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.

493 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
0
votes
1answer
163 views

Nodemcu stops sending the messages to the API

Here is my code which sends some data to the firebase cloud functions. The code works well and the nodemcu sends the data to the cloud for about half an hour and then stops sending the messages. #...
-1
votes
0answers
24 views

Nodemcu Deep Sleep can´t reach low compsumation (not less than 9 mA)

I'm trying to achieve the 20uA compsumation using deep sleep in "Amica" Nodemcu, but when I measure with the Multimeter I get 9 mA. What can be the issue? Diagram: power suply with 3,7 LiPo Baterry ...
-1
votes
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 ...
-1
votes
2answers
53 views

No contact between DS18B20 and WeMos D1 Mini

I have a waterproof DS18B20 sensor that I have connected to a WeMos D1 Mini microcontroller. This controller connects to Wifi and an MQTT broker, sending the temperature from the sensor and goes to ...
-1
votes
1answer
68 views

Arduino recorder with SD card module

Can any one suggest me best device in cheap rates to record audio in to SD-card and vice versa from the speaker......i want to record audio into the sd card like as feedback from customer
-1
votes
1answer
42 views

Using Library LoRa.h with Wemos D1 R2 for Lora Shield

I have been using Lora Shield for communication between server and multiple sensor with arduino . But recently i must save data received to Cloud . So i choose Wemos D1 R2 that have similar board with ...
-1
votes
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 ...
-1
votes
1answer
73 views

MQTT with OLED realy :- display not coming properly

I am very new to Arduino/ESP and I am writing a code to activate 2 relays using MQTT. Also like to display status on OLED here is my code #include <ESP8266WiFi.h> #include <ESP8266WebServer....
-1
votes
1answer
103 views

NodeMCU MQTT getting topic but not calling IF loop

I am very new to Arduino/ESP and I am writing a code to activate 2 relays using MQTT. My connection is successful and I am able to receive message/topic printed out on serial console. Here is my code: ...
-1
votes
1answer
390 views

i2c Connection for MCP4725(Dac) with Esp8266 wemos d1 mini

------------ This question has been edited ------------ note: Dac and Adc is12bits my problem : I use two ESP. Using esp1, I read the Adc amount of the alternating signal (ECG) and send it to esp2 ...
-1
votes
1answer
165 views

Multiple dht11 on an wemos d1 r1

I am trying to connect three separate DHT11 to my Wemos d1 r1. I have each sensor hooked to a power pin which turns on and off, the sensor pin and a common ground. Here is my code: #include <...
-1
votes
1answer
379 views

Sending a string from Arduino to ESP8266 works on UNO but not on Pro Mini

I have a project where I am getting sensor data and sending it over to an ESP8266-01 to send to ThingSpeak. After some work I got it to work. So like a real smart person I decided to replace the ...
-1
votes
1answer
55 views

Serial monitor shows repeated CIPSEND and CIPCLOSE

I'm trying to build a heart rate monitor using ESP-01. The code compiles and uploads well but once uploaded, in the serial monitor it shows the following. It keeps repeat CIPSEND and CIPCLOSE over and ...
-1
votes
1answer
110 views

i am getting an error while working with esp8266

i got an error avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x00 avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0x00 avrdude: stk500_getsync() attempt 3 of 10: not in ...
-1
votes
1answer
360 views

Arduino IDE / Specified folder/zip file does not contain a valid library

I trying to add library here but it doesn't seem to work https://github.com/esp8266/Arduino This happens "Specified folder/zip file does not contain a valid library" This problem make me no longer ...
-1
votes
1answer
767 views

DIP switches on RobotDyn Uno+WiFi

There are theses 8 small pins on the Uno+WiFi board. Can someone please give me a detailed table or something on the settings of these 8 DIP switches? I'm sorry if this question has already been ...
-1
votes
1answer
1k views

Arduino sketch for NodeMCU v1.0 (ESP8266-12E) has no error of compiling but does not run on NodeMCU v1.0 (ESP8266-12E) Board

i compiled a Arduino Sketch for NodeMCU v1.0 (ESP8266-12E) which have no error while i test with verifiy button in Arduino IDE 1.8.6 but i don't know what is the problem when i upload and test it . it ...
-1
votes
2answers
2k views

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 ...
-1
votes
1answer
5k views

Connecting multiple clients to a server in Wifi

What is the best method or retrieving information such as temperature from multiple wifi clients with a ESP8266-01 ? I have one server and five client running with ESP8266. I have seen post ang Get ...
-1
votes
2answers
4k views

Serial Monitor not properly interpreting data from my NodeMCU V3

I've just received several LoLin NodeMCUs from a 'cheap Chinese ebay vendor'. They're working well except for the fact that I'm getting garbage in the Arduino IDE Serial monitor. I am able to: Load ...
-1
votes
1answer
1k views

WS2811 LEDs have the wrong color unless I touch the data wire

This is an electrical/hardware issue, but for background, here's my setup: I'm using a Wemos D1 mini in conjunction with Home Assistant running on a RPi3. The MQTT setup works fine and the commands ...
-1
votes
1answer
2k views

Download and print data from Thingspeak

I opted to try doing this with Thingspeak Library instead, which @gre_gor suggested early on. Worked much easier! Here's working code for anyone else trying to do this. I used the MKR1000. #...
-1
votes
1answer
1k views

How to read data from client ESP8266-01?

