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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27 views

Can I disable read access to an SD card by removing the read wire? [closed]

I want an internet connected host, such as a Raspberry Pi, to be able to write uploaded files to a directly-connected SD card, but I don't want it to be able to read the card. This is for protection ...
3
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0answers
30 views

Particle.io argon delay time as var

I have everything working wonderfully but I want to accomplish one more thing and I'm not sure how to go about it. Part one to this question: Under command=="loops" I have a delay() function....
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0answers
21 views

How to setup SIM800L source code if the wiring to RX and TX arduino?

I have seen many tutorials about sim800l module to arduino setup. But their wiring always connect RX and TX pin of module to data pin arduino instead of TX and RX pin of arduino. Any there setup for ...
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1answer
29 views

Arduino MKR GSM/NB + CAN + SD Card

I have some questions about a new Arduino project I'm starting: Since Vodafone (Italy in my case) is shutting down 3G in 2021 (keeping 2G/4G up apprently), is ARDUINO MKR GSM 1400 still valid in next ...
4
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1answer
62 views

How to get stepper motor to rotate smoothly and continuously?

I'm trying to build my own motorised roller blinds based off this project. It uses the Stepper_28BYJ_48 library. The problem I'm having is that the motor is either very slow and jittery, going forward ...
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0answers
66 views

Send data from GSM module to cloud server like Firebase

I am trying to search for anything to send my sensor data from Arduino + GSM SIM900A to a cloud server, preferably Firebase. Does anyone know how can I achieve this operation to Firebase or any other ...
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1answer
62 views

MQTT device shows as offline in Home Assistant when connection is established

I'm trying to create a Garage door sensor / motor controller and connect it to my instance of Home Assistant. My broker is the local mosquito on the Raspberry pi. The device is a Wemos D1 mini with a ...
2
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1answer
30 views

Best way to store the data received from aws iot core

What I am trying to achieve is that I have an Arduino base which periodically uploads data to AWS IoT-Core. But I am looking for a way to store that data and make it accessible to my web application ...
4
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1answer
44 views

Arduino LMIC: GPS Logger - old coordinates stuck in queue

I'm building a LoRaWAN GPS Logger using the Arduino LMIC Library. I've got a running solution which reads GPS coordinates and transmits them via LoRaWAN to TTN. For activation, I'm using OTAA. On TTN, ...
3
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1answer
45 views

IoT Dashboard for customers (data comes from Arduino)

I push my sensor readings from product A, B, C, D to an online cloud provider. Then my customer (call him E) needs to access all these sensor readings and make a dashboard for his customer X, Y Z. ...
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1answer
24 views

Identify the ancient IOT hardware model and find out its driver

Found from the bottom of my gadget box, I am trying to use this board for my hobby project, but I cannot even remember what model it is. Could anyone help please to identify the model of this board? ...
7
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1answer
50 views

Cannnot send from arduino to raspberry pi via LoRa

I am trying to send messages from my arduino to my raspberry pi. But I don't understand why the pi isn't receiving the messages. On the arduino side Im using an arduino UNO with a Dragino Lora/GPS ...
2
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1answer
51 views

How can I increase the size of the receiving sms Buffer in GSM

Recently I am working on programming IoT Project, to receive messages from the phone. That part worked, but the problem that I am currently facing is that the message does not arrive fully because of ...
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0answers
11 views

I'm getting an error while uploading my code to esp8266 via an arduino (FatalError('Failed to connect to %s: %s' % (self.CHIP_NAME, last_error)))

Arduino: 1.8.13 (Windows 10), Board: "Generic ESP8266 Module, 80 MHz, Flash, Legacy (new can return nullptr), All SSL ciphers (most compatible), dtr (aka nodemcu), 26 MHz, 40MHz, DOUT (compatible)...
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2answers
73 views

wireless moisture data transmission

I am mainly from software background with very very basic level of electronics/microcontroller knowledge. I recently did a small IoT project for moisture/temp detection following this tutorial At a ...
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0answers
44 views

Mini weather station project not working

I have been trying to do this project for 2 weeks. The project is about mini weather station. It uses esp8266, DHT11 sensor,BMP180 sensor and FC 37 rain sensor. I have taken reference from the ...
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0answers
14 views

Connecting STM32 device to smart lock [duplicate]

I am using a Particle Boron to connect to a smart lock but I am not being able to do it. I'm using Particle's BLE interface to connect to bluetooth and start sending messages to the lock, and a ...
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0answers
54 views

