Questions tagged [arduino]

For questions related to the IoT applications that use Arduino. If question is about software or hardware issue with Arduino, consider whether asking it at Arduino Stack Exchange would be more appropriate.

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39 views

What are lower latency alternatives to using MQTT brokers with the ESP8266

I'm experimenting withThe nodeMCU board Attempting to proto type out an IOT project. My first iteration involved Using an MQTT broker to send messages between my computer and the board. Due to the ...
3
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1answer
55 views

How do IOT platforms like Blynk, ThingSpeak etc. communicate with hardware (e.g. ESP8266) without port forwarding?

I use port forwarding if I want to access my local server NodeMCU from internet. However if I use IOT platforms like Blynk, ThingSpeak... then I dont need to care about port forwarding. We can access ...
2
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1answer
45 views

RFID Specifications and Project Recommendations [closed]

I'm very new (one day) to the IoT world. I've got a specific project I want to tackle, as a intro to IoT, but I'm also open to general advice on getting started. In summary, I want to know if my ...
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1answer
27 views

ultrasonic sensor reflecting waves in water or not [closed]

When an object is kept opposite to an ultrasonic sensor, it reflects the waves. In case the object is water, does it reflect or not? How does one know?
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1answer
68 views

Water meter reading using LORA

We need to get reading of meter using LORA. Previously, we have used NodeMCU with Wifi module but it contains short range. We need long range which will be around 10 km to 20 km, So we must need to ...
1
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1answer
25 views

Where to find descriptions of the example ESP32 sketches in the Arduino IDE?

I chose this one at random https://github.com/esp8266/Arduino/blob/master/libraries/ESP8266WebServer/examples/HelloServer/HelloServer.ino but looked at the code of others & hope that there is ...
8
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1answer
133 views

What is a good way for an IoT device to receive its network settings?

I'm in the process of building an IoT device using ESP8266. The device will eventually contain a couple of motors, and I would like to control these motors using MQTT. I would like to make the device ...
1
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1answer
45 views

ESP32: Timestamp cannot be sent by MQTT

for one week I am searching for a solution at my ESP32 project (development over Arduino IDE): In my project I execute the following step: Read Temperature via BME280 Ask time at NTP server (via time....
1
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1answer
41 views

Remote sensor cloud connection

i'm just starting out in Arduino, IoT etc; I was given the Elgoo Uno R3 Arduino starter kit at the weekend and i've been trying to soak it up. I would like to make a number of sensors for my van, ...
1
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1answer
95 views

How to test internet connectivity of network to which esp32 is connected?

I want to know if the network to which esp connected has internet connectivity or not. How can I send a ping request using esp32?
2
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1answer
40 views

How to store non-volatile data (an ID) inside a passive physical object?

I'm starting a project that evolve some kind of multiple small physical IoT objects that can be plugged dynamically to a wood board and trigger some leds. My question is so simple that I'm afraid of ...
4
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1answer
40 views

For my “switch on light with clap project ” will sound sensors detect other sounds other than a clap and switch on the light?

I am just a high school student who is trying to self-learn for my IoT home automation projects.Please excuse me if this question sound silly to you.This time I am working on this "clap to switch on ...
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0answers
9 views

Can there be a correlation between Emonlib current increase and RTC unsync on MKR 1300?

I'm having this weird issue where my data Send interval gets screwed up when the monitored current goes above 27A. Basically, it keeps adding several seconds to my interval, here's an example: ...
4
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2answers
73 views

Building a special effects rig

I'm not sure if this is the best place to ask but I will give it a try. I build mechanisms that are used in commercials, tv shows, window displays, multimedia art etc. They generally involve ...
3
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1answer
78 views

Smart gate - where to start?

