Questions tagged [wifi]

Wi-Fi is a trademark of the Wi-Fi Alliance. A Wi-Fi enabled device such as a personal computer, video game console, smartphone, or digital audio player can connect to the Internet when within range of a wireless network connected to the Internet.

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Esp 12e delay while connected to phone [closed]

I am making an esp12e plane as seen on instructables. The problem is that when i successfully connected my phone, The esp is responsing after 5-10 seconds of phone command given. Please help me asp. :)...
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ESP32 - `Brownout detector was triggered ` upon Wifi begin

I'm Using an ESP32 - NodeMCU. One of the MCU's is acting weird upon boot, while at start I thought it was something to do with its sleep cycle. But, it seems that even on a minimal code as shown below,...
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31 views

Cannot send any UDP packets from ESP8266 Wemos D1

I am attempting to send sensor data from a battery-powered device using UDP. The goal is to send a datagram immediately after the wifi station awakes from sleep then immediately go back to sleep after ...
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Sending arduino sensor data via WiFi to a MySQL server

I'm aware this question has probably been asked many times but I'm pulling my hair out. I'm trying to get sensor data from an arduino to a MySQL server. I've checked the apache access log and the ...
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possible to preform VIO from two cameras/imu's on a dual-core esp32?

Like the title says, I want to take in the synchronised data from two NXP breakout boards and two Ueye 1220LE Cameras, and use VIO to fuse their data and get positions for both setups. Alot of people ...
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22 views

WIFI Bee ESP8266, MySQL and PHP

I am trying to update a db table using a WIFI Bee. For the life of me, I can't figure out how to connect to and program the WiFi Bee ESP card. I've looked on DFRobot's website and other websites to ...
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18 views

CIPSEND Shows 404 error using aeduino + esp8266+01

I am trying to save data in the data base with the get method. my url works fine when used with browser but when tried with esp shows page not found expection. Arduino Code SoftwareSerial ESP8266(...
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102 views

Can I get around extremely long time to setup WIFI connection WPA2 Personal?

I'm using the Arduino Wifi Nina Library to connect an Arduino Uno Wifi Rev2 to wifi and then using the Arduino HTTP Client library to make HTTP post calls to the internet. To connect the Arduino to ...
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33 views

what is causing my esp8266 setup function to reinitialise?

Here is code I have written: #include <stdio.h> #include <ESP8266WebServer.h> #define MAX_WIFI_INIT_RETRY 50 #define WIFI_RETRY_DELAY 500 const char* wifi_ssid = "ssid"; const char* ...
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ESP8266-01 & Arduino Uno Problem

I am having a problem when I want to run code like this on a Arduino Uno with esp8266-01. It's not working. In serial monitor nothing about esp. #include <SoftwareSerial.h> SoftwareSerial ...
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Print connection password typed by user on NodeMCU Lua ESP8266 ESP-12E

I want to make a WiFi Access point created with the ESP8266. Let's say that the SSID is 'net_work' and the password is '12345678'. When a client tries to connect with a wrong password, I want to ...
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How to connect multiple NodeMCUs and 1 PC over wifi and have PC control NodeMCUs? [duplicate]

I am trying to design a laser tag system using multiple NodeMCUs in the guns. I am trying to figure out how to connect and control them over WiFi. I also need a computer connected that will control ...
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Getting external data to the Arduino

I have a new Uno R3, it's pretty cool and I've enjoyed playing with it. Now I want to build a couple of things: 1) a market price LCD tracker. 2) a servo motor type thing to open my electric gate. ...
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Arduino Nano IoT 33 Char Array size constraints

I would like to save data that I am receiving from API calls in a char array. The problem is the data is around 80KB however my Arduino IoT 33 has 32KB of memory. It will save data in a char array ...
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247 views

Why doesn't OTA work with the Ai-Thinker ESP32-CAM board?

