Questions tagged [esp8266]

An IC that offers Wi-Fi networking compatible with b/g/n standards. It also has integrated TCP/IP protocol stack. Extremely popular along IoT community as a low cost and powerful board.

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63 views

ESP8266 does not response

My wire schema ; http://bloglug.com/wp-content/uploads/2015/08/Arduino-esp8266-baglantilari.png And i'm using arduino, it has blank loop. I'm trying AT command by using Serial Monitor and I have no ...
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2answers
7k views

Do I need 3 voltage dividers to control ESP8266

I am buying an ESP8266 and the plan is to control it serially from an Arduino. I am going to use a voltage divider(Using a voltage divider is temporary and I know the cons of using voltage dividers). ...
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0answers
753 views

Error loading Blink sketch in esp01 (esp8266)

I have the esp01 connected the serial port using a usb to ttl serial cable and also using the Arduino UNO as suggested in some tutorials. I can execute AT commands. But loading a sketch from Arduino ...
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2answers
3k views

What is the best way to get more RAM for a sound buffer?

The problem: How to extend the memory for a sound buffer (intensively used) if: SD card library supports only one file open at a time (and I have one open already) EEPROM chips are able to stand ...
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1answer
3k views

ESP8266 Arduino 2.2inch ILI9341 TFT library

I recently got one TFT LCD from aliexpress which supports SPI and uses ILI9341. This is the one.TFT LCD I have the ESP8266 EspressoLite 1 board, and I am using ESP8266 Arduino. (https://github.com/...
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2answers
333 views

ESP8266 as WiFi for Arduino

I have a pretty simple project, where some data has to be read from a mySQL server. My idea is to do this with an ESP8266, and then provide that data to the Arduino Mega. Is this possible or am I ...
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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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1answer
308 views

Can Arduino be used as an FDTI Programmer?

I would like to program my ESP 8266 WiFi module. But I don't have an FDTI right now is there any way to use Arduino Uno as FDTI Programmer then use ESP without it.
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4k views

How to Capture Data from a Webpage in Arduino and Display it over Serial Monitor of ESP8266?

My Code is as follows-> #include <SoftwareSerial.h> SoftwareSerial ESP8266(8,9); String inData; void setup() { ESP8266.println("AT"); delay(1000); ESP8266.println("AT+RST"); } void loop() {...
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1answer
2k views

Esp 8266 doesn't reply to AT commands

I am working on esp8266 module with arduino uno board. This is my program. #include <SoftwareSerial.h> #define DEBUG true SoftwareSerial esp8266(2,3); // make RX Arduino line is pin 2, make ...
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4answers
3k views

Will I be able to control stuff from anywhere in the world if I use a wifi shield like ESP8266?

Currently, I am using a Bluetooth shield, HC-05, which is working perfectly but there are two problems: Only one person can connect to Bluetooth at a time. I have to be in a specific place to be ...
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2answers
2k views

mqtt library which support softwareSerial on arduino uno with ESP8266

I am using ESP8266 and Arduino with SoftwareSerial. My requirement is to use MQTT protocol with it. So I am using an MQTT library named pubSubClient but the problem is it doesn't support ...
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4answers
4k views

ESP8266 sends webpage to client, but html codes appears in browser instead of webpage?

I am using ESP8266 with Arduino MEGA. ESP8266 is powered 3.3v via voltage divider, which is taking 5v from arduino and converting it down to 3.3v with the help of 5K and 10K resistors. AT commands ...
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1answer
1k views

ESP8266 blink not building to esp-01

I am trying the esp8266 esp-01, and did all it asked on the arduino IDE side, but i am having problems compiling and building the blink example into the board Using: FT232RL usb-ttl in the 3.3v ...
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3answers
6k views

ESP8266: Is it safe to use pin 0?

This (maybe stupid) question is bothering me for a long time... If the pin 0 has to be connected to the ground for uploading a sketch into ESP8266, and after the uploading the chip automatically ...
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1answer
123 views

Find number in a reply returned via serial

I am communicating with my GoPro via ESP8266 and GET requests. One of the replies returns a set of predefined number and what I would like to do is extract the number on position "38". This is what ...
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1answer
3k views

Arduino/ESP8266 no SPI data coming from MCP3008

I'm using an ESP8266 (NodeMCU Dev Kit v1) to read analog data via an MCP3008 ADC chip. However I'm receiving only zeros when I know non-zero data should be present. I'm using the following code, ...
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2answers
889 views

When should you worry about interference affecting the analog input?

