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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Can too much power consumption cause NodeMCU to trip?

I made a home automation setup that involves a NodeMCU and a 5v relay module. Now, this setup automatically disconnects from the WiFi randomly. It sometimes connects immediately, sometimes it takes ...
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Same software on single ESP-12f slower than on NodeMCU

I have programmed a small software to control an LED strip using an esp. I've written a web app which sends a request to the esp which then applies the color. So far everything works, but I've got a ...
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Which of the ESP8266 alternatives allows for full packet capture/injection in promiscuous mode?

I am part of a product group that is developing a low cost wireless intrusion detection system, for home usage. We have already produced and delivered to market ESP8266 based product however for the ...
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32 views

Connect Arduino and ESP8266 NodeMCU

I want to connect multiple sensors and see their measurements via ESP8266 Web Server. But, the problem is that ESP8266 has only one analog pin and I can't connect multiple sensors to it, so i need to ...
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error: espcomm_upload_mem failed

I use a Macbook. Currently 3 usb ports appear, but I'm getting the error in the topic header. What should I do? I think the usb port was not installed correctly. I'm using the Esp8266 circuit board. I ...
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198 views

Blynk.Begin(auth, ssid, pass) causing watchdog reset

I am trying to follow this tutorial and I keep hitting a problem repeatedly. I checked in my code that every time it hits the line Blynk.begin(auth, ssid, pass);, the serial monitor shows me that ...
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62 views

I need to connect Arduino uno with esp-01 and relay control via Android application

I have trouble connecting to esp8266-01 through arduino uno and controlling relay via Android application or a local web server. I did a lot of research. I do not want to use esp-01 independently. ...
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187 views

MAX7219 Does Not Light Up Using Wemos D1 Mini ESP8285 Lite

This is my first time posting, so I apologize if this is in the wrong place. I'm trying to build my first Arduino project that shows monthly revenue from Stripe's REST API using a Wemos D1 Mini ...
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1answer
48 views

How to read a specific amount of data via serial?

I'm trying to send data via serial from my Arduino nano to my ESP. Its an integer from 1 to 4 digits so something like 0, 13, 1234, 123, ... Every thing works fine but when the data comes too fast it ...
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43 views

i have a problem with mdns i'm using an ESP8266

I am working on a project on which I have to drive a DC 12V motor. I use an ESP8266 I manage to manage my engine remotely but my only problem is the mdns I use the mdns but it does not work. when I ...
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58 views

ESP8266 WiFiManager never manages to AutoConnect?

Running through examples of WiFiManager, and trying to incorporate the code into my own, it seems that WiFiManager (either version) never manages to connect using saved WiFi information. Starting my ...
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69 views

Is my esp8266 is broken?

I am trying to use esp8266 with Arduino UNO. I connected the wired as this I even tried switching the tx->rx / rx->tx and I used this code: // RemoteXY select connection mode and include ...
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139 views

ESP8266-01 is not working and it's hot

it has been so long since I tried to connect the esp8266 through Arduino Uno and get it to work my goal is to send data from the Arduino Uno to web site, I have tried everything and a lot of codes but ...
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19 views

Error Starting SPIFFS

There is a problem running a simple SPIFFS file system code on different versions of the Arduino IDE, as code shown below. In Arduino IDE version 1.8.4, works fine. No longer version 1.8.9, can not ...
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313 views

how can i send get and post request from esp01 using arduino uno

I am using an esp8266 01 module with the Arduino Uno to establish a communication between the Arduino and my web site. I actually don't know how to send Rest HTTP requests from the Arduino to get data ...
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354 views

How to Insert Data in Arduino's Direct Mysql

As inserted in a Arduino Mysql Direct Tablela I'm new to Arduino and would like to know how to do something in the code to make a copy in the database This code to pass the RFID and authorized ...
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71 views

How to send and receive data over LAN from an esp8266 operating as a station?

