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 mDNS not working

Referring this link I am trying to setup mDNS on my ESP8266 but the same doesnt work with sample code #include <ESP8266WiFi.h> // Include the Wi-Fi library #include <ESP8266WiFiMulti.h&...
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25 views

Connect ESP8266 with Android Studio App

Hey guys I have ESP8266 and want to remote control a sailboat with it. Till now it works fine but how is it possible to send continuous data between the Arduino/ESP8266 and my smartphone? If you need ...
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esp8266 wifi/ read serial data with python

I'm trying to read some serial (ADC) data from my esp8266 nodeMCU v3 over wifi using python. I connected the esp on my local wifi and set it with fixed local IP using arduino IDE, but I couldn't find ...
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esp8266 touch screen input [closed]

i need help from experts here, I need to use a touch screen to input information to my esp8266, the information is the Wi-Fi name and password of this WI-FI, right now I put them directly in the code ...
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ESP8266 flasher: Failed to connect

Hey guys I wanted to flash my ESP8266 but every time I use the flasher it say: Failed to connect. I'm using an ESP-01 module. I connected it with some wires so VCC -> 3.3V, GND -> GND, TX -> ...
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esp8266 graph example

I don't understand the gpioMask part of the ESP8266 graph example code. // Indicate which digital I/Os should be displayed on the chart. // From GPIO16 to GPIO0, a '1' means the corresponding GPIO ...
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ESP8266 01 doesn't react after baud rate change

Hello guys I have my ESP8266 connected to my Arduino. Then I typed in AT in the serial monitor. It confirmed this command with OK. After that I typed in AT+UART=9600, 8, 1, 0, 0 which gave me the ...
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48 views

ESP8266: error: 'getLocalTime' was not declared in this scope

I am getting error: 'getLocalTime' was not declared in this scope when I am compiling this code for ESP8266, however works for ESP32: #include "time.h" void gettime() { static int16_t ...
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38 views

Arduino compatible ESP32 and ESP8266 board power consumption at sleep state

I have data on smaller modules with ESP32 and ESP8266, but can't find anything reliable pertaining to the whole board power consumption (current) with 12V input and microcontroller at low power or ...
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41 views

Error in HTTP Get request using Node MCU

I am just trying to integrate IFTTT in my code by using HTTP get request using below code. #include <ESP8266WiFi.h> #include <ESP8266HTTPClient.h> String url = "https://maker.ifttt....
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ESP8266 power loss resilient HTTP OTA update

I'm implementing HTTP OTA updates for my device like this: WiFiClientSecure client; client.setInsecure(); ESP8266HTTPUpdate updater(SECONDS(60)); updater.followRedirects(true); updater.update(...
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How Much mA dropped in ESP8266-01 Work in LiPo Battery if the WIFI function is continuously on

I working on the system where ESP8266-01 should continuously on because I want to get the Wi-Fi function on. In that case ,I can't use the Sleep mode which is given in the Esp8266-01 . So, My Question ...
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Why does my ESP8266 reset after audio sequence has ended?

I am playing some notes, through a Grove speaker module with an ESP8266-12E based NodeMCU. If you look into the code, the loop has a series of sound delays, to produce different notes, however when ...
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I'm looking for the StreamSend.h library for use in Arduino/ESP8266 serial communications using struct [duplicate]

I've come across an interesting yet old article within StackExchange which has great examples of sending structured variables over serial communications. The library StreamSend.h and it's source code ...
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ESP8266 MCU not clearing memory?

I am still new at this. Using Arduino IDE My MCU was working as a web server with HTML code on SD card using the Webserver sketch. After trying to include other inputs it stopped working with "...
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1answer
72 views

Swap Serial pins of ESP8266?

