3
votes
0answers
13 views

Send values from HomeAssistant to ESP8266 via MQTT

I would like to send values from the HomeAssistant to an ESP8266 via MQTT. I have already successfully done it the other way around (sending temperature values from the ESP to HomeAssistant via MQTT) ...
3
votes
1answer
23 views

What is the difference between bandwidth consumption and speed of IoT protocols?

If IoT protocol has small bandwidth consumption, does that mean its speed is slower? I heard that MQTT is perfect for when we are restricted in bandwidth, but does that make it slower?
-2
votes
0answers
19 views

Wired phone information [on hold]

I am looking for any information about the house home phone. Protocol, any board I can use to make a phone call. I want to make a very simple device which can make phone calls and leave a message, and ...
-1
votes
0answers
35 views

Is there a way to avoid using Breadboard to add Wi-Fi support to a moisture sensor for sending data to Raspberry Pi?

I am very new to IoT, and I want to make a first project of outdoor auto watering plants (one sensor for each plant). So, I bought a Raspberry Pi, several cheap moisture sensors, but I don't know how ...
4
votes
0answers
17 views

Ring doorbell and echo dot interaction

I have a Ring Video Doorbell 2 and an Amazon Echo Dot. I cannot hear the chime of the doorbell throughout my home. There is an Alexa Ring Skill that seems to focus on the video. It technically does ...
4
votes
2answers
32 views

MQTT multiple topics vs. bigger payload

I am wondering about best practices of topic naming and payload design of mqtt messages. Is it better to have multiple and long topic names instead and a bigger payload or short topic name with ...
0
votes
0answers
12 views

In atmega128 bootloader.hex file missing

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.
4
votes
1answer
38 views

How do I build a web application using AWS IoT connecting to a factory floor?

I want to build a web application using aws Iot. I build SCADA systems for different companies. I have a modbus rtu master(raspi) connected to many slaves on a factory floor. Modbus master is ...
4
votes
0answers
9 views

Alexa app: How to choose the device to drop in on

I have multiple Alexa Dots on my account and when using the app on my Android phone I do not get the option to choose which device to drop in on. It constantly defaults to one device. When I try a ...
1
vote
0answers
8 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
votes
1answer
27 views

First steps to learn IoT with watering plants project [on hold]

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
votes
2answers
69 views

By what mechanism are IoT widgets vulnerable to hacking?

I hear news stories that millions of thermostats and fridges have not been properly secured by their manufacturers. I could understand how something running linux with sshd running (as it might well ...
4
votes
0answers
37 views

Is there a Linux distro (à la Open/DD WRT) for smart speakers?

Smart speakers like Amazon Echo or Google Home are starting to become common. Is there a community effort to create an open source Linux firmware that can be run on them? I am thinking to something ...
5
votes
1answer
23 views

Sonoff Dual - Where to find GPIOs

I'm looking for the GPIO's I can use in SonOff Dual ( after flashing my own software ). In SonOff Basic - there are GPIOs to acess LED, Relay, and what is most needed for me - GPIO14 for external ...
1
vote
0answers
20 views

Temperature sensor for PI3 thermostat [migrated]

I’ve been looking for a temperature sensor for my PI3 home thermostat. I’m to the point where my app is stable and running for over 20 days with the only issues relating to the temperature sensors. I ...
1
vote
0answers
30 views

Chevy Cruze 2013-WiFi Hotspot?

Anyone knows if there's WiFi hotspot on the Chevy Cruze 2013? When I tried creating an account for OnStar it says I need to go to my dealership to upgrade my OnStar hardware...has anyone upgraded?
0
votes
0answers
37 views

SIM800C - CME ERROR: 15 SIM wrong & CME ERROR: 10 SIM not inserted [on hold]

I am making a GSM Tracker with SIM800C module. After deploying it into vehicles, it works fine... But after some days, it starts responding as CME ERROR: 15 SIM wrong for command AT+CPIN? & CME ...
0
votes
0answers
62 views

How can I set up IoT Platform for experimenting for the students? [closed]

I want to set up a virtual lab where students should be able to login and get access to an instance to the development platform to write code for web development(For example in HTML, Express JS etc), ...
1
vote
2answers
78 views

What does it exactly mean to say the IoT Protocols are not standardized? [on hold]

It is said that there is no standard for IoT Protocol Communication. What does it mean to say that?
5
votes
1answer
48 views

mqtt publish/subscribe key exchange?

I'm realy a newbie in cryptography, I want to do MQTT payload encryption with AES, i've done it with PyCrypto library, but i'm still wondering how I can encrypt AES key before sending it to the ...
1
vote
0answers
30 views

What is the special function with 4G industrial routers? [closed]

Are 4G industrial routers compatible with 3G and 2G network?
3
votes
1answer
47 views

Remote com (serial) connection through cellular IoT

We need to be able to make a com (serial) connection remotely off site from PLC type device. We have completed a POC for sending some signals to Azure IoT utilizing a Siemens IoT2020 running linux ...
4
votes
1answer
49 views

Simulation tools for centralized, decentralized, or distributed wireless sensor network

I want to simulate the collision avoidance between different objects that use (IoT based) centralized, decentralized, or distributed wireless sensor network. What are free software available to ...
5
votes
2answers
53 views

What are the differences between Modbus addressing zones?

I am trying to implement a control software (client) that communicates with a number of distributed devices (servers) over Modbus. I have been reading device documents to find out where the data I ...
2
votes
0answers
36 views

Create an IoT App for iPhone [closed]

After a year of testing, my IoT project come to an end. It operates mainly on RPI0 using Python code, and ESP32 using MicroPython code, all connected using MQTT protocol running on RPI3. Now i;m ...
4
votes
1answer
40 views

Semantics in IoT and providing better context for data collection

I keep reading the following every now and then: By 2020, there will be almost 50 billion nodes connected to the Internet making IoT an important part of life (paraphrasing here) But even if I ...
3
votes
1answer
38 views

How to configure Wifi on a headless smart device?