I have an esp8266, I have an led connected to one of the GPIO pins, I want to be able to control the state(high or low) as well as request the current state of the led from my computer which is ...
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29 views

Serial monitor garbage output on both MacOS and Windows devices, output used to make sense

Baud rate is set to 115200 in both the serial monitor and in the setup() portion of the code. The output to the serial monitor just looks like a bunch of reverse question marks on MacOS and on Windows ...
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28 views

Showing GPS Values on I2C LCD using Arduino and ESP8266

I am working with Arduino. I'm using 2 Arduino boards along with 2 ESP8266 modules to transfer data from one Arduino to another Arduino. I want to transfer GPS values from system 1 to system 2 using ...
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32 views

Error with AT+CIPSEND in ES8266 with arduino

I'm making simple web-server on esp8266 module connected to Arduino. And when +IPD,0,GET... I'm sending AT+CIPSEND=0,16. Then I write HELLOMYDEARFRIDE. It says : send 16 bytes recived. OK. But in ...
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84 views

Creating WebServer ip:port on esp8266 module

I creating Clever House with wifi. For this I'm using ESP8266 as module connected to Arduino. They communicate with SoftwareSerial. And there's a problem with global webserver on ESP8266. That I think ...
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342 views

How to prevent FirebaseArduino's Firebase.failed() from returning true?

I have an ESP8266 receiving a stream from a firebase value. The value determines the state of an LED output D0. The stream works for the first few minutes after hard reset but Firebase.failed() ...
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80 views

ESP8266 webserver does not return latest HTTP response

I tried getting a HTTP response from an ESP8266 which is in HTTP server mode, I am getting a response but not the latest one, response is always one command previous to that of my request to the ESP. ...
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60 views

Communication between IP camera and ESP8266

I'm working on IoT project. The part of it is about taking photos automatically basing on some sensor data. I have searched on Google but I couldn't find the information I need. Is it possible to ...
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317 views

Chip sync error while updating ATfirmware in esp8266

I find trouble updating my firmware with esp8266 with following error message. [espDownloader.py][line:351][ERROR]: Chip sync error: Failed to connect to ESP8266: Timed out waiting for packet header [...
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37 views

How can I control a slave ESP8266 from a local server and also from another ESP8266?

I have a power strip with a ESP8266 which is supposed to turn it on upon command from a OpenHAB server, or to stay on for a predefined time upon command from another ESP8266 (serverless). The reason ...
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21 views

Is there something I can add to my ESP8266 script to track how much data it uses on WiFi?

I want to set it up on a mobile hotspot but I'd like to get an idea of how much data my sketch uses first.
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119 views

HTTP and HTTPS server at the same time

I'm trying to set up a HTTP and HTTPS server at the same time on an ESP8266 NodeMCU V3. The compiler however doesn't accept any other name than client otherwise no new clients will be catched. But ...
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130 views

ESP8266 reboots instead of completing HTTPUpdateServer update

I should first note that I have made some minor changes to the base code that is used by that library, instead using it as a reference. Basically, turning off unwanted actions during the update and ...
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47 views

More about Problems with using esp8266

I'm running a project under https://www.youtube.com/watch?v=2AL7HfiRlp4&t=23s I encounter a problem with "deadly error: ESP8266WiFi.h: No such file or directory", the code indicates '' #include ''...
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ESP8266 does not detect WiFi networks

I have an ESP8266-12E, I used it previously and it worked fine (approx 2 years ago) I can't seem to get it to detect WiFi networks or appear as an Access Point I can upload the blink sketch and the ...
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138 views

Can´t load a program into my ESP01 using an ArduinoUno

This is my problem, I´ve been trying to load a program(any program) into mi ESP01 and because I do not have the usb adapter, I decided to use my Arduino Uno to do the work. This is my first time ...
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125 views

Trouble uploading code to ESP12 with CH340g

I have a programming circuit for the esp12(see attached) enter image description here I have produced a pcb using this circuit. Upon plugging the pcb into my pc via the micro usb, the pc immediately ...
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333 views

Driving a stepper motor using ESP8266

I have a stepper motor, and a Uln2003a stepper driver, which is connected to an ESP8266. The ESP8266 is powered via USB, and the stepper motor is powered via the driver, which is then powered by an ...
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151 views