I have working code on an Ai-Thinker ESP32-CAM board, programming over serial. I would like to reprogram using OTA, but adding in the functionality from the BasicOTA sketch (which I have done on ...
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29 views

ESP8266 to ESP8266 via home rooter

I would like to ask how to build a star topology network with several ESP8266s, pc and a home wifi router? I would like to connect my computer (as a client) and ESP8266s (as clients) together via a ...
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Several ESP8266 in wifi network should share information

I am currently working on a project for my home where several ESP8266 (each with a relay) control lights. I have developed an android for this where I find the ESP8266s via mdns but the problem is ...
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75 views

Problem sending strings to another ESP

I am having some problems with retrieving data from another esp. I have two esp8266, one is the access point which has a nextion lcd hooked up to it. The access point reads button presses from the lcd ...
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61 views

Serial read SSID and PASSWORD WiFI connection failed in ESP32

Trying to get Wifi SSID and password dynamically from serial monitor and connecting to WiFi, tried the below program, but wifi is always in Connecting state only, it is not getting connected after ...
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1answer
58 views

NodeMCU Server side cannot send things to client side - multiple clients attached

I technically need your help, when I am working on my project, I found out that my server-side cannot send data to the client-side, my server-side is made with WiFiServer(80) so it is when my client-...
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69 views

ESP8266, I am trying to establish a SoftAP and I cant seem to get the WiFilocalIP function to give me my IP

I am just trying to establish a server and it seems that I can't get the serial monitor to read the local IP of my device and my Client can't establish a connection to update the sensor value. when I ...
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29 views

Arduino HTTP Command - ESPEasy

I am new to Arduino and although I am starting with and creating some basic projects my end goal right now is to be able to turn my Sonoff on and off via a momentary switch attached to my Wifi enabled ...
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1answer
50 views

NodeMCU unable to connect to mobile hotspot when I include codes for reading the temperature sensor

Good day. The NodeMCu successfully connected to mobile hotspot when i didn't put any others codes except the Wifibegin etc. Howveer when I include some codes for temparature sensor, it keeps on ...
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44 views

How to change wifi credentials of multiple ESP8266 together

I need to change WiFi credentials of multiple ESP8266 in one go, without needing to change passwords for each of them individually. I know there is a WiFiManager library, which makes your ESP8266 ...
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34 views

Creating a router with ESP32 and SIM800c

I am trying to create a device which is a combination of ESP32 and Sim800c. This device (Master) will start AP mode on ESP32, so that other devices (Nodes) will connect to this AP. The Sim800c will ...
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45 views

How to set up “ESP8266 Wifi Bee” on “Gravity: IO Sensor Shield For Arduino Mega Due”

I'm new to sensors and Arduino, trying to send the live data from my hydroponic garden to Thingspeak. I obviously found tons of info and tutorials on how to connect to Thingspeak - that I can handle. ...
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65 views

How to get Transmission package Timestamp from ESP8266

I am trying to make an Indoor positioning system using ESP8266 as a beacon, how do I get the transmission package timestamp from router to ESP8266 and vice-versa? Thank you in advance for any advice
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64 views

How to display CAN BUS information on EPS32 web server?

I try to display the transmitted information from CAN bus on ESP32 web server. I saved the CAN.read() in a buffer receivedChars[i] and try to display the data by client.println(receivedChars[i]);}. ...
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40 views

Which board to use for wireless communication of small packages? [closed]

I was hoping to get your advice on what Arduino boards to look at for a project I'm working on. The project involves two separate boxes in different rooms of my apartment (~ 5-10 feet away from each ...
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159 views

esp8266 WiFiClient Troubleshooting

I have a pair of ESP8266 modules: 1 Server running in (STA+AP mode or AP mode) and 1 client. The client cannot seem to make a TCP connection to the server. Only changing the wifi-networt, HOST, and ...
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104 views

Esp32(Arduino Core) + Blynk Wifi Connection Problems

So I am making a football playing robot which consists of 3 servo motors. Currently,i am only checking only a single servo(myservoKicker)which is operated via button in the blynk app and trying to ...
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191 views

ESP8266 and WPA2 PSK network

I'm having some issues with esp8266 connecting to a wifi network. I'm testing with a hotspot from a mobile phone. If I set the network to open (no security) my code below works without any issue. If ...
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99 views

ESP8266 as ISP for Arduino Mega2560

I'm trying to use an ESP8266 Node MCU 1.0 (ESP-12E Module) as an ISP to program an Arduino Mega2560 over Wifi with no USB cable. (USB connected to ESP8266 module just for power). I used the sketch '...
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1answer
84 views