I am looking to build a smart device with no external controls (no buttons, display, etc.) and am trying to figure out how to most easily allow a user to supply Wifi configuration to it. A specific ...
4
votes
1answer
26 views

How to register an IoT device to a user account

I'm designing on an IoT device that connects to a web server and publishes/subscribes to the MQTT service. Users download an iOS app to setup/register/use their device. Question: What's the ...
4
votes
1answer
57 views

Philips Hue Out of home control won't log in

I have some Philips Hue bulbs and a Bridge set up in my house. When I am at home the Philips Hue App can connect to and control everything. However, when I am away from home (or simulate such by ...
3
votes
1answer
23 views

Nest cam fallback wifi

If wifi that my Nest camera is connected to goes down, can it reconnect to an alternative wifi? In other words if the "thieves" cut the broadband cable, but I still have a 4G router as a backup, would ...
3
votes
2answers
28 views

Does a battery-powered light switch exist to control a smart plug?

I have an apartment with no light switch or ceiling light for the living room. I have a lamp that's plugged into the wall. Because it's an apartment, I can't just install a physical light switch. All ...
6
votes
1answer
94 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 ...
0
votes
0answers
29 views

HC-SR04 Ultrasonic sensor confliction with LoRa shield

I am trying to send the sensor data (HC-SR04 ultrasonic sensor) from loRa client to LoRa server, but it seems that the loRa has occupied all of the digital pins and does not continue the loop and it ...
6
votes
2answers
104 views

Free MQTT brokers

Are there any limitations ( mainly amount of messages) when using free MQTT server ( such as iot.eclipse.org ), that causes from time to time not to publish messages? I have 2-3 device connected at ...
2
votes
1answer
59 views

Does powering NodeMCU with 3.3 V also power USB-UART module?

I want to power my nodemcu module with 3.3 V. Does powering it with 3.3 V also power USB-UART module? If so I do not want this as it eats the battery.
2
votes
2answers
77 views

NodeMCU connected with batteries stopped working after 2 hours

I connected nodemcu with batteries and uploaded a code which sends http post request every 10 min and goes to deep sleep. But after 2 hours node mcu stops sending the data. Voltage regulator used is ...
6
votes
2answers
147 views

Upload measurements with unix script ( RESTful API?)

A thermostat device returns JSON like data from the command line: curl -s http://192.168.X.Y/tstat/humidity {"humidity":51.00} It would be interesting to setup a UNIX cron job to periodically script ...
4
votes
1answer
35 views

node-red - Metrics display with pm2?

The Node-RED documentation is clear - set metrics to true to track flow execution and memory usage information. So, I stopped Node-RED with pm2, edited the settings.js file and started Node-RED. But, ...
4
votes
0answers
33 views

Dashboard of historical data in iot_datasourse

I have historical data stored in an SQL database as date in the format (2017.10.27 12:00:25) and the corresponding temperature in the format (26.55). I am using the node iot_datasourse to show the ...
1
vote
0answers
78 views

ESP32 - 5V output to operate a Relay

I'm playing around with a new ESP32 flashed with Micropython from eBay in order to replace a Rpi Zero W. Am I missing the 5v output? I need it to operate a Relay. Can a 5vDC Relay be operated as ...
3
votes
0answers
29 views

Fail executing RSHELL to acess ESP32 using Micropython

An ESP32 was flashed with micropython, using esptool on Linux system ( Ubuntu 18.04 ). When I tried to runrshell after installing it, it seemed as it start executing, but did'nt reach to login part - ...
5
votes
1answer
56 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 ...
4
votes
1answer
48 views

How to setup time alarm as a silent vibration?

I've bought a smart bracelet (ID115 by LETSCOM) for its silent alarms as advertised: Wake you up peacefully with a silent alarm. Alarm Alert: Set silent alarms on the tracker to wake you up ...
4
votes
0answers
22 views

Requirement for a mesh network using Zigbee or similar technology

I have a requirement to design a proprietary monitoring system. (There's some intellectual property involved so I'll describe the system with a slightly altered purpose.) Imagine a large factory ...
2
votes
1answer
19 views

mosquitto - bridging options for remote client identifier

From mosquitto.conf, the following options (among many others) exist for bridging. connection name This variable marks the start of a new bridge connection. It is also used to give the bridge a ...
1
vote
1answer
39 views

Could not measure power consumption of ESP8266 module [closed]

I want to measure the power consumption of ESP8266-01. For that I connected my multi-meter in series with ESP8266 to measure the current but then ESP8266 does not power up and multi-meter gives zero.
0
votes
1answer
31 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(...
4
votes
0answers
37 views

Creating nested IoT field gateways with Azure and AWS

From what I have read and understood from their documentation is that only single layer IoT hierarchies can be maintained with either of their gateways. That is a field gateway(sort of like a smart ...
3
votes
0answers
22 views

Alexa App on Iphone 4 / IOS 7.1.2 - Can't find “alexa” button

I have an old iphone 4 that I want to use via wifi in my car to use alexa to play spotify. I installed the alexa app from the app store. Because the last version of IOS for the iphone 4 is version 7....
2
votes
1answer
55 views

How to convert messages between CoAP and MQTT protocols?

I am a master student and my topic is about making protocol conversion among IoT communication protocols for example between CoAP and MQTT in order to make the devices that use MQTT protocol to ...

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