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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ESP32 + ArtNet stops responding

This is less of a FastLED specific issue and more ArtNet + ESP32, but I figure that this community has done enough of these types of things to be able to help. I have a simple sketch gluing together ...
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33 views

WebSocketsServer.h: No such file or directory

I'm trying use the NodeMCU WebSocket. I downloaded the required libraries from: https://github.com/Links2004/arduinoWebSockets and pasted them in my Arduino libraries folder. I uploaded my code but ...
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36 views

Can't print out a field with ArduinoJSON

I'm trying to create a command interpreter. Allowed commands are stored in a JSON document inside SPIFFS. If I send an allowed command, it doesn't print the field associated with that value (end of ...
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Multiple WiFi client/server connections

I'm implementing a WiFi HTML web server using the WiFiNINA library, an Adafruit Airlift ESP32 coprocessor, and a Teensy 3.5. It's starting to work, but I have a couple of questions. This simplified ...
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ESP8266 WiFi.begin() isn't working

I did a project for IoT attendance system using ESP8266 and RDM6300. However, I can connect to wifi using WiFiMulti.addAP() function for my home WiFi. I tried WiFi.begin() instead of WiFiMulti.addAP(...
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Running out of GPIO & looking for suggestions

I'm working on a project using a NodeMCU and am quickly running out of GPIO pins. I'm trying to decide which way to go to complete it. Right now, I have the MCU connected to a MAX31856 PT100 ...
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40 views

Data logging from ESP32 through UDP socket to PC

The idea is to send raw sensor data from ESP32 to PC through WIFI UDP socket and store it into CSV file using Python. As you can see from the code I am chopping 8 bytes of data into single bytes and ...
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32 views

Problem with multi-client ASCII text parser (TCP)

I have been having a heck of a time getting my Arduino Uno Rev2 application to work as intended, which is to parse commands from multiple clients sending in ASCII-based commands over WiFi in order to ...
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strcat parameters throwing pointer errors in my tcp server / parser application

I am attempting to use an Arduino Uno WiFi Rev2 board to integrate some lonely data. I will use the NINA WiFi chipset and associated libraries to start a server that will periodically request and ...
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1answer
67 views

Error Compiling sketch for Arduino Uno(ld return 1)

I have got an telnet server with esp8266 + SoftwareSerial+ UNO, and here I want to on led with command ON . will be 1 or 2. It is for recive 1 or 2 numbered pins. And I extract pin from request with ...
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Why sometimes parsed data is null in WiFiEsp?

I'm setting up web server with args. As host.com/?pin=9. I parsed the response by indexOf and substring functions. In first connection response has been successfully parsed and number has been parsed ...
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How to use ESPAsyncWebServer with SoftwareSerial communicating ESP01f

I'm creating a web server with using host.com/?ll="some". But I read that I can use for it ESPAsyncWebServer for this things. And how can I use it without flashing esp? If possible give me link to the ...
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61 views

Parsing HTML GET request with params with WiFiEsp

So I'm Setting up webserver with esp-01f+arduino uno. I'm using WiFiEsp library. I want to toggle led on. Pin will be given in GET request by url. Example: host.com/?ledpin=9 How can I parse it, ...
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21 views

Node mcu does not connect

im trying to connect to my wifi with mit Nodemcu, i recently got a new router and since then i can't connect anymore. I use simple example sketches from esp library but it will not connect. Instead i ...
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33 views

TIMEOUT error when connecting ESP8266 to Arduino Uno

I am trying to set up my Arduino Uno to receive information from the internet, but I am having a very hard time finding proper guides online. I am using an Arduino Uno and ESP8266-01. I am trying to ...
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71 views

ESP-NOW: Master and Slave at the same time

I am interested to use ESP-NOW as a means to transmit data between two ESP32's back and forth, - each ESP receives and sends data, taking turns. The example library provides an example sketch for ...
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WiFiServer Stops After Reconnection to WiFi