Integrating STM32 device with smart lock via BLE

I am using a Particle Boron to integrate with a Smart lock but I am not being able to do it. I'm using Particle's BLE interface to connect to bluetooth and start sending messages to the lock, and a ...
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0answers
14 views

Acquisition of data from scale (OHAUS Aviator) to MCU

I have an Ohaus Aviator 7000 scale, and I need store the weights of various items digitally. Although the scale is supposedly capable of exporting measurements directly to a computer, I have not been ...
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1answer
120 views

switching setDebugOutput off on esp8266

This thing is driving me nuts. I tried to debug my MQTT secure connection on nodecmu. Following some post from year 2015 I was switched on debugging output with Serial.setDebugOutput(true). Now I ...
3
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0answers
87 views

ESP IDF Data backup to NVS when power goes off

I am using esp-IDF library and esp32 for smart lighting. I want to maintain the state of the lights when power goes off as it can be written somewhere in NVS. Such implementation is available for ...
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0answers
61 views

convert string type value to integer type getting wrong result [closed]

I'm working on a project where I use MIT app inventor's spinner to select some one of the numeric value like 250 ,1000. I'm sending this value to firebase database and from that receiving it in ...
3
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1answer
142 views

Fs1000a generic cheap RF transmitter compatibility with Hc12 receiver?

I have build a door sensor where arduino uno reads reed switch and transmits RF 433MHz signal to other Arduino uno connected RF receiver. I am using rcswitch library and cheap ask/ook transmitter/ ...
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0answers
15 views

Not getting data from nodemcu to the firebase

I've done almost everything to get the data from nodemcu but nothing happened. I tried by changing the fingerprint. I have also used project secret and copy it in FIREBASE_AUTH part. I also ...
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1answer
68 views

How fast can I send data to firebase from nodemcu 1.0?

I was sending some variable value to the firebase database I have created: how fast can I send it? What would be minimum time interval between two values nodemcu can send and fire base can receive? I ...
5
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1answer
630 views

ESP32-CAM Camera init failure, SCCB write failure

I can successfully flash my ESP32-CAM to do the blink demo but when I try to run the code below I get the following error (b/t the asterisks/bar.) It seems the "Serial Camera Control Bus" (SCCB) is ...
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1answer
37 views

Cayenne IOT widgets greyed out using ESP8266 NodeMCU-12e

I'm using an ESP8266 NodeMCU-12e, connecting to Cayenne IOT platform. Most things work fine (I can update most widgets using virtual channels), but some widgets are unavailable (greyed-out), or simply ...
2
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0answers
28 views

Custom flashed Sonoff basic doesn't work when connected to main power

I flashed a sketch to a Sonoff basic switch R2 through Arduino IDE (with FTDI). Flash is completed and Sonoff runs the sketch successfully. The code is just a typical setup for making esp8266 a soft ...
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2answers
335 views

How many local IoT, MQTT devices on a single WiFi router?

I am working on a dedicated WiFi network of real-time, IoT devices communicating with MQTT. Messages are very short, approximately 100 bytes. There will be at least 85 devices on the network. IoT ...
2
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1answer
59 views

Building bidirectional people counting sensor

I am trying to build a people tracking sensor for counting the traffic of a specific area (building or shopping street). I need to detect people coming in or out of a room, also if two people are ...
1
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1answer
923 views

What is the difference between Particle Photon, Argon, Xenon, Boron, etc?

For one project I have used the Particle Photon, an IoT device similar to Arduino, and am considering changing to a different device for another project (a motion detector that has its own question). ...
2
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1answer
35 views

Motion detector system that can be flashed remotely

I want to build a motion detector that performs a similar service to security services, which notify me upon intrusion and provide video feed. The other main requirement is that I can update the ...
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0answers
43 views

Plotting data from arduino via server [closed]

I'm sorry if I'm not posting this question on the wrong part of stackexchange, but I have no idea where to go with my needs. I have an arduino sensor that meaasures a quantity every day. The goal is ...
3
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2answers
840 views

MQTT - keepAlive using Arduino

I'm using MQTT broker for my IOT devicess, mostly ESP8266 ( some are NodeMCU, some Wemos mini, and some are Sonoff) , running an Arduino code, some time ( about a year ). MQTT broker is running on a ...
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0answers
217 views

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

I'm experimenting with the 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
156 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
50 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 ...
0
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1answer
40 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?
1
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1answer
159 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 ...
2
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2answers
60 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 ...
16
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2answers
534 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 ...
2
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1answer
191 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
54 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, ...
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2answers
963 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
47 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
50 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
10 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
88 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
107 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 ...
2
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0answers
466 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 ...