Internet of Things Stack Exchange
Internet of Things Stack Exchange

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1500 questions
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1 answer

How to provisioning tens of thousands of IOT devices to connect to MQTT Server?

I am working on a project where I have a sensor connected to a WIFI module. Whenever the sensor is triggered, it will send a message to the cloud via MQTT. Eventually I tens of thousands of these devices deployed everywhere. These sensors will…
Kian
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1 answer

Connect raspberry pi with 4G

I have a robot (use raspberry pi 3) outside my home (no internet connection there) and I'm with my laptop at home and I want to see the graphical environment (with all applications it has) of raspberry pi. How can I do this? I'm thinking to get…
Nick_Gkoutzas
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3 answers

Wi-Fi smart plugs with no hub or internet access?

Are there any smart plugs out there that connect over Wi-Fi, don't require a hub, and don't use the cloud/don't require an internet connection? The idea is that I should be able to somehow turn them on or off from another trusted machine on the same…
user541686
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PZEM-004 cheaper alternatives

I am an programmer, trying to monitor consumption remotely, I need some form of communication via cable to transmit (even if I trasmit it WIFi later), PZEM-004 for me is very expensive, and I don't need to calculate more than 50A. Other options? By…
Josué Borges
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6
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2 answers

Encrypting sensor data on Raspberry Pi?

I am sending sensor data between two Raspberry Pis via lora. I am using two Lora Radios and NOT using a LoraWan network like The Things Network. How should I encrypt my data? Are there any open source python libraries? Thank you!!
Tuomas Talvitie
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1 answer

How to transfer data over bluetooth between ESP32 and Android?

I have trying to find examples for codes to exchange data over bluetooth between esp32 devkit module and an Android device. I want to use SDP to broadcast a service and then make my Android app connect to esp socket as client. In Linux I have used…
Ryosuke
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1 answer

Is There A Description For the Mosquitto Log Entries?

I have a spreadsheet of about 150 Mosquitto log entries. It is paired with 30 messages I published, matched in time. That is, there are about 5 times as many Mosquitto entries as published items. Many seem to indicate that things I published timed…
PeteC
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6
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What is wrong with this MQTT-SN bridge?

I am using this MQTT-SN bridge, with no changes except that I rigged it to give a hex dump of the buffer if it does not contain a valid MQTT-SN packet. I am experiencing a strange problem: sometimes I find the bridge works perfectly well, and other…
Omar and Lorraine
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1 answer

Can Router-eligible End Devices sleep in Thread networks?

In Thread Stack Fundamentals, the four types of devices in a Thread network are outlined on page 5/6: Border Routers Routers Router-eligible End Devices (REEDs) Sleepy End Devices It is implied by the document that Routers must be able to…
Aurora0001
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2 answers

Enable developer mode in Xiaomi Mi Home App

I would like to use my Xiaomi Gateway v2 EU-Version with openHAB. In order to do that I need to enable the developer mode in Xiaomi MI Home app. These are the full instructions from openHAB: 1. Select your Gateway in the MiHome app 2. Go to the…
Tom
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3 answers

Starting LG Smart TV apps (other than Netflix & Amazon) with Harmony

The LG Magic Remote has dedicated buttons for the Netflix and Amazon apps, and they are built-in commands in the Logitech Harmony vocabulary, so the command list for the LG Smart TV device includes those two commands, and you can easily assign them…
Trey
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3 answers

How can I access data from my In-Home Display?

I have my electricity and gas meters connected to an IHD (In-Home Display), and the IHD is connected to my router. I have access to all of the address of the IHD. I am wanting to get the energy data from the Smart Meters, in order to integrate it…
Sky020
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Build in light switches

We are building a home and I'm thinking to make the home a little smart. This by adding WiFi light switches and maybe a couple of other sensors. Now I'm looking for a light switch that can be build in the wall (like a normal light switch) and that…
JimmyD
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6
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3 answers

Accessing IoT device from remote server using IP address

Is it possible to access an IoT device (which may be a HTTP REST Client or MQTT client) from remote web server over Internet and send text to that particular device (instead of broadcasting message over topic as in the case of MQTT) using the IP…
tim3in
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2 answers

MQTT subscribing is not working

I am working to connect my server to the clients via an MQTT broker. The MQTT client gets connected. But after publishing a message, the subscribe code receives a connection acknowledgment. The on_message() function never gets called. I am stuck…
ron123456
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