In the following code, the Arduino is reconnecting to the WiFi after several loops. The idea is to check and re-establish WiFi connection every 30 minutes or so. However, the WiFiServer seems to ...
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36 views

How to connect ESP8266 to my home WiFi securely

I'm working on a home automation project using NodeMCU ESP8266. Most of the example projects I see online provide their WiFi SSID and password in plain text at the beginning of the code by storing ...
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28 views

Sketchy Wemos D1 mini Pro

Recently, I bought a "ThingPulse ESP2866 Wifi Color Display Kit". I bought the kit before reading the reviews and finally read them the other day. Some of the reviews seem fake but a couple of them ...
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28 views

How does WiFiServer.status() work?

What are the possible outcomes of calling status() on a WiFiServer from ESP8266WiFi.h? The only documentation I could find only says it returns uint8_t. Here's the link.
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59 views

Create one server in AP mode and another in station mode

I'm trying to connect one ESP8266 to WiFi as a WebServer in station mode and to another ESP8266 as a server (that has no web pages) in AP mode. The problem is both servers are being created in AP ...
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70 views

SOLVED: Is it possible to use WiFi and Bluetooth / BLE in the same ESP32 project?

SOLVED @Majenko's answer works like a charm. I did have to make some changes as follows: Per Majenko, you need to change the Tools > Partition scheme. I used "No OTA (Large APP) as he suggested and ...
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32 views

Adding WiFi to my Arduino Keypad Lock

I'm a really passionate beginner with arduino and electronics and I've built a Keypad lock for my room's door (inside the house). I've used an arduino that activates a motor using a transistor to ...
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28 views

Can too much power consumption cause NodeMCU to trip?

I made a home automation setup that involves a NodeMCU and a 5v relay module. Now, this setup automatically disconnects from the WiFi randomly. It sometimes connects immediately, sometimes it takes ...
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67 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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52 views

How to acheive fast and reliable communication between NodeMCUs?

I have two NodeMCU which have to send data to a server (also a NodeMCU). I want to acheive speed of atleast 10Hz because the sensor sends it at that rate. I have tried websockets and couldn't get ...
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36 views

Which of the ESP8266 alternatives allows for full packet capture/injection in promiscuous mode?

I am part of a product group that is developing a low cost wireless intrusion detection system, for home usage. We have already produced and delivered to market ESP8266 based product however for the ...
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Mkr1010 disconnects and reconnects normally until it reaches a point where it never reconnects again

The board does reconnect from time to time, but there are times where it just disconnects and never reconnects again and I can't replicate the error because while I run it with Serial open and turn ON ...
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36 views

How can remove the WiFi/Bluetooth libraries when compiling the firmware using the Arduino IDE?

I have an ESP32-D0WDQ6, which is part of the ESPIRIT freematics development kit. The processor is a 2-core Tensilica LX6 and the module has 520 kB SRAM + 4 MB external on-module flash. It also has the ...
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60 views

Understanding WiFi.printDiag(Serial)

I am having difficulty with setting up websockets using the Arduino IDE with an ESP8266 ESP8266 Websockets problem and I have added WiFi.printDiag(Serial) to the main loop of my code. The Output I get ...
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36 views

Arduino with external Wi-Fi antenna?

I need to create a project where I need to send data via Wi-Fi using an Arduino. I need the Arduino to have a U.FL connector to place an external Wi-Fi antenna (I can't use the MKR1000 with ...
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1answer
24 views

Will Funduino Joystick Shield work on a Mega?

I am trying to get a Funduino Joystick Shield working with an Arduino Mega and I need to use the WiFi capability. The specs I have found for the Funduino (see https://protosupplies.com/product/...
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21 views

I need to connect Arduino uno with esp-01 and relay control via Android application

I have trouble connecting to esp8266-01 through arduino uno and controlling relay via Android application or a local web server. I did a lot of research. I do not want to use esp-01 independently. ...
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23 views

How to count and list number of all UDP clients to WiFi softAP or event if new available?