I made something that uploads the measured current to Thingspeak. Everything works, but i did not place the DC to DC converter on the board because i was worried that it would interfere with the ...
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1answer
222 views

Connecting to WIFI using esp8266

This is my code. I am tring to make a connection to my wifi through esp8266. #define DST_IP "192.168.1.5" // my IP #include <SoftwareSerial.h> SoftwareSerial mySerial(0, 1); void setup() { ...
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0answers
842 views

ESP8266 pin multiplexing possible?

I am trying to use Adafruit's ESP8266 implementation for a project of mine, which makes use of a bunch of sensors. The problem I have is the limited amount of pins available from ESP8266: 2 pins are ...
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3answers
847 views

No Response from ESP8266 WIFI

I am getting no response back from an ESP8266 WIFI with Arduino Mega using library ITEADLIB_Arduino_WeeESP8266. //serial monitor response setup begin FW Version: to station + softap ok Join AP ...
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1answer
10k views

Retrieve value from ThingSpeak using ESP8266 with Arduino setup

I just started learning ESP8266 and in my first project I am successfully able to send data to ThingSpeak.com using ESP8266 with following code: uploadData() { String apiKey = "ESDS8678890SDDS"; ...
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1answer
1k views

ESP8266 sending GET Request and getting 408 Timeout error

I am using esp8266 to send a GET Request but I am getting 408 Timeout error. Here is a screenshot of my output.
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4answers
624 views

Using ESP8266 core for Arduino

I am working on a wireless sensor network project, in which data is collected at a central node using nRF24 modules and the RFNetwork.h library. I want to post that to the internet using the famous ...
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1answer
791 views

How to use voltage divider between ESP8266 (3.3v) and IR proximity sensor (5V)?

I am a software developer and I don't know much about circuits so I need help. I have an ESP8266 (esp-12) 3.3V and I'm planning to use it with an IR proximity sensor (runs between 4.5-5V). I have 2 ...
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1answer
433 views

ESP8266 module cutting connection with PC via USB

My Arduino UNO is connected directly to the ESP8266 (01) WiFi module. The Red and Blue LED flashes and it seems to work properly. But when I connect the UNO to my computer, the module refreshes at ...
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3answers
5k views

Critical sections in Arduino, interrupt consuming data

We all know the interrupts, but how do they really work? The problem: In my sketch an interrupt method (invoked when pin goes high) is consuming data from a buffer and the main loop() is filling the ...
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1answer
13k views

Streaming audio from PC to Arduino over WiFi

Say I wanted to, purely hypothetically, set up a pirate radio station by connecting an Arduino to a WiFi network away from home, streaming music to the Arduino, decoding it, and broadcasting it with ...
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1answer
10k views

Trying to send data to the server and AT+CIPSEND not working correctly

Sending data to the server(thingspeak.com/184.106.153.14) with AT commands on serial monitor works fine but whenever i upload the sketch ,the following always return false if(Serial.find( ">" ) ). ...
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1answer
361 views

Why does getting list of files from SD card FAIL if not printing to Serial? (ESP8266) [closed]

I've got this piece of code for reading a list of files from root directory on SD card, which I run on ESP8266 chip (maybe it makes a difference): File dir = SD.open("/", O_RDONLY); int n = 0; ...
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2answers
755 views

Shield:FAIL problem in ESP8266-01 with Arduino UNO

I have been working on a Security System project wherein I should get an email if the PIR sensor detects any human presence. I have used an Arduino UNO, ESP8266-01 WiFi module and a PIR sensor. Power ...
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0answers
2k views

Sending data from Arduino UNO as a SOAP request

I have a servo motor on one end which can be turned ON and OFF with web service sending SOAP request. In the other end I have my Arduino UNO with ESP8266. Currently, I am able to send HIGH or LOW ...
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1answer
400 views

Can I apply a Kalman filter to DHT11 data?

