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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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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253 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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69 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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51 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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250 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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33 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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20 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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82 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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114 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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43 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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58 views

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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125 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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101 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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283 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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123 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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54 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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34 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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105 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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38 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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284 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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109 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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100 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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459 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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33 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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44 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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208 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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132 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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44 views

How to connect the following ESP8266MOD to Arduino Mega?

I am trying to connect the following ESP8266 to Arduino mega. However, I am unable to find the specific connection sheet for the same. Can anybody suggest the same?
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251 views

Where this function is defined?

This is the code for timer example in esp8266..(got from a website) My doubt is where the function timer1_enable(TIM_DIV16, TIM_EDGE, TIM_SINGLE) is defined ?? I am look in Ticker.cpp, but not ...
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77 views

ESP8266 crashes when button is pressed

I'm building a wireless QLab Go button based on an ESP8266-01. There is a web UI to connect to a wireless network and setup the IP address of the computer running QLab. When a button is pressed, the ...
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105 views

error for uploading code to esp8266 module

I am getting error for uploading code to esp8266 module. I have installed cp2109 drivers also but at the time of uploading getting follwing error message: Sketch uses 344,292 bytes (32%) of program ...
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58 views

Self-initiated Factory Reset of ESP8266 to load known-safe sketch

I am creating a project that uses an ESP8266 in a situation where I can never access it again (will be given to someone else) once completed. I am adding in OTA firmware upload methods (based on the ...
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192 views

ESP8266 BearSSL performance

I am playing with a minimal https server on an ESP01S, using BearSSL::ESP8266WebServerSecure. With 2048bit RSA keys it takes ~5 seconds to serve a "hello" request. Using 256bit EC keys it takes ~2 ...
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35 views

How to send data to PC/app from sensors connected to Arduino

I want to send data in real-time from the sensors connected to my Arduino project to my PC or Android app. I would like see any real-time changes detected by the sensors as a graph on the PC or inside ...
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55 views

FTDI 5 V cable: do i need a logic level shifter 3->5 V from ESP8266 TX pin to FTDI RX pin?

I have a 5V FTDI cable and i assume that all the pins are outputting 5 V? I am new to using the ESP8266 (ESP-12F) and i need to connect the FTDI cable to program the Wi-Fi module but the latter is not ...
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71 views

Error while compiling CODE

Hey guys I have run my example with esp8266 2.4.2 version now I'm getting following error while compiling- C:\Users\Shree\Desktop\FirebaseDemo_ESP8266ex\FirebaseDemo_ESP8266ex.ino:21:29: fatal error: ...
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298 views

facing issue while compiling code

This following error message I am getting while compiling: Arduino: 1.6.8 (Windows 7), Board: "NodeMCU 1.0 (ESP-12E Module), 80 MHz, Flash, Disabled, 4M (no SPIFFS), v2 Lower Memory, Disabled, None, ...
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252 views

Interfacing ESP8266 with Wi-Fi enabled GSM/GPRS Module

I need to send Data over the internet from a location where there is no internet hot spot, but there is a mobile network coverage. I need a to interface my ESP8266 with some GPRS/GSM board, that has a ...
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431 views

ESP8266 HTTPS post body request with WifiClientSecure

Is there a way to post HTTPS body request in Arduino esp8266. I am able to HTTPS parameter request with WifiClientSecure library,but is not safe compared to Request Body send in POST.
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534 views

How to do a HTTPS post on ESP8266

I am trying to do a HTTPS post on ESP8266 as shown in Postman below But I keep getting: 'HTTP/1.1 401 Unauthorized'. Can someone please help me with how to build up the headers correctly in the ...
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314 views

ESP12E Soft WDT reset stack trace leads to libraries

Im using ESP12E DevKit v2 (esp8266 wifi module) board for controlling relays and displaying DHT22 temp,humidity on web server. It runs smoothly when the web client is closed but when i leave the ...
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40 views

ESP 8266 serial error

I am using an ESP8266 board and I had it plugged in to my computer via usb. I reached accross the board to press the reset button, and it felt like my finger got stung. The best I can figure, I ...
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458 views

Multiple void loops with ESP8266

I want to run multiple sketches on one sketch. I use the method of multiple void loops. It works but esp8266 take a lot of time to execute commands. void Setup() { setup1(); setup2(); } void ...
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133 views

Can't parse large json file

For a project I've to parse a big json file. Unfortunately it does not work as expected. Here is the json file: { "data1": "...
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185 views

ESP8266 /ESP12F use flash button as input without using loop()

I couldn't find a proper answer anywhere on internet. I want to use the FLASH button as input in the setup() function and do not use the loop() with deepsleep mode (this part comes later). I tried ...
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254 views

Can someone help me to change this code to u8g2

I would like to change this clock to u8g2. It works fine with the esp8266 and oled 128x64. I would start by including the u8g2 library with #include and all display. with u8g2. replace. What else ...
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1answer
359 views

Notoriously unstable ESP8266 MQTT-client

I am doing a project where an ESP8266 receives data from an Arduino Uno and publishes it via MQTT. After a random amount of time, it will stop sending data to my MQTT broker. It might be an hour, it ...

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