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Questions tagged [iot]

The tag has no usage guidance.

0
votes
1answer
22 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:-...
0
votes
0answers
34 views

How to achieve active 4G LTE communication?

I'm not sure if this is correct place to post this, if not PLEASE redirect me to the proper page, as this matter is quite pressing to me. My entire day was spent researching different methods of ...
-1
votes
1answer
19 views

How to upload sensor data on pubnub IOT with JSON Format?

I am trying to send MPU9250 sensor data to Pubnub IOT platform using node mcu, but not able to do it since the sensor data is not in JSON format. I know about publishing string but don't know about ...
0
votes
1answer
53 views

How to interface MPU9250 and NodeMcu?

I am trying to send MPU sensor data to Pubnub IOT platform but not able to do it since there is some unknown problem. There is no error in code but following issue pops up in com port:- It looks like ...
0
votes
0answers
26 views

Arduino communication to Particle (Photon)

I initially wanted to connect a K30 CO2 sensor to Particle Photon and send the data to cloud. Simple. However, it turns out that there are no libraries that support the use of K30 CO2 sensor to ...
0
votes
2answers
25 views

Is it possible to connect miband2 and arduino nano (?)

I want to make an IOT project using an Arduino nano and I need heart rate sensors. I I have a miband2. So, is it possible to connect them ?
0
votes
0answers
70 views

[SOLVED]Arduino SIM5320e HTTP GET request to 000webhost.com

Im having trouble getting a successful HTTP GET request to a domain under 000webhost.com I am trying to do a GET request which sends data to a php file on my domain and save it to MySQL database. I ...
0
votes
0answers
15 views

Can't connect to the server

I am working on a specific project that requires a database. I have done the 'connection' and the "write" of data using a PHP file. I have even reconfigured everything so it would be possible to ...
0
votes
0answers
49 views

How to use ESP8266 with Google API for GPS as well as controlling Arduino pins

I am working on IoT based project and I want to control the device using mobile App. Everything works fine, I can switch the load and get the status back on mobile app, but I want to use my ESP8266 as ...
0
votes
1answer
52 views

Can't extract basic data using ThingspeakHTTP

I don't know anything about HTML, but I want to extract the % probability of the Northern lights being visible from this webpage http://aurorawatch.ca/. I entered this into the URL field, and selected ...
0
votes
1answer
45 views

WSO2 IoTS : No Data shown on Server by Arduino connected via Ethernet

Description: While enrolling Arduino device on WSO2 IoT server, I made necessary(WiFi to Ethernet connection) changes in the sketch that I downloaded from the server and uploaded it. The following ...
0
votes
1answer
81 views

Websockets with the ESP8266 using arduino uno board

I'm trying to make an iot device that connects to my wifi, establishes a socket connection with my golang backend and then starts to send sensor data from the ardunio. I've got an ardunio uno board ...
-1
votes
1answer
441 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 ...
0
votes
1answer
70 views

The right way to find and understand the libraries

I am working on a project to send sensor values from esp8266's Wemos D1 mini to MySQL. I tried using the library MySQLconnection.h but I couldn't make it to connect to wifi. So I uploaded a simple ...
0
votes
2answers
1k views

Ethernet nodemcu

I have a question that might be a #noob question but I am wondering if there is a board similar to the nodemcu in size that runs arduino code but instead can use ethernet to connect to the network ...
-1
votes
1answer
168 views

Arduino DDS IOT ESP8266 controlling AD9834

first post, having probs with uploading sketches on win10, blink sketch loads but when I try either of 2 sketches which have been specifically coded for this duino I get the following error: ...
0
votes
2answers
49 views

How can an Arduino determine the status of a washer or dryer using only vibration data? [closed]

I'm trying to make an IoT washer/dryer device that will text me whenever my load is done. I was initially thinking to make assumptions about what data it should be receiving when the washer/dryer is ...
0
votes
0answers
31 views

Machine to Machine communication not working properly(2 ESP-01's)

I am trying to have a client ESP-01 communicate with a server ESP-01 by reading data off of a pressure sensor and then based off that either send an alarm state or a disarm state, if it is in alarm ...
0
votes
1answer
49 views

servers , free domains with ESP [closed]

Lets Say That I Have a routine like: I have written PHP codes for the free domain that will: Wait for request like url/control?ToDo="someMethod",parm=Something (posting some password for ...
0
votes
0answers
139 views

What causes the ESP8266 wifi module to hang after multiple post or get requests?

