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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32
votes
12answers
162k 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 ...
31
votes
1answer
52k views

Whats the difference between RF options (wifi, xbee, NRF24L01)

When doing RF, you have many options. Three of the most basic are in the title box WiFi Xbee NRF24L01 What are the practical differences in using them. What is the purpose of each other and the pros ...
19
votes
4answers
24k views

Parse JSON with arduino to turn on LED

Hi i'm trying to parse JSON resposne from webserver in my arduino in order to turn on and off a LED light. I'm using the wifi client repeating example to make a get request to my server: http://...
13
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1answer
2k views

Internet connectivity for the Arduino Due using AtmelStudio?

What hardware and software solutions work and what are the tradeoffs for connecting an Arduino Due to the internet? I gather the ethernet hardware is much cheaper than WiFi hardware (€29 versus €69). ...
12
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1answer
7k views

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> ...
11
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2answers
3k views

WiFi Password Safety

Are there any best practices regarding password safety? The following is taken from a wifi tutorial sketch. #include <SPI.h> #include <WiFi.h> char ssid[] = "yourNetwork"; // ...
11
votes
4answers
10k views

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+ ...
8
votes
6answers
3k views

Over-the-air upgrades?

I'd like to be able to upgrade software on an arduino without physically touching the device or stringing a cable. Can it be done? Will pick wireless protocol that makes that easiest.
8
votes
3answers
12k 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 ...
8
votes
3answers
6k 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 ...
8
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2answers
18k views

How to turn off or stop Access Point network in ESP8266?

I've created a code for ESP8266 12E with Arduino IDE, in which it'll operate as "Station Mode" or "Access Point Mode" on Wifi, depending on the situation. Everything works fine except when device was ...
7
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3answers
1k views

Using Arduino for Industrial process

I was wondering if the Arduino is applicable for Industrial monitoring, I want to make a real time status of the presses in our company. I haven't seen or read much about people using Arduino at an ...
7
votes
1answer
3k views

Serving binary file with ESP8266WebServer

I am currently using a Nodemcu ESP8266-12E with the Arduino IDE in order to control my boiler. Everything is working fine, however I haven't figured out yet how to serve binary files, eg. images. (I ...
6
votes
1answer
15k views

ESP8266 - does it really have terrible wifi range by default?

ESP8266 - does it really have terrible WiFi range by default?? First time to try this module out and we're disappointed with the range.. as per our testing we can only get max 5m WiFi range line of ...
6
votes
1answer
2k views

EPS8266 ESP-01: LED manipulation seems to interfere with serial communication

I'm playing around with this udp-example. Both this and the blink-example work perfectly. Now I would like to use the LED to indicate what the ESP is currently doing, as well as reading some data over ...
6
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6answers
31k 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 ...
5
votes
1answer
4k views

How can I transmit data to/from arduino from up to ~750 ft away?

I am working on a design project for school (non-capstone non-electrical engineering project) where we are building a system to remotely control a winch on a boat that will lower an independently ...
5
votes
3answers
737 views

ESP8266 WiFi Not Connecting to Internet Without Static IP

I am seeing some very strange behavior with my ESP8266. When I connect it to the WiFi for the first couple of times I am not seeing any issues and the ESP8266 connects just fine. But after an ...
5
votes
1answer
744 views

FCC Certification

I noticed that both the Uno and Wifi101 are FCC certified. Does this mean that these components can actually be used in commercial applications? This never really occured to me before I noticed the ...
5
votes
3answers
5k 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 ...
5
votes
1answer
4k views

How to disable Arduino Yun to work as Access Point and set it to work as needed?

I am using Arduino Yun and I would like to disable it to work as Access Point. That is, I don't want that it is displayed in the list of available networks. Then I would like to set and use it (...
5
votes
2answers
153 views

Is it possible to use Wi-Fi as a wireless connection to my Arduino/Windows PC LAN without using the internet

My Situation and Problem: I am wanting to put together a system to help monitor the soil moisture content in my garden and a small heated greenhouse I use in the winter. Also, In the near future I ...
4
votes
6answers
15k 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?
4
votes
5answers
21k 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 ...
4
votes
2answers
4k views

Controlling LED from web server

I have a LED attached to my Arduino wifi shield that I want to control from my PHP web server. In terms of communication, should I Make my Arduino a web server and then communicate with PHP web ...
4
votes
2answers
3k views

ESP32 open "captive portal" on connected

I am using the default example SimpleWiFiServer that comes as an example from the ESP32: #include <WiFi.h> #include <WiFiClient.h> #include <WiFiAP.h> #define LED_BUILTIN 2 // Set ...
4
votes
2answers
6k views

How to allow cross-domain requests on ESP8266WebServer

I am using a Raspberry Pi running Chrome (handling the user interface) and connecting via ajax to an Arduino D1 compatible using the IP address as follows: $.ajax({ type: "GET", ...
4
votes
2answers
5k views

Difference between WiFiClient and HttpClient

Apologies if this question appears to be too vague but I would like to know the key differences between these two clients. While WiFiClient comes pre-loaded with Arduino IDE, HttpClient doesn't. ...
4
votes
5answers
6k views

Arduino Yun external antenna

Can someone help me understand how the external antenna IPX connector actually stays connected to the Yun? Do I have to "force" it in so it snaps in? I've been somewhat gentle with it in fear I'll ...
4
votes
1answer
7k 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 ...
4
votes
1answer
5k views

Can I get the current connection speed with ESP8266?