Send Arduino data to Database using ESP8266

My project is to receive data from Bluetooth (HC-05) sensor and storing it in the database. I have successfully received data from Bluetooth sensor and stored it in a String variable. Now i have to ...
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34 views

Desmos D1 + Numpad + relay can't put D15 pin on HIGH

So I basically have the following setup: This schema is not %100 accurate, since the tool I used to generate this did not allowed me to express exactly what I wanted, so some clarifications: The CPU ...
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46 views

ESP32 WIFI and BLE power status

Regarding the esp32, I am wanting to understand a couple of things related to both wifi and ble power control. 1.) How can I do a status check on whether both the ble and wifi radios are powered/...
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35 views

ESP8266 and Public WiFi

Can I use C++ and an ESP8266 to connect to a public wifi network that requires user acknowledgement of terms and conditions? Acknowledgement is typically a checkbox or submit-type button. Any ...
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284 views

Is there an Arduino library that uses ARP to get list of connected devices on network?

I have been looking for a library that can execute an ARP (Address Resolution Protocol) command to return a list of connected devices on the network. The idea is that it would send the request to the ...
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55 views

Long range wireless RC airplane control

I pretty new to Arduino and I need help to clarify some things. First, I want to make an Arduino controlled RC airplane but I don't know what communication module to use. I did some research and ...
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44 views

Unable to get input from Wemos D1 PIR sensor

I am using the script below to create a motion sensor using a Wemos D1 and a PIR sensor. I'm using the ESP8266 Community board manager (V2.6.3). THE PROBLEM When I use the Wemos D1 R1 board no ...
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604 views

esp32 arduino wifi disconnect

I have this code running on ESP32 connected to SVM30-J #include <WiFi.h> #include <PubSubClient.h> #include <Arduino_JSON.h> #include <svm30.h> // Replace the next variables ...
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Not able to run mysql query but able to connect using mysql library from wemos d1 mini

I have a very simple code trying to insert data to mysql server from wemos D1 R1, I am able to connect to mysql server, but not able to insert data or even select anything. #include <ESP8266WiFi....
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77 views

ESP8266 keeps restarting after a few hours of use and dead after 1 month of use

I have tried to make a water heater relay controlled by an ESP8266 (NodeMCU v1.0). The ESP8266 is connected to a central WiFi in my house, the ESP8266 also has its own WiFi so I use STA and AP mode ...
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Uno Wifi rev2 - SSL socket connection

On Arduino Uno Wifi rev2 I want to create an SSL socket to my own SSL socket server implementation. The board can download a webpage with encryption (after I've installed the certificate into it of ...
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114 views

I need to Get my changed SSID and Password in my Serial monitor

I have this(Wifi Manager - Autoconnect IP) program run in my arduino IDE. And I get the output in serial monitor as this Can Anyone help me in displaying my SSID and PASS in this serial monitor ...
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220 views

ESP8266 Connection with WPA2-PEAP Enterprise Network

I am trying to connect my nodemcu 12E module to WPA2-entrprise network but not able to connect. I had gone through the Espressif Forum and GitHub but still not able to resolve my problem. here is ...
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134 views

ESEP8266 using WiFi Manager doesn't connect when re-entering WiFi range

I'm able to connect to WiFi through WiFi manager, but when it leaves the WiFi range it enters AP mode. If I bring it back into the WiFi range a couple hours later, it is staying in AP mode and not ...
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1answer
195 views

Make OTA work with Arduino Uno Wifi

I just bought a Arduino Uni Wifi Rev. 2, with the itention of doing over the air uploads to the devices. By reading the official Gettings started with the Arduino Uno Wifi guide, I thought the ...
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68 views

Constantly getting RC=-2 error with Arduino Mega and ESP8266 as the wifi module for MQTT

I am trying to use the ESP8266 as the wifi module. My connections are as follows: ESP8266 <-----------------> Arduino Mega VCC ------------------> 3.3V (converted 5V from Mega to 3.3V ...
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87 views

What kind of antenna should i use for my esp8266 module?

I have an esp8266 module and i want to increase its range by adding an antenna to it. What kind of antena should i use. Can i use an antenna from a RC car remote?

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