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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Is there any easy way to change Arduino Wifi shield to ESP8266?

As the title says, is there any easy way to replace WiFi shield with ESP8266, with as little as possible modification to code? Here is my ESP:
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12answers
142k views

How can I connect to an Arduino using WiFi?

I'm working on building a solar powered, Arduino based weather station. The weather station consists of a temperature sensor and a photoresistor, and I plan to add an anemometer in the future. I would ...
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1answer
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Does the ESP8266 somehow remember wifi access data?

Today I did some tinkering with an ESP8266, trying out OTA and writing a webserver. To find an error, I reduced the sketch to just the following lines: #include <ESP8266WebServer.h> ...
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2answers
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Using ESP8266-01 with Arduino uno R3

I am trying to learn how to use ESP-01(AI-Cloud, Black Version) with arduino Initially, I created an adapter for it that has 4 inputs: RX, TX, Vcc(3.3v), GND I checked it and the wiring seems fine ...
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4answers
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ESP8266 + Arduino Uno: Can't send AT Commands

I'm trying to get the ESP8266 up and running without a FTDI chip, just my Arduino Uno. But it seems really difficult. What I did: attach the ESPs VCC directly to Arduino Uno 3.3V; RX->TX; TX->RX ...
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3answers
8k views

ESP8266 Analog read interferes with wifi?

Short version: I have a program that connects my ESP8266 to WIFI so I can control a relay connected to it over the internet or a button. I also have a sensor for my door. This software works ...
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1answer
2k views

Client or WiFiClient wrapper for adafruit CC3000 wifi

I have a CC3000 wifi module from adafruit that is working OK. Now, I am trying to use it together with an external service, which code requires me to pass a Client (from Arduino SDK) reference, but ...
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1answer
3k views

ESP32 AP max connections: 4 or 10?

I am using the SoftAP feature of the ESP to create a central node, and connecting five or six clients in the final application. However, I don't know if i can connect that many clients. One of the ...
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1answer
121 views

How to publish on Pubnub with node mcu?

I have node mcu and i am trying to use the example code on github and pubnub blog to send a msg as an experiment but can't figure how to do it. I used 2 example as the reference - https://github.com/...
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2answers
3k views

Programatic FOTA (Firmware-Over-The-Air) upgrades with Uno R3

I have been searching for a way to upgrade the sketch on my Arduino Uno wirelessly (preferable WiFi, but not a must). Does the Uno support such function? If not - are there any other boards that might ...
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1answer
130 views

NodeMCU not responding AT after blink app

I've just bought NodeMCU LoLin ESP8266, I tried to send AT commands (after spending days on ESP8266-01) and everything was okay. Than I've uploaded the Blink example to the board, after that moment it'...
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1answer
68 views

Random numbers recived by wifi shield

So I am sending a web request to a server, but for some reason the result is the number: ...
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6answers
26k views

How to connect Wi-Fi shield ESP-12E-ESP8266-UART-WIFI-Wireless-Shield with Arduino

I have bought this shield from ebay and now I don't know how to use it, ESP 12E ESP8266 UART WIFI Wireless Shield for Arduino UNO R3 Bouclier Sans filfr: There are no instructions in the box or ...
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6answers
13k views

Detect and stream if a chair is occupied

I am planning to build a device able to detect and tell a server via Wi-Fi if a chair is occupied. How would you do it? And how cheap do you think the device could be?
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3answers
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WiFi module ESP8266 + Arduino Uno

I'm trying to connect a WiFi module, ESP8266-01 to an Arduino Uno. But, as I've understood, this module will only work with 3.3 V. Since all of the data pins use 5 V, one of the solutions is to use a ...
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4answers
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What is the cheapest way to add wifi to Arduino?

I am trying to find some sort of wifi adapter for Arduino, it needs to be as small as possible (not a shield) and as cheap as possible. So far I can only seem to find shields that cost about £10+ ...
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3answers
20k views

How to send an email with Arduino and a WiFi shield?

I want to make my Arduino connect via WiFi and then send an email. The idea is very simple, but the problem is that I've never worked with those protocols and other things before. I just wanted ...
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1answer
259 views

Arduino Uno with ESP8266-01 with AT [closed]

Here is the schematic I followed: Here also the link: https://www.circuito.io/app?components=10167,11021,12083,13678,13959 #include "DHT.h" #include "NewPing.h" #include <SoftwareSerial.h> #...
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3answers
5k views

Can I use arduino's 3.3 V output directly to esp8266?

I just bought esp8266 and ftdi usb driver, I want to power the esp8266 with Arduino's 3.3 V output, is that possible? I saw some tutorial on youtube in that they are suggesting us to use 3.3v ...
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3answers
4k views

esp8266 garbage out only when using SoftwareSerial

I'm trying to operate the esp8266. When I connect RX+TX pins to pins 1+2 on the Arduino, everything works fine. but when I'm trying to use software serial all hell breaks loose and the recieved data ...
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1answer
99 views

Mega <> esp8266 comms sending baffling data

I have Wemos Mega-ESP8266 board. I have uploaded a simple WebSocket server on the ESP... #include <ESP8266WiFi.h> #include <WebSocketsServer.h> const char* ssid = "SKYNET"; const ...
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2answers
6k views

Setup arduino uno with ESP8266 ESP-1

Iam trying to set up the arduino uno with the wifi module ESP8266. I use this schematic setup: I have followed this tutorial: Tutorial ESP8266 Thereby I removed the Mega328P Chip like it says above, ...
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1answer
1k views

Arduino Motor Shield and Adafruit CC3000 WiFi Shield Compatibility

My question is similar to this one: Motor shield and wireless transceiver compete for same pins But not exactly the same! I would like to know if the solution is as practical, though. I have an ...
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2answers
441 views

Software serial conflict with WiFi on ESP8266

I'm trying to use an ESP8266 (Wemos D1 mini) to read from a 19.2K serial port and report the results over WiFi. Programming is via Arduino IDE. The code to read the port works just fine if WiFi is not ...
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1answer
82 views

WiFi connection times out if credentials retrieved via serial terminal

I've implemented a small WiFi connection procedure into my ESP32 project. The available networks get printed with index, then I'm entering the index and retrieve the network name from it. The password ...
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6answers
9k views

NodeMCU powered with battery and use WiFi

I'm running a project with a nodeMCU DevKit and my project runs smooth if I run it connected through the usb wire to the computer. I need to run my project using battery and I tried with a ICR14500 ...
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1answer
333 views

NodeMCU keeps disconnecting

I have made a home automation system consisting of a NodeMCU, 4 channel relay board running on Blynk and IFTTT. At the moment I'm only controlling a string of fairy lights and two LED strips from it, ...
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1answer
4k views

Why using a ESP01 adapter?

I bought an ESP-01 adapter (initially I thought this was the WIFI module): ESP-01 adapter Than I bought the 'real' ESP-01 (which is not arrived yet): ESP-01 However, according to this link: ...