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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.

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How do I connect an accelerometer (GY-521) to a SparkFun Thing Dev (ESP8266)?

All of the wiring diagrams I've found for wiring up a GY-521 accelerometer to an Arduino have looked something like this: I've read in several places that it needs to be connected to A4 and A5. I ...
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27 views

Cant sent POST request to server with NodeMCU

I just programmed NodeMCU to Post HTTP request to a PHP script on my localhost server(wamp2) worked fine. After 2 days, again tried to post request does not work. Where the NodeMCU serial monitor is ...
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16 views

How can I use MySQL_Connector_Arduino library with localhost xampp?

Question is odd, but I want to know how the MySQL_Connector_Arduino library can be used with localhost xampp/wamp, not with a MySql Server, preferably with an example.
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1answer
43 views

Communicating with a 12V device?

I'd like to connect a 12V access control device to the Arduino, but I lack the understanding. How can the signals from and to the device be done when they have different voltages? I am afraid ...
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1answer
18 views

ESP8266 WebServer not responding (connection time out)

My web server running on ESP8266, stop working after while. I cannot connect to it - browser shows connection time out error. No error, no crash... nothing. Have you any idea how to fix it? My code: ...
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1answer
14 views

How to access a website running on my localhost(host/server) to Serial Monitor using ESP8266(Client)?

The following source code is from the official ESP8266 website(Explanation provided): https://arduino-esp8266.readthedocs.io/en/latest/esp8266wifi/client-examples.html This .ino code returns the html ...
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38 views

How can I connect multiple different sensors that uses the same pins?

I'm doing a project on Arduino Uno and it requires me to connect 3 different sensors together: Waveshare 2.9 E-paper, MFRC522 RFID Reader and a ESP8266 wifi module. problem is, The e-paper and RFID ...
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14 views

ESP8266 connection to microcontroller [closed]

i want to use esp01 with micro controller i want to flash esp with code to connect specific WiFi and make server but sent codes to micro controller via TX pin any help???? thanks
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1answer
59 views

Connecting wires and coding in GPS Module GY-NEO6MV2 with ESP8266-01

Here is the link : https://www.circuito.io/app?components=10167,11021,12083,13678,13959,975601 I'm just a beginner I don't have the idea on how GPS module wires should be connected #include "DHT.h" #...
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1answer
31 views

Arduino Uno with ESP8266-01. Is that any alternative way to connect Arduino Uno to Wifi [duplicate]

I have bought an ESP8266-01 Wifi module last month, and I am trying to connect Arduino Uno to network so that I could connect to the MQTT broker. However, I failed to upload the sketch/communicate ...
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28 views

Board Updating problems

I have updated Arduino AVR Boards in IDE and before I updated, ESP8266 boards were working, now after I updated, it says "Error downloading "URL for esp"" and no matter which website I listed inside ...
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1answer
22 views

Unable to get output on Arduino serial communication with ESP8266 and M6E RFID reader

I am unable to get the output on NODEMCU serial. NODEMCU is connected with Arduino Uno, and Uno is connected with M6E Nano RFID reader. Currently I am unable to understand that am i doing any mistake. ...
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1answer
28 views

ESP8266 is not responding to AT commands and showing mem_failed on every code [duplicate]

I was using Arduino Uno with ESP8266-12E. Today I was reading an article to blink LED using Webpage. The code wasn't uploading so I connected all the pins connected to 3.3V to 5V. Then the code was ...
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1answer
23 views

ESP8266-12F accelstepper wont boot

If I use 9, 10, 7, 6 , 8, 11 pins for accelstepper, ESP8266 wont boot If I use other pins, all good. What is the problem? I use accelstepper and Arduino latest versions. sketch which won't boot - ...
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28 views

Lora SX1278 fails(sometimes) so what other communication method can I use [closed]

I am developing a cheap solution to traffic control system. It will be semi Automatic Remote Controller. Right now I'm using Lora communication. 5 Lora module SX1278. One of them will be used as a ...
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1answer
19 views

Synchronous communication between two Arduino boards using two ESP8266 modules

I am trying to establish communication between two Arduino boards to send data from sensors through a WIFI module. The problem is that I need them to connect to each other whenever they are in range ...
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1answer
44 views

I have the code printing the data I need but don't know how to connect the data on ESP8266 IP web server

#include "DHT.h" #include "NewPing.h" #include <SoftwareSerial.h> #define DEBUG true SoftwareSerial esp8266(11,10); #define DHTPIN 2 // DHT-11 Output Pin connection #...
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1answer
30 views

