking different memory space on Uno and NodeMCU ESP8266, leading to data corruption when transferring via nRF24L01+
I'm trying to transfer data between a Arduino Uno board to a NodeMCU ESP8266 board, using nRF24L01+ transceivers module and RF24 library on both side. The data I'm transferring are stored in a struct ...
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What is difference between NodeMCU and esp8266?
Since I have no previous experience in electronics I'm getting quite confused while coming across these two terms ..I'd like to know whether they're the same or different.
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ESP8266 Analog read interferes with wifi?
Short version:
I have a program that connects my ESP8266 to WIFI so I can control a relay connected to it over the internet or a button. I also have a sensor for my door. This software works ...
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Resistor pull-ups for ESP8266
I'm using 4.7kOhm resistor as pullups for GPIOs 2,0,2,16, CH_PD and RESET, and also 4.7kOhm pulldown for GPIO 15. The ESP8266 boots and works fine. Would it be okay for a long shot? Should I use ...
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