Can't connect my ESP-12F to WiFi with my Arduino Uno

Recently I bought this wifi adapter for my IOT projects that I connected to my arduino uno that seems to not working. I have tried with the arduino ESP8266WiFi library with RX connected to pin 0 and ...
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59 views

ESP8266 remapping or UART boot

I am trying to make an DFRobot Wifi Bee sleep periodically. The first run executes fine, but after the wakeup a lot of gibberish is shown in the serial monitor. I changed to baud rate to 74880 to see ...
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36 views

ESP8266 accepts commands but returns nothing

I've been struggling for a couple of days now with the module ESP8266. I have tested it already with another Arduino (RX-RX / Tx-TX) and I could send some test commands and receive the corresponding ...
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111 views

ESP8266 http.get() issue due to wifi authentication failure

Facing a weird issue while reading data from esp8266. I am trying to read dynamic data from a demo text file on test server on same network in deep sleep mode. Case1: Joining new network I am using ...
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45 views

Using Arduino Motor Shield

I'm looking to create a blind controller and have set up the hardware and software as I think it should be. I had the software working fine using an IC motor driver, but as I am no great at soldering,...
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341 views

MQTT subscribe callback fails to be called in ESP8266 deepsleep mode

Refer to ESP8266 deep sleep and MQTT I executed the code in the given link. However i am not able to receive the subscribe message that are send from MQTT test broker(MQTT Lens) on the serial ...
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151 views

What firmware on ESP-WROOM 02 and how to change to AT firmware?

I just received a Wemos board with an ESP-WROOM 02 on it. I connected it via USB to my Windows PC and launched PuTTY. I set the baud rate to 74880 and the correct COM port. I pressed on the reset ...
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57 views

Serial monitor error message

I connected my ArduCam mini to es8266 board and opened serial monitor. Then this message appeared. It started to appear continuously. I used the code in examples "functions of ov2640". What does it ...
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103 views

Send data to API from Arduino with ESP8285 Strange Error

I have an Arduino with few sensors, and I want to send all of data to my API over ESP8285 what is connected to the wifi. Its almost working fine, except one thing. I have these AT commands: String ...
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581 views

ESP8266 print DNS address (obtained via DHCP)

I've set up an Arduino Clone (Wemos D1 Mini) to get IP-information via DHCP. Everything works fine and I can print the information : Serial.print(WiFi.macAddress()); Serial.print(WiFI.localIP()); ...
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35 views

Unable to interface using Softserial with ESP8266 and Arduino uno

I am trying to use a ESP8266 in an Arduino project, but I'm unable to get the basic Software serial interface working with it. I have the ESP connected to a secondary 3.3v power supply. When ...
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25 views

Arduino firebase issue code uploaded but no any responce on firebase

I have uploaded example code in Arduino for FirebaseDemo_esp8266. but not getting any reponce on firebase window. plzzz help me to fix this issue...
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16 views

nodeMCU - when DC is active on pin the do this

i have a nodeMCU v3(esp8266) and what i want is: when i send DC 5v or 3v to a pin=D1 (idk if its possible to send 5v directly to pin) then to activate the D0 for 20Seconds like this: if (D1==Sends ...
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51 views

Is it possible to send data at 100Hz using Wifi bee ESP V1.0 to Mobile (Xamarin)?

Im currently using WifiBee ESP V1.0 and Lilypad Arduino as well as AD8232 for ECG. We are trying to send the data to mobile phone by connecting to PubNub.` if(Serial.available()>0){ str = Serial....
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246 views

RS256 JWT with Arduino

I am working on a project where I am implementing JSON web tokens to validate devices on a server. I have been unable to find many resources related to RS256 JWT with Arduino or similar devices. ...
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162 views

Problem interfacing both esp8266 and EM18 with Arduino Uno

I have connected esp8266 with Arduino Uno and programmed 8266 with Arduino IDE to send data to firebase over WiFi. Now I also want to interface EM18 RFID Reader with Arduino in order to read the RFID ...

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