ESP8266 GET method error

I am working on ESP8266 and I want to send a GET request with AT command to my localhost but I failed every time. Can you help me solve this problem please? Thank you for interest! I attached my ...
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1answer
33 views

Running ESP8266 at 3.78V to work with ATMEGA328P at 16 MHz

I have a project that is powered by 2x 18650 battery and feeds it to a step down switching voltage regulator that is configured to give a steady output of 3.78V to both esp8266 and atmega328p. The ...
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0answers
29 views

Do we need resistor for esp8266? [closed]

Do we need resistor for esp8266?? Me and my friends have a project using arduino, since we are a beginner could you tell us what we need to understand arduino
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31 views

Connect an Arduino to a private WIFI with credentials

I know that an Arduino can be connected to private WIFI, I mean with SSID and PASSWORD, but I want to know if can be connected to a private WIFI with credentials, with SSID and after USER and PASSWORD....
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1answer
15 views

Global Variable does not Change when Value is set within Boolean Function

I have a boolean function which contains a string. In my main project this string is extracted from a website using an ESP8266 which is compatible with the Arduino IDE. I need to convert this string ...
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25 views

How much time it would take for an Arduino/(Node-MCU) to reach the setup()

I'm designing a circuit with a soft latch power switch IC. It requires to pull up one of its pins to HIGH between 512 ms time window after powering up. Can an Arduino or ESP8266 handle this task? If ...
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1answer
93 views

Arduino Uno with ESP8266-01 with AT [closed]

Here is the schematic I followed: Here also the link: https://www.circuito.io/app?components=10167,11021,12083,13678,13959 #include "DHT.h" #include "NewPing.h" #include <SoftwareSerial.h> #...
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1answer
17 views

using esp8266 feather to burn bootloader on redboard

Is it possible to burn the bootloader of an arduino redboard using an esp8266 feather? whenever i connect my redboard to my pc the ports list on the ide would just be greyed out. I've looked around ...
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2answers
47 views

NodeMCU does not connect to wifi

I'm trying to connect my nodeMCU to my WiFi network but it keeps printing ........ which means is not connecting to the network. Here is my code used to connect to WiFi. Any reason why it isn't ...
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1answer
43 views

DHT22 need pull down/up ESP8266

I have the strange pb. My esp8266 was working fine with my DHT22 and then failed every time. I loaded an example sketch in a other ESP8266 and I have the same pb.... until I shut down -> up the DHT22 ...
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1answer
32 views

ESP8266 Peer to Peer with AP and STA - Cache AP Clients, Flush Their Requests?

I'm fairly inexperienced with Arduino and entirely new to networking, so bear with me. I've programmed a couple of NodeMCU devices to communicate the use of an instrument via activation of an LED. I ...
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1answer
34 views

Websockets with the ESP8266 using arduino uno board

I'm trying to make an iot device that connects to my wifi, establishes a socket connection with my golang backend and then starts to send sensor data from the ardunio. I've got an ardunio uno board ...
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45 views

How to send data from ESP8266 NodeMCU to MySQL Database using MQTT [closed]

How do you send the sensor data from esp8266 nodeMCU to MySQL Database using MQTT Protocol, i have seen alot similar guide online but can't seem to understand them. I am using a simple weight sensor ...
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2answers
56 views

How to interface ESP8266-01 Wifi Module with Arduino Uno

I have an Arduino Uno and ESP8266-01 Wifi module with me currently. So I'm going to use ESP8266 to connect to the MQTT broker to allow me publish data to other devices. However, I have a problem with ...
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2answers
31 views

ESP8266-12E as WiFi interface for Arduino Mega

I have an Arduino Mega 2560 that I would like to connect to the internet using an ESP8266-12E. Searching the internet for relevant keyphrases only yielded one type of result: The articles all explain ...
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1answer
37 views

ESP8266 - Sending a software Reset Command

I have an ESP8266 running an Arduino code to control a dual relay device ( Up, Down, Off ), both from a physical switch and MQTT commands. After mounting the device in place I have no access in case ...
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1answer
25 views

NODEMCU 1.0 HX711 Load cell reading weird text

Hi Guys! i have a problem with the reading with my NODEMCU where i tried this code on an arduino UNO it is working perfectly fine but until i tried to switch it to NODEMCU 1.0 which have a wifi ...
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0answers
24 views

ESP8266WebServer Remote Opens Port but fails to load web page

I have a modified Sonoff basic (ESP8266) that I use as garage door openers. Using Arduino 1.8.7 and 2.4.1 libraries I created firmware that allows the door to be opened and closed via an AJAX enabled ...
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30 views

Hook up 2 HC-SR501 PIR's to Wemos D1 mini [closed]

I have two HC-SR501 PIR's I'd like to use to detect motion and light up a 12V LED strip when motion is detected (each PIR is assigned a LED strip). I am, however, unsure on how to hook them up to my ...
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3answers
90 views

Unexpected accident of my board, CH341 issue for Linux or Dead ESP?

