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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ESP8266 and Python Communication

I'm new to networking and working with ESP8266. I have successfully setup my ESP8266 and can program it from Arduino IDE (tested a blinky code). I want to send some data from a Python script running ...
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ESP8266 - AP+STA mode not working properly

I'm trying to have an ESP8266 ESP-12 to serve as Access Point and Station at the same time, delivering the same webpage in both cases. This is what I have: #include <ESP8266WiFi.h> #include <...
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Arduino Uno, ESP8266 HTTP request have no response

Firmware version AT+GMR AT version:0.21.0.0 SDK version:0.9.5 OK Connection ESP8266(ESP-01) <> Arduino Uno GND <> GND 3V3 <> 3.3V EN(CH_PD) <> 3.3V TX <> ...
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WifiEsp client TIMEOUT when put on a loop

Hello I have been using the WifiEsp to send and receive data from Thingspeak. All is well until I put my http request on the Void Loop() section. My Goal: I want to receive data every loop not on ...
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Why isn't ESP8266 connecting to wifi when calling yield()?

I'm experimenting with ESP8266 and I want it to cycle through various states: LED on/off, WiFi on/off and measure the connection time, deep sleep. I wrote the following script, using millis() to ...
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238 views

ESP8266-01 system param error

I'm using esp8266-01 connected to arduino nano. Every time I tried to upload code to the esp8266 chip I get this error in the serial monitor: system param error 56 45 52 31 00 00 00 00 ff ff ff ...
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Digital Vibration sensor on NodeMCU ESP8266

First Post. I'm using a NodeMCU esp8266 connected to a digital vibration sensor. My project is to detect when a pager vibrates to then trigger through the maker channel of ifttt an outcome. I'm ...
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1answer
199 views

Format error with ESP8266 compile

I get this error when I try to compile and upload the code for the ESP826612E fork/exec /home/c/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/1.20.0-26-gb404fb9-2/bin/xtensa-lx106-elf-g++: ...
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Can upload programs to ESP8266 with Arduino Nano but not run them

I am trying to use my Arduino Nano to program my Generic ESP-01 Module. I want to use the module to control an RGB LED Light Strip but am not having much success, only errors.... These are my ...
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ESP8266 library / function for IR remote control

I am using IRremoteESP8266 for reverse engineering Hitachi AX-M76E mini stereos IR controller. I want to read the signal that the remote sends and send the same hexas to the stereos with IR led. ...
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749 views

Make RFID Tag as a variable

I want to make RFID Tag as a variable, and push it to the web server. But I struggle to do the Serial.read function. Any solutions? Here is my code #include <ESP8266WiFi.h> #include <SPI....
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Can't send AT comands to ESP8266 on any baud rate

I have problem with baud rate. I have changed baud rate of esp from 115200 to 9600 with AT command AT+CIOBAUD. And everything worked fine until I wanted to change it back and executed command AT+...
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ESP8266 sometimes stuck on AT+CIPSEND with “busy s…”

I'm using an ESP8266-01S Wi-Fi module on an Arduino UNO. When I use AT+CIPSEND=4 and then type test it successfully sends that message to my laptop. However, sometimes the module returns a busy s... ...
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My ESP8266 01 is saying at espcomm_sync failed, espcomm_open failed, and (2x) espcomm_upload_mem failed. OS X

I'm extremely frustrated at my ESP8266 right now, with the Arduino. I am using a 6v DC battery power supply (4xAA batteries), and a 3.3v voltage regulator (NTE1904). I have the connections as shown: ...
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433 views

Can't Flash ESP8266 latest firmware, says “Fast Flashing error” and "Invalid head of packet(' ')

I can't figure out how to flash the firmware found on http://www.electrodragon.com/w/ESP8266_AT-Command_firmware. I am using ESP8266 Download tool v3.4.4. When I am adding a firmware in download path ...
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386 views

Connection between Arduino Mega 2560 , ESP8266-12F , PCF8574

Another start for achieving something new , I want to connect ESP8266-12F , Arduino Mega 2560 Board And the PCF8574 I/O Expander (I can use MCP23017 also) together , Where ESP8266-12F will take ...
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381 views

Why does my ESP8266 making an HTTP request to an MDNS responder keep getting redirected to my ISP's search engine?