I need help: my Arduino is not receiving or reading from an ESP8266-01 as a client. Actually, the ESP01-server and ESP01-client are successfully talking each other but if I attach the Arduino Uno to ...
-1
votes
1answer
1k views

How To Communicate Three NodeMcu In Access Point Mode

I'm working on project which for example 3 nodemcu connected with eachother in a line(1 connected to 2 and 2 connected to 3) and they are all in access-point mode (they are all server) and now my ...
-1
votes
1answer
4k views

error: espcomm_upload_mem failed ESP8266

So, I downloaded tools for my ESP8266 using this link: http://arduino.esp8266.com/stable/package_esp8266com_index.json I installed the last version in my motherboard manager (2.3.0) and tried to ...
-1
votes
1answer
1k views

Wiring ESP-05 to Uno

I'm a beginner with Arduino, so I'm asking how to connect ESP-05 module to Arduino Uno, before I buy it. Thank you.
-1
votes
1answer
64 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 ...
-1
votes
1answer
229 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() { ...
-1
votes
1answer
1k views

Battery Solution for ESP8266 and HC-SR04

I'm working on a project that includes an ESP8266 (requires 3.3v input (250 mA peak)) and a HC-SR04 (requires 5v 20 mA peak). I'm making it battery/solar powered. I'm trying to keep costs down as ...
-1
votes
2answers
1k views

Error in sending AT commands in esp8266 connecting to arduino IDE

I am working on esp8266 with Arduino. I have connected pins like arduino-esp 3.3-vcc gnd-gnd 3.3-CH_PD RX-TX TX-RX and reset to gnd using 3k resistor. I couldn't send AT commands in serial ...
-1
votes
1answer
1k views

Choosing Right Power Supply for Arduino - ESP8266 - HC-SR04

If I make connections like you see in picture below, will it work? Will I damage ESP or HC-SR04? As I know; HC-SR04 (VCC) -> 5V ESP8266 (VCC) -> 3.6V ESP8266 (RX/TX) -> has 5V tolerance ? I ...
-1
votes
2answers
2k views

Arduino + ESP8266 - poll file from a server?

I really need all the help I can get... It's been a week now and I'm still not able to solve the problem. I have text file on a server. The whole address is www.example.com/test.txt I want to read ...
-1
votes
1answer
116 views

esp8266 ip address issues

I have android studio app and arduino codes they are connected to each other using esp8266 but it works only on one network when I use another network it doesn't recognise it's ip address instead it ...
-1
votes
1answer
121 views

OLED shield for wemos d1 mini pro not staying on

I recently bought a wemos d1 mini pro to toy with wifi and bought a oled shield with it. I've been looking on youtube and github for software and I finally found the software and got it to load onto ...
-1
votes
2answers
154 views

ESP8266 not accessing PHP file

I'm trying to control NodeMCU via Android application and I can control NodeMCU easily but when I added the URL to hit the PHP code to enter data in MYSQL, neither NodeMCU is controllable nor NodeMCU ...
-1
votes
1answer
51 views

ESP8266 -01 doesn't reply with anything

The problem started when I tried to upload the Blink program to the module, it uploaded with no issues through Arduino but after that the blue LED didn't blink. I searched a lot for it and found that ...
-1
votes
1answer
418 views

Using Thinger.io Wifi together with HX711 library soft resets ESP8266 (NodeMCU)

I'm trying to get my NodeMCU v1.0 board to read from a load cell connected to a HX711 amplifier and send the data through Wifi to Thinger.io. I managed to make the readings from HX711, works perfectly....
-1
votes
1answer
1k views

Serial read in ESP8266-01 not working

I am new to programming. kindly bear with me. I am trying to use ESP8266-01 device for serial read and write application. Before writing the full program for my application, i wanted to test how it ...
-1
votes
1answer
4k views

Connect ESP8266 to Thingspeak

I have an Arduino UNO and an ESP8266 module. I would like to connect my ESP to my wifi network and upload data to Thingspeak. How can I do it? What I find on the web is a bit misleading and non-...
-2
votes
0answers
29 views

How to read data from ThingSpeak for esp8266

I am trying to read data from thingspeak for esp8266 but I couldn't do that. There is a link: GET https://api.thingspeak.com/channels/123456/fields/1.json?api_key=***********&results=2 But how can ...
-2
votes
1answer
426 views

Ultrasonic sensor not getting reading while connecting to ESP8266

it's been week that i am having issue,that i can’t get ultrasonic readings when i connect with my esp8266 wifi module ,everytime it gives 0 cm reading.My both hardwares work perfectly if i connect ...
-2
votes
1answer
287 views

Change Token authentication method to MQTT authentication method(username, password, client_id, ssid, passwd)

I have a mq135 sensor abd nodemcu ESP-12E module to calculate air quality and monitor it via Cayenne platform. How can I edit this below code to add and connect my Nodemcu ESP-12E module to cayenne ...
-2
votes
2answers
2k views

ESP01 PROBLEM: ip not showing up

Here is my progress on the ESP-01 ESP8266 module. I can't seem to go further, because the system doesn't have an IP and I tried all methods but still failed. ððAT OK AT+CWMODE=1 OK AT+CWMODE? +...

1
6 7 8 9
10