I have this idea of writing an app/something to make the gate, that we have in front of our house, smart. But I just don't know where to start. I assume that the gate uses IR because we have remotes ...
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0answers
68 views

Xamarin.Forms to ESP8266 Wifi moduleConnection [closed]

Am build new application for ESP8266. Then how can i connect my xamarin.forms application to esp8266 any reference and documentation for this. Already referred WIFIManager library in android many of ...
1
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1answer
36 views

Alternative way of developing own Hardware [closed]

Developing your own hardware is expensive. Our company has few requirements for our hardware. Cellular communication, GPS transmission and capturing acceleration. Since we need only max to 1,000-5,...
3
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0answers
52 views

run arduino code without a usb cable connected to a computer [closed]

I am using sim7000E with arduino uno and i want to be able to run it without a computer. I tried to connect it only with the power supply with the correct power and again it doesn't run my code. Does ...
3
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0answers
99 views

Arduino MKR 1300 LoRa library and RTC problem

I have a really weird problem with the Arduino MKR 1300 and the use of the RTCzero library. Simply put when I use both of them the data does not get sent and I have no idea why. The alarms when not ...
5
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7answers
303 views

How to detect desk occupancy in office

I'm working on a POC to try and find desk occupancy in an office. The aim is to identify which desk is occupied and how many are free and where are the free ones. Also I would like to identify who is ...
4
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2answers
121 views

IoT app and software [closed]

I'm new to IoT and this is my first project, I didn't find the answer to my question anywhere. Is there an app for Android and Windows software that can control an Arduino device from different ...
3
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0answers
92 views

SCT-013-000 with Arduino MKR 1300

Has anyone tried to use this particular sensor (SCT-013-000) with that particular Arduino (MKR 1300)? Cause I keep getting different results when connecting Arduino UNO and then trying the MKR, both ...
2
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0answers
70 views

Does MQTT inresponse can cause a reset due to network activity?

Setup description: I have 8 ESP8266s running an Arduino code to control windows shades up and down using relays, local switches and MQTT for remote operation, which work OK for the past few weeks. ...
7
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2answers
73 views

Make Embedded Board NTP Server for Arduino boards in the subnet

I have an Embedded Board where the distribution on it is a custom Linux Distribution based on Yocto. I have added ntp and via ntpd I will sync time with the common ntp pools either via UMTS 3G dongle ...
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2answers
170 views

Scalable Arduino ESP32 IoT project ( with lots of users )

I'm planning to create a Arduino device that measures distance, and sends the data to AWS IOT via WIFI . After that i want to see the measurements on an Android or iphone App. How can i make my idea ...
2
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1answer
559 views

Can I use MatLab code in esp32?

We've some method to run the MatLab code in esp8266 microcontroller. We can manipulate Arduino pins using Simulink in MatLab. Can we do the same with an esp32 microcontroller as their code can be ...
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0answers
56 views

IoT hub on private network [closed]

I want to make a hub for file sharing in my private network like DC++. Is there any library which I can use or do I have to develop it from start. This can be developed for Arduino or Raspberry PI.
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0answers
87 views

Control GPIO of ESP32 using Bluetooth [closed]

I’m using ESP32 to control relays using MQTT ( both over Arduino and MicroPython ). For special cases, and not for everyday operation, I wish to control a specific GPIO over Bluetooth ( a reset irq)....
1
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0answers
262 views

ESP32: no signal output on I2C bus [closed]

I have an ESP-WROOM-32 (I2C master) and an ATmega328p (I2C slave, address 0x03) assembled on a prototype pcb using external 6k8 pullups. I'm using the ESP's default I2C pins 21 (SDA) and 22 (SCL) as I ...
3
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1answer
346 views

Distance calculation based on RSSI value

I want to calculate the RSSI value of a Bluetooth module (HC05) and from the derived RSSI value I want to calculate the distance of the surrounding devices. I'm using an Arduino Uno r3 as a controller ...
2
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2answers
159 views

IoT and middleware

We are building a solution as described below: Arduino-based sensors read data and send it to Raspberry every second. Raspberry Pi processes these data and then communicates with a backend system ...
3
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1answer
381 views

MQTT Library for Arduino using GSM

I am developing a vehicle tracking device.I want to send data to server through MQTT from my sim808 GSM module.But I couldn't find any good library of MQTT for Arduino. There are so much resources for ...
4
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1answer
111 views

Efficient Server- and Protocol structure for raspberry, smartphone and 3rd-party-device network

I am new to this forum and this field. I am looking forward to good criticism and tutorials/links/instructing suggestions to build a nice system with as less effort as possible while achieving all ...
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0answers
36 views

In atmega128 bootloader.hex file missing [closed]

I want to use atmega128. I have added atmega128 with the help of Megacore . But bootloader.hex file is not generating when I compile the file. Now, what can I do to solve the problem.
1
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1answer
106 views

