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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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12 views

controll intigers from webserver on nodeMCU esp8266

I would like to controll neopixel leds from over wifi with my nodeMCU but i dont know how to controll values over wifi, through a web interface would be perferable over url, but that also works. usinf ...
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1answer
60 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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1answer
64 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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1answer
87 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
75 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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1answer
33 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
51 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
31 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
60 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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1answer
35 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
48 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
53 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
44 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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1answer
19 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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1answer
133 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
40 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
221 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
99 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
62 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
59 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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2answers
101 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
149 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
151 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
59 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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3answers
97 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
195 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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1answer
128 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
79 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
56 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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28 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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0answers
30 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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0answers
19 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
159 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
43 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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1answer
74 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 ...
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2answers
110 views

Difference between 3.3v & 5v

Im quite new to arduino in general and i'm sorry for the beginner question. could someone explain what the 3.3v and 5v on boards do? I know their voltages. but can you run one on the other? whenever ...
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1answer
60 views

How to HTTP post a data to Node express API from a Arduino esp8226?

I am HTTP Posting a data to web api https://morning-cliffs-85779.herokuapp.com/api/users from a arduino connected to esp8226. I am using wifiesp library to HTTP_POST a data. The REST apis are hosted ...
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2answers
302 views

Wake up ESP8266 from deepSleep with a button

I have a button with two isolated tracks. I want to be able to wake up esp from deepSleep with this button, and also detect that it was clicked. So i can't connect it to reset, because esp won't work ...
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1answer
22 views

ESP8266 - 12F High consumption in led blink (with pictures)

My esp is consuming 180mA with a led blink. The same consumption happens when I put it in WIFI_STA mode with the WiFi.mode(WIFI_STA); function. What should I do to reduce consumption? Used AMS1117 CI ...
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53 views

What are the specific pins to connect the following : DHT 11, ULTRASONIC SENSOR, ESP8266 and arduino uno? [closed]

I researched a lot on how to connect this devices to each other to get the data from ultrasonic sensor and DHT11. But it wasn't clear on how I will connect the devices on their pins. I found one ...
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3answers
270 views

How to post data to database using nodeMCU?

We created a website hosted by 000webhost and we're trying to post data from our nodeMCU to the database using the sketch below, but the database doesn't seem to show any received data. How do you fix ...
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1answer
116 views

reduce power consumption for esp8266 in access point mode

esp8266 acting as a access point , question is how to reduce power consumption in this case? I don't think i can use sleep modes here in this case.
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1answer
203 views

ESP8266 - One server sending data to multiple clients

I have a few arduinos with ESPs, one of which is set up to measure temperature, and I'd like to have it send commands to other connected arduinos to perform various functions (open/close valves etc.) ...
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1answer
124 views

My verbose appears “unable to cache built core”

At early morning i have accidentally the error of GNOME for my OS, so I was forced reinstall my OS couse i don't have any backup for my packages and my database. i'm installed Arduino-IDE 1.8.7, ...
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1answer
99 views

ESP8266 Software serial to ATmega 328 is not properly working

Thanks in advance.. We are having esp8266-12E chip and Atmega328 connected as follows, ESP 12 pin as Tx,13 pin as Rx && Atmega328 13pin as Rx, 12pin as Tx. Everything works fine, but while ...
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1answer
29 views

ESP8266-01S Stopped responding after second launch

Here's the code: #include <SoftwareSerial.h> #define RX 6 #define TX 5 String AP = "..."; String PASS = "..."; SoftwareSerial esp8266(RX,TX); void setup() { Serial.begin(9600); Serial....
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1answer
93 views

ESP8266 upload data to google cloud platform

I am trying to upload information to my appspot created with Google App Engine. I am able to do it when I in my browser type: http://myname.appspot.com/query?city=Copenhagen&temp=20&id=website ...
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0answers
60 views

HTTP GET fails from ESP8266 to Emoncms

I've tried the code with emoncms.org as well and the results are identical; one parameter posts fine, but when I include the second parameter in the JSON I get HTTP 400 Bad Request from nginx and I'm ...
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1answer
64 views

Using Arduino UNO for uploading a sketch to the Espresso Lite v2

I am trying to use my Arduino UNO as a programming interface to load sketches on the Espresso Lite v2. I followed the instructions to setup the Wifi network (long press gpio13 and the AP thing), but ...
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1answer
85 views

DIP switches on RobotDyn Uno+WiFi

There are theses 8 small pins on the Uno+WiFi board. Can someone please give me a detailed table or something on the settings of these 8 DIP switches? I'm sorry if this question has already been ...