I have designed and manufactured a PCB which contains an ESP8266 (ESP-WROOM-02D) chip with the serial uart pins connected to a 30pin connector. I made a mistake on the layout (first time designing a ...
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52 views

ArduinoJSON - failure when replacing `SPIFFS` with `LittleFS` [closed]

Due to moving from SPIFFS to LittleFS I encounter a problem when reading a file which stored an ArduinoJSON output. The following code works as expected when using SPIFFS but when changing to LittleFS,...
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1answer
104 views

OTA over MQTT for ESP32

Before starting working, I am just researching around how can I achieve OTA over MQTT in ESP32 in using Arduino IDE. The process I understand the esp listen to MQTT messages and then received that ...
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65 views

Error saving SPIFFS on ESP8266 - only after 3rd entry

EDIT1 - This phenomena occurs only after reboot using button or ESP.reboot() I'll try to make my question more focused: I have library that saved log events to SPIFFS. From 3rd entry (in the ...
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What can be the maximum legth of data wires of relay which is connect to node mcu? [closed]

I am working on home automation and now I am installing it. I am giving my relay 5v supply separately but my node mcu and relay board are 20m far so my concern is will there be any problem if the data ...
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449 views

How can I check if my thermostat is on?

I'm working on a project to better understand how my home cooling system behaves. I'd like to produce graphs of temperature in various areas, overlaid with when my existing thermostat turns the A/C ...
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Update the ESP to espduino via NodeMCU Flasher

I am using Cactus Micro Rev2 and I'm trying to communicate with ESP via Mega32U4. I guess I have to update to espduino to be able to program the ESP side. And I don't know current ESP firmware version....
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58 views

Esp8266 LM35 Heat Sensor analogRead Problem [closed]

I have an arduino uno and esp8266 with wifi. I can get data from lm35 sensor when i wire it to arduino uno but i can't get data from same sensor when i wire it to esp8266. I also have a potentiometer. ...
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48 views

Arduino ESPTelnet.h library read data from cmd screen

I am new to Arduino. I used Arduino IDE for upload code to ESP8266 module. I wrote an ATM application on the tiva-tm4c123 board. I am trying to connect to the application from the internet using ...
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77 views

Control relays with ESP8226 WIFI module and Arduino Uno [closed]

I am new with Arduino and I am using an Arduino Uno, could someone help me make this code work or tell me what's wrong with it? I am trying to control relays with ESP8226 WIFI module and Arduino This ...
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44 views

NodeMCU ESP32 as a replacement for my arduino project

I would just like to ask if this microcontroller can power or can manage 2 servos, 2 motors, and 2 hc-sr04 ultrasonic distance sensor combined? Also, does this board come with a bluetooth module?
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How to read wireless doorbell's indicator LED circuit

I have a cheap wireless doorbell. My plan is to include an ESP8266 and power the doorbell from the microcontroller 3.3V output as the doorbell also runs on 3V I specifically chose a model with a LED, ...
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117 views

ESP-01 Chip getting hot after connecting CH_PD to 3.3v [closed]

I am new to esp8266, Sometime when I connect CH-PD to 3.3v, esp chip starts getting hotter and everything stops working this is completely random so I don't know what causing it.
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85 views

Arduino Uno Esp8266 AT commands [closed]

I am trying to send AT commands to esp-01 through serial monitor I have uploaded a blank sketch to Arduino , whatever command I send to ESP I get reply ERROR. After reconnecting esp-01 I got some ...
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40 views

Connecting Arduino Uno's TX pin directly to Esp8266 esp-01

I am new to esp8266 esp-01 and trying to figure out how to use it, in many tutorials on internet, I have seen people have connected Arduino uno's TX pin directly to esp8266 esp-01 without any voltage ...
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How to send data from esp-01 Wi-Fi module to arduino

The L1 is the value i will get from firebase database, but now i wanna send the value that i receive in realtime database to arduino to on LED, how to solve? any suggestion? which mean when arduino ...
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45 views

ESP32 WROOM32 SPI EMF issues

I'm trying to run Waveshare SSD1327 128x128 screen via SPI on ESP32 WROOM32 board. On ESP8266 (D1R1?) it works flawlessly while using HW SPI but when I run it on esp32, anything connected to mains ...
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66 views

Sending Data Between Arduino Nano and D1 Mini

I am sending data from Arduino Nano to D1 Mini, Transmitter is Arduino Nano Transmitter Code: #include <DES.h> #include <SoftwareSerial.h> SoftwareSerial link(2, 3); // Rx, Tx DES des; ...
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46 views