I have early midnight accident of my Lolin/Wemos boards. I tried uploads my sketch with a assembly VIN to GND as my reset button, when i uploads my sketch at more one hundred times, i get my boards ...
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2answers
54 views

Circuit diagram for ACS712 and ZMPT101B with ESP8266 using ADS1115

This is probably a cry for help for a circuit diagram which involves connecting ESP8266 with ADS1115 with ACS712 and ZMPT101B(voltage sensor). Since both of them uses analog pins, and using a diode ...
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0answers
43 views

ESP8266 two different Clients [closed]

I have been trying to use two esp8266 one as softAP server and another as station client. There will be another device which will be used to give input for example smartphone. So the smartphone and ...
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1answer
55 views

UART connection between Arduino Nano and NodeMCU

I'm trying to create an UART connection between a Nano and an NodeMCU, running MicroPython. Code for trying is meaningless - Arduino says "HI", and ESP8266 should receive and print msg value. ...
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1answer
37 views

Bridging the wifi networks on nodemcu: how to set the esp8266 as wifi extender, simplest case

It seems to me that humidity is getting high in one room in the basement in my house. To monitor the situation temporarily, I would like to build a very small wifi-mesh network to exchange these ...
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1answer
39 views

Are there any Wi-Fi modules for the Arduino Uno that may connect to an external Wi-Fi Antenna?

I have an Arduino Uno I need to connect to Wi-Fi to make HTTP POST Requests to a Raspberry Pi Web Server. The Arduino is located only about 30 feet from the AP, but there is a brick wall in the line ...
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0answers
26 views

Why I can not run a mesh network by ESP8266-07?

I want create a mesh network by 15 ESP8266-07. How to connect them together and how can I send a message from one of them to an specific node? I have read about Wifi mesh and easy mesh and painless ...
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26 views

DIY Light Switch Trouble Shooting Help

Goal of the Project: DIY method of a smart light switch Process Used: Implement using IFTTP with: BLYNK Google Assistant NodeMCU (ESP8266 WiFi) High Voltage Relay Samsung Wall Wart for NodeMCU ...
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33 views

Why is the excecution stuck at AT+RST in ESP8266 interface with arduino uno?

MY code is #include<SoftwareSerial.h> SoftwareSerial Serial1(2,3); //make RX arduino line is pin 2, make TX arduino line is pin 3. SoftwareSerial gps(10,11); #include<LiquidCrystal.h>...
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0answers
17 views

Interfacing MSP8266 with Uno causes loss of USBTTY access

I am fairly new to the Arduino family and have been trying to interface the Wifi ESP8266 module with it. I am trying to use the Uno board as bridge between the computer and the WiFi module (so that I ...
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1answer
47 views

Arduino UNO + ESP8266 WiFi Relay by LC Technology

I have Arduino Uno, and recently obtained ESP8266 WiFi Relay by LC Technology. I tried to look up some information about that on the net, but all the answers / suggested solution didn't work for me. ...
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1answer
27 views

esp8266 + octocoupler relay: WDT reset when using AC current

I'm trying to switch on bulb via 4 channel 5V optocoupler relay controller from ESP8266 using WIFI Access point. All my connections looking fine and i can able to connect WIFI SoftAP and send signal ...
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40 views

How to access WIFI from GSM 800 for NodeMCU 8266

In my project, I used NodeCU8266, for the internet purpose I need to connect WIFI with ESP8266. However, I don't have WIFI, but I have a GSM800 module. So with the help of GSM800 how can I connect the ...
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1answer
27 views

ESP8266 + HC-05 on same arduino

I'm absolutely new to arduino, so please excuse me if this is a noob question. I want to use a ESP8266 esp-03 Wifi module with a HC-05 bluetooth module together with my arduino uno. Unfortunately ...