I have a source code for sending GET request via ESP8266 that was working just fine a couple of weeks ago, but now it just hangs after sending a GET request until it times out and I just don't know ...
0
votes
1answer
455 views

Arduino Uno with ESP8266 Wifi transceiver or ESP8266 NodeMCU board?

I already have an Arduino Uno, and I want to learn Internet-of-Things. I'm planning to use an ESP8266 since it's cheap. Should I purchase an ESP8266 Wifi transceiver module to use with my Arduino Uno ...
0
votes
1answer
128 views

ESP8266 sends data to the website but doesn't return status

I have problem with my esp8266 it connects to my site and sends 89 bytes of data but does return a confirmation status all i get is SEND OK but i don't get any confirmation from my server This is my ...
2
votes
0answers
1k views

How to listen to multiple server ports with ESP8266?

I'm using WeMos D1 R2. I'm trying to listen to both ports 1992 and 1993. This is my current code: #include <ESP8266WiFi.h> WiFiServer server_1992(1992); WiFiServer server_1993(1993); void ...
1
vote
0answers
66 views

Ultrasonic Sensor Distance problem [closed]

I Am facing a problem measuring distance with an ultrasonic sensor. I am doing an IOT garbage system and dust levelling is measuring by the ultrasonic sensor. But ultrasonic sensors not giving the ...
0
votes
1answer
134 views

NodeMCU successfully uploaded sketch but it does not work from Arduino IDE

NodeMCU successfully compiled and uploaded a simple blink sketch on board, no errors at all, but the LED stays on constantly and does not blink. Also I have checked the power is enough. I have checked ...
0
votes
0answers
237 views

ESP8266 doesn't connect to WiFi

I'm using an ESP8266 with the following pin configuration and it doesn't connect to my WiFi. The blue light on the ESP module is on and my LED is on. That's it. VCC - 3.3v GND - GND CH_PD - 3.3v GPIO ...
0
votes
2answers
8k views

How to post HTTP POST requests on my website?

I am working on a NodeMCU board to post sensor data on my website service. Basically my project is about POST and GET requests both in single code. I am succeeding in sending GET requests from my ...
-1
votes
1answer
1k views

how to remove this error “invalid conversion from 'const char*' to 'uint8_t ” [closed]

C:\Users\lenovo\Downloads\Adafruit_MQTT_Library-master1\examples\mqtt_esp8266\mqtt_esp8266.ino: In function 'void setup()': mqtt_esp8266:63: error: invalid conversion from 'const char*' to 'uint8_t {...
0
votes
1answer
72 views

Changing outputs infinitely for no reason

Im a student and working on a arduino project for IoT competition and me and my team have built a house and I made this code below. For some reason when I upload it to my Arduino MKR1000 it constantly ...
3
votes
3answers
1k views

ESP8266 disconnects after few hours

My system looks like this: ESP8266 is connected to Arduino Uno (2, 3 pins) and a relay's data input to Arduino's pin 12 and power for relay is provided from another source. Arduino gets data from ...
0
votes
2answers
48 views

Is there any way for one Arduino board to communicate with multiple sensors? [closed]

Say a home IoT application to monitor water levels in basement at 4 or 5 different places and transmit that data back to a single Arduino board to be then interfaced with a GUI to do home monitoring?
0
votes
2answers
393 views

SSID was not declared in this scope

so I am new to arduino and coding in general, I am trying to use the arduino to remotely survey plants, I am using this guide: https://create.arduino.cc/projecthub/arduino/plant-communicator-7ea06f. ...
-2
votes
1answer
132 views

esp8266 not defined in scope while using in class

Below code was working fine without using classes, after using class an error pops up: esp8266 is not defined in this scope #include<SoftwareSerial.h> #include<ArduinoJson.h> #include<...
3
votes
2answers
9k views

Simple GET request with ESP8266HTTPClient

I am trying to do a simple GET request. But I always get status code -1. Here is my complete code. #include <Arduino.h> #include <ESP8266WiFi.h> #include <ESP8266HTTPClient.h> ...