Connect sx1272 module to a Dragino Gateway

I am new to Lora technology. I am using a sx1272 Lora Module and I am trying to send and receive data to a Dragino Gateway. The problem is the sx1272 and Dragino use two different libraries and hence ...
0
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1answer
54 views

First steps to learn IoT with watering plants project [closed]

I am an experienced developper, and I want to learn IoT beginning with a small project. Automatic Watering the plants of my house. Here are the requirements: The project is for learning purpose It ...
6
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1answer
446 views

Commercial Arduino Reprogrammable Smart Plug

Has anyone reprogrammed a commercially available smart plug, such as the Etekcity Voltson? Are there plugs available with open source Wi-Fi chips in them that perform better than an ESP8266? I’m ...
5
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2answers
360 views

What is the library to be used to implement CoAP in ESP8266?

I am using Arduino IDE to program my ESP8266. I would like to send data from one ESP8266 module to other. So I would like to use CoAP for this communication. Is there any standard or good library to ...
0
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1answer
41 views

Arduino Serial Error [closed]

I am using Arduino ATmega2560. I have defined Serial as CONSOLE. When I am using CONSOLE it shows me error. #include "Arduino.h" #define CONSOLE Serial; void setup() { CONSOLE.begin(...
6
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1answer
97 views

Could not ping ESP8266 Wifi module connected to an Arduino

I have been working with a water flow counter which sends data over wifi. I'm using an ESP8266 wifi module. Everything is correctly connected and I've gotten to the point where it's correctly ...
1
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0answers
348 views

How to send data to broker from arduino, sim808 using mqtt protocol

I want to send data from my arduino ATmega2560,sim808 using mqtt protocol. By executing my code, successfully connected to broker but couldn't publish message. #include "Arduino.h" int led = 13; ...
7
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0answers
116 views

Connecting air conditioner to Apple's HomeKit

I'm planning to connect my air conditioner to Apple's HomeKit app. At first I searched for ways to do it, but I couldn't find a solution that would work for that project. As I've found, Apple ...
2
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1answer
131 views

Industrial Controller Vs Prototype Controller(Study level Controller)

What is the difference between industrial Controller and prototype(Study)level controllers or Raspberry pi/Arduino Vs. Industrial Controllers(PLC, NON PLC) controllers
8
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1answer
243 views

Control arduino via MQTT

I working with several arduino board and now I need to control them via a web interface. Via web interface I want to activate GPIO. I have two ideas: Each arduino acts as web server and I can ...
4
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0answers
215 views

Sending temperature sensor's data to Kaa-IoT platform via 6LoWPAN

I want to set up some sensors in different places, which are wire connected to my development board, Raspberry PI or Arduino. I'm going to send the data wirelessly but without using WiFi protocol, ...
6
votes
1answer
69 views

How can I write bytes to BH1750 via line buffer IC (ESP32)?

I want to switch data reading from multiple sensors by line buffer IC (74F244). My problem is I can't read anything from sensor when I connect via IC but can when connect sensor to ESP32 directly. I ...
6
votes
1answer
96 views

Error: 'NN_DIGIT' does not name a type, while using google-cloud-iot-arduino

I recently started learning IoT with ESP8266MOD (Arduino IDE). I want to start working with Google Cloud IoT, but confused about how to use google-cloud-iot-arduino. I tried its Esp8266-http example, ...
1
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0answers
292 views

Wireshark capture Arduino FTDI USB traffic in order to debug applications that talk to the arduino [closed]

I use arduino UNO with ATMEGA16U2 running as FTDI chip. Furthermore According to wireshark's instructions I enabled the USB monitoring for wireshark as well. Also over my GNU/Linux Machine the lsusb ...
3
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0answers
58 views

Is it possible to use both Lua and the Arduino IDE on the node-mcu?

I've been playing around with two node-mcu boards uploading Lua scripts via ESPlorer on one and uploading code built from C++ via the Arduino IDE. I've come to a point where I have preference for Lua ...
6
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1answer
1k views

Using Arduino LoRa with RFM9X chipset: How to connect the RMF9x NSS pin?

As I am searching on libraries that can be used with Lora and arduino I came across on this one: https://github.com/sandeepmistry/arduino-LoRa Also the RFM9x has the following pinout: The data ...