I have simple ESP32 app (server, soft access point): WiFiUDP Udp; .... void setup() { WiFi.softAP(ssid, password, WiFi_chennel); Udp.begin(portServer); } .... void loop() { .... for(byte i=0;i<...
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146 views

What is the use of reserved pins and SDD2, SDD3 pins of the NodeMCU?

How to use the reserved pins on the NODEMCU? What is their use? Also what is the use of SDD pins? Thanks.
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152 views

Get 5V output from NodeMCU [duplicate]

I have a sensor that requires used of 5V as input to Vcc. But I dont see any 5V output pins on the NodeMCU 1.0(12E). Is there a way I could get 5V output pins? Its not a duplicate question. I want a ...
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97 views

Person (phone) detector that trigger an event esp32 cam [closed]

So me and my dad are trying to catch would be thieves and also someone leaving behind alcohol bottles. At his storage business the cameras don't reach to these spots. Without being too invasive I ...
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Can't get fastled.h and remoteme.h to work together

I'm trying to make a Google Assistant controlled LED strip, but I'm stuck. I can control the on board LED of the nodemcu with Google Assistant, and I can control a LED strip too, but I can't combine ...
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108 views

ESP8266 Webserver not reachable after 2 minutes from reset

I have a Keyes Espressif ESP8266 NodeMCU, I have two LEDs that I want to control which are connected to the ESP. When I open the webpage http://10.0.0.5/5 after uploading the sketch it works fine. If ...
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28 views

Arduino and NodeMCU problem with wifi conecction

Hello guys I am beginner with micro controllers but I am trying to make a simple IoT with Arduino and NodeMCU as WiFi. I was using this tutorial and code https://www.electronicshub.org/wifi-controlled-...
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62 views

How to send and receive data over LAN from an esp8266 operating as a station?

I have an esp8266, I have an led connected to one of the GPIO pins, I want to be able to control the state(high or low) as well as request the current state of the led from my computer which is ...
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171 views

How to create a wired ESP8266 range extender? [closed]

Context: I have a NETGEAR router on the first story of my home, the range doesn't extend to the ground floor. I do have a cable duct from my router(on the first story) to the ground floor. Question: ...
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1answer
116 views

Connecting to WiFi on ESP32 using credentials from SD card

I'd like to use an SD card to provide the login credentials to an ESP32. I've already got the ESP32 reading the relative data from the SD card and storing it as a char array on the ESP, but when I use ...
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1answer
34 views

Nodemcu does not connect to phone wifi

All welcome. I'm trying to connect nodemcu to the phone's wifi. And nodemcu can't do it. But sometimes after several reboots she does it. Also if i use my old phone - nodemcu connects perfectly! ...
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1answer
84 views

Is it possible to do an OTA update using a GitHub link

I need to be able to download software updates through the internet without having my MKR1000 plugged in. Either that or have new code being pushed from my server (C++) to my MKR1000, and then ...
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16 views

Communication between IP camera and ESP8266

I'm working on IoT project. The part of it is about taking photos automatically basing on some sensor data. I have searched on Google but I couldn't find the information I need. Is it possible to ...
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2answers
34 views

OTA push sketch to NodeMCU

Similar questions regarding Arduinos mention the existence of tools that would enable the pushing of sketch updates to NodeMCU via WiFi / OTA (Over The Air). Does this proceed? If so, please ...
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43 views

ESP8266 does not detect WiFi networks

I have an ESP8266-12E, I used it previously and it worked fine (approx 2 years ago) I can't seem to get it to detect WiFi networks or appear as an Access Point I can upload the blink sketch and the ...
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58 views

Can´t load a program into my ESP01 using an ArduinoUno

This is my problem, I´ve been trying to load a program(any program) into mi ESP01 and because I do not have the usb adapter, I decided to use my Arduino Uno to do the work. This is my first time ...
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3answers
160 views

Wifi stopped connecting (Wemos D1 Mini)

I am stumped. I have a few Wemos D1 Mini boards that were working on the local WiFi yesterday, yet today none of them will connect. More puzzling is that I can flash Tasmota on them and they all ...