I want to apply a Kalman Filter to the humidity data which I retrieve of the DHT11. How can I do that?
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0answers
1k views

Non-blocking MQTT library

Are there any MQTT libraries that do not block while connecting? I'm currently using PubSubClient, and the connection part contains this code: https://github.com/knolleary/pubsubclient/blob/master/...
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1answer
624 views

Arduino UNO stuck in Setup function when interfacing UNO with ESP8266 module

Following is my code that i am trying to use it with Arduino Uno with ESP8266 module but my code stucked in setup function why is that. #include "ESP8266.h" #include <SoftwareSerial.h> ...
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1answer
1k views

How to use potentiometer on one Arduino to control servo on another Arduino via WiFi?

I want to connect a potentiometer on one Arduino (master side) and send the readings to another Arduino (client side) to run a servo motor. The communication between the two Arduinos should be via Wi-...
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1answer
39 views

Arduino sensors with various periods

Right now I have DHT11, PIR sensor, relay, and a photocell on the same board. I am planning to upload the data to a web server. But I want both DHT11 and photocell to be uploaded hourly; PIR and relay ...
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1answer
4k views

Arduino Nano ESP8266 software serial problems

I have a problem with my Arduino Nano ATmega328 and my ESP8266 01 module. I have connected the ESP8266 on my Arduino board without FTDI. I have made the following connection: I an using a 5V ...
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2answers
2k views

How can there be not enough current?

I am new to the Arduino world. I have a question regarding current that the Arduino outputs over its 5V port. Why is the current in the Arduino too weak for current hungry circuit when the only thing ...
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1answer
977 views

ESP8266 blue led stays stays on [duplicate]

I have found a similar qustion to mine but there was no good response. I've connected my ESP8266 to Arduino UNO. Then I got some trouble with software serial communication with Arduino and decided ...
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0answers
357 views

Multi-file arduino esp8266 sketch sharing a reference to server

Transferred from stackoverflow on the advice of @Gee_Bee: I can get Writing a Library for Arduino to work as well as Breaking a sketch into multiple files and Classes within Classes - ...
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1answer
3k views

Can't compile my library because “String does not name a type”

I am writing a small library to move some code out of the arduino sketch and make it reusable. Problem is that it does not compile since "String does not name a type". This is my code (reduced): ...
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3answers
638 views

Why does my PIR sensor stay high with ESP8266 breakout board?

I have a PIR sensor attached to a Amica nodeMCU board routing 5v from VIN and attached via USB port for testing. When motion is deteted it connects to the internet and sends data to IFTTT which i ...
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0answers
2k views

ESP8266 GET OR POST Request Timeout Error

i am using ESP8266 module serially with PC and i also tried it using uno I am stuck at the following point I am able to made connection to server but when i will send the following command POST /...
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1answer
288 views

Low-Pulse Occupancy and Voltage Divider

I have a PPD42NS dust sensor I'd like to hook up to an ESP8266-01 microcontroller. The ESP8266 uses 3.3v logic, but the PPD42NS uses 5v. The PPD42NS uses low pulse occupancy as output. I'd like to ...
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1answer
410 views

Not seeing frames returned from client when using ESP8266 Wifi Shield

I'm trying to make a web server using an Arduino R3 and Sparkfun ESP8266 Wifi Shield. I've built a webpage that has a form I would like to control the Arduino with. Currently my sketch can ...
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5answers
6k views

ESP8266 shows garbage in serial monitor

I have my ESP8266 connected via serial to USB like the image shows: It worked just fine, however, when I tried flashing Blynk code #define BLYNK_PRINT Serial #include <ESP8266WiFi.h> #...
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1answer
10k views

HTTP POST request to IFTTT

I'm trying to send a POST request to IFTTT from a Node MCU. Instead of writing the code from the scratch, I've tweaked an already existing code (for GET request). It does not seem to work, what am I ...
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5answers
19k views

Esp8266-01 AT commands returns random chars and/or “ERROR”

I'm trying to make my esp8266 work with my arduino. But when I send AT commands I get some weird symbols and some functions return "ERROR" Here's the code I'm using. #include "SoftwareSerial.h" ...
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1answer
283 views

ESP8266 Firmware Upgrade

Can I upgrade my ESP8266 firmware by connecting the pins in Arduino Uno, or do I still need a USB UART to Serial?