I have two ESP8266's trying to talk to each other, a 'host' and a 'client', if you will. I have the ESP8266mDNS.h responder running on the host at esp8266wifi.local. On sending an http GET request to ...
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665 views

Arduino Mega + ESP8266 - Post Data to website issue

I'm trying to post data to my SQL database and it seems that I'm not sending the data correctly. My PHP file is working since I have tried it and it writes to the database. I am getting an esp.find("...
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2k views

How to define SoftwareSerial pins on ESP8266

I'am new to arduino yun and ESP. In fact, i have an arduino yun which has a sim808 dfrobot shield on it which uploads GPS data online at a regular time interval. I want to connect the dfrobot sim808 ...
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1answer
2k views

Load website from SD card

I combined two different codes together, a captive portal and a SD card web server. I encountered a problem which the website in the SD card doesn't load when I connect to the AP (captive portal page)....
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WiFiManager autoconnect after timeout

I like to configure my ESP8266 with WiFiManager. After each power cycle, the config portal should open and wait for a new configuration. If there is no new configuration entered, WiFiManager should ...
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271 views

ESP-12f SoftwareSerial read fails

I am trying to use esp8266 version of SoftwareSerial, espsoftwareserial, on an esp-12f. If I initialize an object using: SoftwareSerial gpsSer(14,12, false, 256); or SoftwareSerial gpsSer(12,14,...
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592 views

AT+CIPSEND command closed the connection automatically

I don't know why CIPSEND command closed the connection after sending done without CIPCLOSE command. Is it normal? If I want to keep the connection, what should I do in this case?
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Esp8266 not working

I connected all the pins as in datasheet, except ch_pd. But when I connect ch_pd to 3.3 V , the red light on esp8266 goes dim. I used 3.3 V, 250 mA power supply. What is the reason for this?
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861 views

Exception 29 ESP12E Arduino

I am getting exception 29 every time I make request to HTTP using GET function. I am requesting HTTP every 20-30ms but using millis I am only reading request at 100ms in order to avoid any overflow or ...
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786 views

ESP8266 only responds to AT and AT+GMR

I purchased a pack of esp8266 (https://www.amazon.com/gp/product/B00PA3UQNI/) and a usb to serial converter (https://www.amazon.com/gp/product/B01FUA2BBU/) from amazon. I hooked them up and attempted ...
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Arduino Wifi/Wemos Wifi D1 adding &t=0 to simple GET request

I'm attempting to make a simple get request to my website from my arduino, but I'm unable to do so. I keep getting the following error: <html> <head> <meta http-equiv="refresh" ...
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Programming an Arduino over the air using an ESP8266

This question stems from this article (Originally in Spanish/English) which Hack a Day summarizes (Includes link to partial English translation). These articles show that it is possible to update an ...
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770 views

Error loading Blink sketch in esp01 (esp8266)

I have the esp01 connected the serial port using a usb to ttl serial cable and also using the Arduino UNO as suggested in some tutorials. I can execute AT commands. But loading a sketch from Arduino ...
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925 views

ESP8266 pin multiplexing possible?

I am trying to use Adafruit's ESP8266 implementation for a project of mine, which makes use of a bunch of sensors. The problem I have is the limited amount of pins available from ESP8266: 2 pins are ...
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366 views

Multi-file arduino esp8266 sketch sharing a reference to server

Transferred from stackoverflow on the advice of @Gee_Bee: I can get Writing a Library for Arduino to work as well as Breaking a sketch into multiple files and Classes within Classes - ...
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ESP8266 GET OR POST Request Timeout Error

i am using ESP8266 module serially with PC and i also tried it using uno I am stuck at the following point I am able to made connection to server but when i will send the following command POST /...
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693 views

Is replacing USB serial WITH ESP8266+ESP link feasible?