Using an ESP8266 I can get the RSSI of the Wifi network using Wifi.getNetworkInfo() or Wifi.RSSI(). But is there a way to know the actual connection speed in Mbps, after joining successfully a WiFi ...
4
votes
1answer
14k views

Wi-Fi module 5 GHz [closed]

What is a Wi-Fi module for an Arduino that works on 5 GHz? The ESP8266 - doesn't support 5 GHz according to: Re: 802.11AC 5GHz Why can't ESP8266 operate in 5 GHz since 802.11N is supported my own ...
4
votes
2answers
1k views

How can an Arduino Mega 2560+Wifi Shield 2.0 (SeeedStudio) receive data from database in a XAMPP server on my PC?

I'm trying to connect my Arduino Mega via Wifi to my XAMPP server. My main objective is get a value from my database and store it on a variable in Arduino code. With this new variable I'll be able to ...
4
votes
0answers
2k views

Send custom 802.11 data frame with ESP8266 [closed]

I would like to send raw 802.11 data frames in order to transmit pictures with the ESP8266. I have the Espressif SDK 1.3 and so far I have tried to construct a packet and send it with ...
3
votes
4answers
34k views

ESP8266 not connecting to WiFi

I am trying to send the temperatures from an DS18B20 to ThingSpeak, using an ESP8266. You can see the code I am using for that. When I run the code I do not get any errors. In serial monitor it just ...
3
votes
2answers
7k views

Use ESP-01 with Arduino Uno/Nano, with the ESP8266WiFi library

There is this library - https://github.com/esp8266/Arduino That provides a more user-friendly API for WiFi capabilities with the ESP8266. However, all tutorials that I found so far for this library ...
3
votes
3answers
2k views

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 ...
3
votes
1answer
9k views

ESP8266 on WiFi without password, possible?

Is it possible to connect to an SSID that does not require a password? My project using ESP8266-01 modules will sometimes be used in non-password protected guest networks.
3
votes
2answers
650 views

Is it possible to use ESP8266 modules interchangeably?

I discovered that there are multiple types & versions of ESP8266 modules. I'm wondering: Build my application around one type (eg ESP-03) and in future swap the module with another (ESP-07), ...
3
votes
1answer
727 views

Arduino Library to make http post request with bearer authentication

I want to make an Http Post request with Bearer Authentication to my api using my Arduino Mkr Wifi 1010, but I couldn't find the appropriate library to do something like this (code generated with one ...
3
votes
1answer
10k views

What's the smallest Arduino board with wifi capabilities? [closed]

The Photon from Spark IO looks super small. Are there smaller wifi enabled microcontrollers available that can be programmed with the Arduino IDE?
3
votes
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 ...
3
votes
4answers
6k views

Scan IP address of ESP8266

I am working on a project in which, the mobile app/browser sends HTTP command to ESP8266 in AP mode. The default IP address of ESP is 192.168.4.1. Therefore in order to connect the ESP to WiFi, the ...
3
votes
3answers
3k views

ESP8266 not working. No response

Hello. I have begun working with an ESP8266 and an Arduino Uno. The connection I used is shown below, except I am using an Arduino Uno. The rest of the connection is the same. The code I'm using is: #...
3
votes
2answers
2k views

Wirelessly communicate between two Arduinos without router

I want to "connect" two Arduinos, without using wires. The range is ~0.2 miles (300 meters). Using Google, I saw too many options. The idea is to build something like a beacon, so the bandwidth can ...
3
votes
2answers
996 views

updating firmware on arduino wifi shield

I'm trying to upgrade firmware on my wifi shield by following the upgrade instructions for Mac. I was wondering what this means?: Connect a jumper on the J3 connector, that put the shield in the ...
3
votes
1answer
1k views

"No Socket available" for WiFiClient

I have an LDR/Photocell which sends a value 1 or 0 (depending on the value) to a text file on my web address. The code works for a few seconds then prints out No Socket available. Any help will be ...
3
votes
1answer
408 views

ESP-01 won't start correctly

I'm trying to connect my Arduino Uno to an ESP-01 module, but I can't get it to start correctly. All I can get out from the ESP-01 is an "invalid" message when it is enabled. Can anyone please help? ...
3
votes
1answer
1k views

Bluetooth Master and Slave to track device's locations

I'm trying to create an app for my science fair that uses bluetooth to track people in a determined place. I was thinking about one Arduino system to receive all the information and transmit through a ...
3
votes
1answer
3k views

Connecting an ESP8266 to WiFi without hardcoding the credentials

I've recently achieved connecting my board, an ESP8266 to my local WiFi, but I've had to hardcode the credentials to the code, just like in 99% of the tutorials online. My code looks somewhat like ...

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