Pass Byte Array to Char and Send to a Separate Arduino

I am trying to send data between Arduino Nano and D1 Mini (ESP 8266 Module) My Code as below in Nano which will be the transmeting , #include <DES.h> #include <SoftwareSerial.h> ...
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87 views

esp8266 analogRead of 5.5V soil moisture sensor input using voltage divider

On an ESP8266 I try to analogRead(A0) my soil moisture sensor using a voltage divider but I get unexpected low values. The MT3608 increases the esp's output voltage from 3.3V to 5.5V which is the ...
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192 views

About Finxing ESP8266-01 ERROR UPLOAD ARDUINO IDE (esptool.FatalError: Failed to connect to ESP8266: Timed out waiting for packet header)

I have one ESP8266 01 and can not write blinking example on it, so I have made the below connection on it based on this video, but I get the below error: Global variables use 27980 bytes (34%) of ...
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57 views

Unwanted Wi-Fi Jamming by ESP8266

I bought an ESP8266-01 module. I attempted to upload following code onto it. void setup() { // put your setup code here, to run once: Serial.begin(9600); } void loop() { // put your main code ...
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35 views

How to get the value of a measurement transmitted by a BLE device?

I would like to use a BLE temperature sensor (such as the Inkbird IBS-TH1 Mini BLE Sensor), however, I want to be able to display the temperature measurements in my own website. To do this I am ...
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46 views

Why when I try to connect my ESP8266 to my node sever in my localhost it keep getting disconnect and connect?

I think the issue is within the library because I have try to implement this code according to the tutorial that I found in YouTube Youtube. The discussion of this tutorial is the first they implement ...
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1answer
19 views

ESP8266 AutoConnect ACSelect selection index

I'm trying to retrieve the current selected/saved index of my AutoConnectSelect Right now i'm creating a type that reads the saved json: AutoConnectSelect& bright = settingsAux["...
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Same structure taking different memory space on Uno and NodeMCU ESP8266, leading to data corruption when transferring via nRF24L01+

I'm trying to transfer data between a Arduino Uno board to a NodeMCU ESP8266 board, using nRF24L01+ transceivers module and RF24 library on both side. The data I'm transferring are stored in a struct ...
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184 views

Why am I getting Invalid head of packet (0xF0) error when trying to upload code to esp8266?

Solved : In Mac I went back to Tools --> Boards Manager, then removed 3.0 and downgraded to 2.5 and it started working. I found the solution in this thread. The current connection between uno R3 ...
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esp8266 does not connect to blynk server [duplicate]

I've uploaded the code below to my esp8266, but it does not work and it shows random values on the serial monitor. I need help to resolve this problem. Regards. My code is used for dimmer project: #...
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Deepsleep ESP8266 Thing

I have been trying to get my ESP8266 Thing to go to sleep. Power LED has been disconnected. Problem is that the current consumption is initially (briefly) ~78 uA, but nearly always jumps up to ~540 uA ...
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37 views

ESP8266-01 module "AT" command testing not responding

Firstly I have connected the Arduino UNo to Esp8266-01 Module and uploaded the Simple Blink Sketch using Arduino Uno and It responded correctly as in the Blue Led Light on Esp8266-01 was blinking ...
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29 views

Can't transfer information from esp8266 to arduino

I have esp8266. Which I am trying to set up to be a self-contained access point and server (tcp). ESP8266 is connected to ports 2,3 of Arduino Uno. On Arduino, I want to process all information coming ...
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1answer
59 views

ESP-01 OTA Error uploading

Im trying to do OTA upload from Arduino IDE. Uploaded BasicOTA to ESP-01 with flash size set to (FS:2mb, OTA 1019kb). ESP-01 connects and shows up in Port selection, but when trying to upload I get ...
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65 views

how to communicate between Arduino Uno and ESP8266 via TX/RX Serial ports?

I am working on a project contains : ESP8266 as a WebServer that has a dashboard on web browser to control 8 relays connected to arduino. arduino uno board to control relays based on commands come ...
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45 views

how do i get data from the website? using arduino uno and esp8266

i have hosted a website on the 000webhost. And i have simply written a line in paragraph tags in html file( means i have created a html file..) so i want to know to know how i get data that data in ...
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45 views

How esp8266 gets response from server..?

#include <SoftwareSerial.h> const byte rxPin = 2; const byte txPin = 3; SoftwareSerial ESP8266 (rxPin, txPin); void setup() { Serial.begin(115200); ESP8266.begin(115200); delay(2000);...

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