ESP8266 (01-512k,) Arduino Uno (clone), Arduino IDE, Python 2.7.6 on Macbook pro running OSX 10.10.4 64-bit. Hello! I'm using a motion sensor with the following setup: Arduino Uno+motion sensor >>>...
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Flashing ESP8266

I can't flash my ESP8266 (ESP-01). I have 3.3 V and ground connected, Rx to Tx and Tx to Rx on my USB to serial adapter. I also have GPIO0 connected to ground too. I am using an external power supply ...
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583 views

ESP8266 and Arduino bidirectional streaming from and to a website

I was looking for some easy tutorial on bidirectional communication via ESP8266 connected to Arduino UNO. I want to send and receive strings from and to JQuery based website. However, I couldn't find ...
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257 views

Suggest some ways to communicate (Rx and Tx) between Arduino and LabVIEW through Internet

Suggest Hardwares to use and also suggest some place to learn about IoT, video tutorials, websites, blogs, books etc. Currently I am using Xbees to communicate between LabVIEW and Arduino Mega. Most ...
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Send and Receive with ESP8266 and arduino

Hi i would like to implement a sensor and control system for my home. Basically, i would like to send and receive data to my arduino uno using esp8266. I am able program the esp8266 using at commands ...
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RESTful API with ESP8266 and arduino mega

Anybody had worked with ESP8266 to post data to RESTful web service? I was trying but it's not posting anything. Tried with a test server: http://www.posttestserver.com/ Serial.println("\nSetting AT+...
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Sending file from SD card to android using ESP8266

I came across this post https://stackoverflow.com/questions/10327506/android-arduino-bluetooth-data-transfer where the author sends files from the arduino to android platform over bluetooth. I am ...
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My Computer Doesn't Realize ESP8266 ESP-05 is Connected or not

I wired ESP-05 to my usb-to-ttl as images below. I connected it to USB #2 port, and my computer seems not knowing this. I also tried to send "AT+RST" through Realterm but, it didn't work neither.
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Wifi Data Logger without Delay

I am really new to Arduino so please bear with me. I am running an Arduino Uno with several sensors to capture some data related to a fish tank. Here is basically what it does: Capture data (light, ...
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1answer
957 views

Why wifiManager.setTimeout(60) is not working?

in this code I am using wifiManager.setTimeout(60); so that when it fails to connect to the wifi it should restart. However, wifiManager.setTimeout(60) is not working at all. It get stuck and display ...
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How to prevent flickering relay upon waking from deep sleep using ESP01 board?

I have a cheap ESP01 relay module and am using it with ESPEasy. I soldered the GPIO pin 16 to RST to allow deep sleep and that all works great. However when the unit wakes up the relay flickers quite ...
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OLED display on I2C causes esp8266 to reset

I have connected two temp sensors and an OLED display to a NodeMCU using I2C. When the program reaches the instruction to print the measurements on the display the program crashes and NodeMCU resets ...
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ESP8266-01 WiFiEsp Timeout error

I am using WiFiEsp Library, ESP8266-01 Wifi Module, Arduino UNO and Arduino v.1.8.13. ESP Details: AT version:1.2.0.0. SDK version:1.5.4.1(39cb9a32) v1.0.0. The module is also in AT+CWMODE=1. My ...
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Esp8266 12E is printing random characters whenever I reset the board, not even uploaded a code

I have a nodemcu esp8266 12E board. It's working properly, but whenever I reset it, it prints random characters like ??I%^, even if hasn't a code uploaded in it.
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Calling a localhost php script from arduino

Is it possible to connect arduino uno to call a php script using ONLY an arduino uno board, and an esp8266-01 wifi module.? That is, I lack wifi shield such as node MCU. I just need the setup to call ...
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ESP8266 HttpClient recursive connections to URL to send sensor data

I am developing a project based in Arduino Nano and 2 sensors. In this projects is very important the energy because of the prototype is going to be powered by batteries or solar power. In order to ...
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14 views

ESP01 wont boot when connected to the led strip

have a wierd bug behavior.. i have an ATX power supply witch powers an long WS2812B 5v strip witch is controlled by the https://www.aliexpress.com/item/4000766948879.html Esp 01 and the board... NOW ...
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I'm getting an error while uploading my code to esp8266 via an arduino (FatalError('Failed to connect to %s: %s' % (self.CHIP_NAME, last_error)))

Arduino: 1.8.13 (Windows 10), Board: "Generic ESP8266 Module, 80 MHz, Flash, Legacy (new can return nullptr), All SSL ciphers (most compatible), dtr (aka nodemcu), 26 MHz, 40MHz, DOUT (compatible)...

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