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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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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1answer
22 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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1answer
789 views

ESP8266 print DNS address (obtained via DHCP)

I've set up an ESP8266 (Wemos D1 Mini) to get IP-information via DHCP. Everything works fine and I can print the information : Serial.print(WiFi.macAddress()); Serial.print(WiFI.localIP()); Serial....
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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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1answer
822 views

Using Arduino wireless SD Shield to save data to sd card and send to PC over wireless network

I'm using an Arduino Mega to monitor the current & voltage input to four different sensors. This works fine - the sensors work as expected and I can view the results via the Serial Monitor or ...
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0answers
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add devices to WIFI network without graphic/physical interfacing to it [duplicate]

i am looking to configure a device and upload the program to it's hardware so that when it recieves power it is programmed to generate it's own wifi that can be connected to, so that i can give it ...
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3answers
2k views

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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1answer
34 views

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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1answer
28 views

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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2answers
41 views

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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1answer
783 views

Wemos D1 mini freezing after a few minutes

I´m using a Wemos D1 mini board to control a RGB LED Strip and programmed a simple code with the Arduino IDE. The Wemos conects to my Internet just fine and with the IP adress I can change the RGB ...
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2answers
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ESP8266 doesn't detect WiFi

I try to connect my NodeMCU Amica to my WiFi network, but it doesn't detect any networks around. I chose Board "NodeMCU 1.0 (ESP - 12E Module)", upload speed of 115200 and I have the correct port ...
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1answer
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ESP8266-01S Stopped responding after second launch

Here's the code: #include <SoftwareSerial.h> #define RX 6 #define TX 5 String AP = "..."; String PASS = "..."; SoftwareSerial esp8266(RX,TX); void setup() { Serial.begin(9600); Serial....
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2answers
107 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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1answer
49 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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1answer
2k views

Arduino CC3000 websocket client

I am working for arduino websocket client with CC3000 wifi board from adafruit. I have usde this websocket example as a reference and modified to work with cc3000 wifi board. I am not able to connect ...
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1answer
49 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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1answer
820 views

Making two Arduinos/MKR1000 communicate

I am trying to create a project in my free time just for a bit of fun - it consists of two MKR1000 (one acting as a web server connected to one laptop, and the other acting as a web client connected ...
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1answer
42 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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1answer
28 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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2answers
1k views

Error running FirebaseDemo on nodeMCU

So I followed the guide on GitHub to run this demo which compiles and runs. It does warn of some deprecations and such in the firebase libraries : In member function 'const String& ...
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1answer
112 views

Timeout error with Arduino Mega and ESP8266 as the wifi module

I am trying to use the ESP8266 as the wifi module based on this tutorial. My connections are as follows: ESP8266 <-----------------> Arduino Mega VCC ------------------> 3.3V (converted ...
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2answers
33 views

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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1answer
93 views

Problem stacking ADS1292r ECG shield and Wifi shield on Arduino Uno

I want to use ADS1292r ECG shield with Arduino Uno (Seeeduino V4.2) and store the data in an SD card through an Wifi shield. But the ADS1292r shield uses Digital pin 4 for "RESET" purposes, while the ...
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2answers
198 views

CC3000 gets wrong address when connecting to wireless AP

I tried using both the SparkFun and Adafruit CC3000 libraries first with what I actually wanted as a program, but when that didn't work, the examples for those libraries, and I always seem to get the ...
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1answer
25 views

command keeps echoing because web page tries refreshing

I want to execute a action only once when I press web page button but as the page tries refreshing the action gets executed in a loop. I am using the wifimanualwebserver example for esp8266. Please ...
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1answer
53 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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1answer
73 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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1answer
1k views

Reading Data from Google Sheets using Nodemcu

I want to read and writ data on Google sheets using ESP8266 WIfi Nodemcu and I'm able to do it but the time interval between two writing row is 3 seconds which is too much. I can read data but I am ...
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1answer
66 views

Esp8266 + Atmega328p as flash

Being clear I'm not talking about How to flash ESP8266 using arduino. I want to ask how can I use atmega328p as flash with esp8266 (instead of that 8 pin small chip on ESP-01) so that I can burn ...
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1answer
54 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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1answer
47 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
103 views

Not able to convert String to Integer when receiving data from pubnub?

I did managed to upload mpu9250 sensor data on PubNub and nodeMcu but not able to use the received data to control servo Look at the Port reading and see that servo angle is still showing '0' Code:-...
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1answer
26 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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2answers
131 views

ESP-01 + UNO won't detect gateway

Apparently, this combination of hardware won't accept anything other than WiFiEsp.h together with SoftwareSerial.h (if anyone knows something better/newer than these two, please let me know). Thing is:...
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3answers
624 views

Mosquitto TLS over WifiMulti on ESP8266

With these few lines I am able to attach my certificate, tell it to WifiClientSecure the certificate, start the wifi as well as the mosquito pubsubclient: WiFiClientSecure espClient; WiFi.begin(ssid, ...
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1answer
525 views

HLK-RM04 wifi shield factory reset?

I have this HLK-RM04: It came with no catalogue or manual all threads about it are in Chinese after when I found the configuration webpage and changing it to client it wont connect and it stopped ...
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4answers
572 views

I am not able to use ESP8266 12E with Arduino

I am doing my engineering degree. I want to make a project connecting multiple ESP8266 with a router and control multiple relay boards. I am unable to use ESP8266 12E with Arduino. I used this ...
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0answers
31 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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0answers
41 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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1answer
116 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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1answer
61 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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1answer
212 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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1answer
71 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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1answer
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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0answers
157 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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1answer
35 views

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
60 views

Stream video from camera to mobile and send control signal back from mobile to Arduino via WiFi

I want to make an Ardunio based project in which I want to stream live video from camera (which is connected to Arduino borad ) to my Android app via WiFi and send back actions/control signals from my ...
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1answer
64 views

WiFi or Bluetooth to communicate between several Arduinos and a Raspberry Pi

So I want to set up a network of outdoor sensors (temperature and humidity) connected to an Arduino (and at some point a second or third Arduino further away with its own sensors). Then I'd like this ...
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0answers
84 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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