Questions tagged [wireless]

For questions about non-wired communication in IoT devices, particularly where you do not have a specific protocol or transport in mind.

12 questions with no upvoted or accepted answers
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Send wirelessly very small amount of data

I need to transfer wirelessly a message of maximum 5 bytes of data (including everything such as start bits, stop bits etc etc). What I tried: Empty Ethernet package is at least 56 bytes according to ...
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297 views

Creating COM serial port between external device (Joule/Arduino/etc.) and PC over Bluetooth w/ linux sdptool & rfcomm (OR another method)

This article is not device specific, but rather is focused on using sdptool and rfcomm to setup a serial com port connection over bluetooth. If you have another method instead of these two Linux ...
4
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0answers
150 views

MOXA Modbus with Raspberry Pi – Can't get slave to work

I have two Moxa modbuses that I have daisy-chained together, and then connected to my network's ethernet port. The modbuses are hooked up to a control board with LED lights for the coils and buttons ...
4
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0answers
52 views

Remote control old intercom

My brother has a motor disability and lives in my parents house. He uses an wheelchair and operating the intercom is way too difficult for him. I was thinking to mount an RF relay switch, but ...
3
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0answers
145 views

Using RPC in IoT environments

I would like to use RPC for communication between fog nodes. As the connection between the nodes is wireless (802.15.4), I don't want to use an RPC framework that uses HTTP (like gRPC). I know that ...
2
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0answers
360 views

How to take data from multiple BLE devices into a central device simultaneously?

Firstly, I am very beginner in BLE domain. I have very little knowledge about it. I have Adafruit Feather 32u4 Bluefruit LE module. I want to do a project where multiple BLE peripheral devices ...
2
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0answers
34 views

Industrial programmable radio transceiver

(I hope this kind of questions are tolerated here. Otherwise, please say it in the comment and I will delete the question) I have to create a wireless network of over 200 devices, placed in the same ...
2
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0answers
48 views

Sigfox Callback CustomValue's issue Sending NULL instead of wanted values

I'm working on a project, and I want to use a Sigfox callback to send some data. But when I want separate my payload as I coded it, all my values on Callback are NULL. This is my Callback, and this ...
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37 views

How to send GPS coordinates to a SQL database from my GPS+GSM device?

I'm getting ready to start building a simple wireless GPS device. This device will use an arduino, and a cellular GSM module paired with a GPS device (an example is the SIM5320a aka the FONA 3G from ...
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20 views

RF interference for ultra low power wireless device

Is it routine and/or has anyone performed tests on active interference when developing ultra low power wireless devices? You area going to test range of your device and tune your antenna/matching ...
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28 views

Most efficient wlan module for a bunch of rcars

I want to build up a rc car on my own which I can connect/steer via an app - either smartphone or computer. Not decided, yet. I also want to use multiple cars, each for a friend so let's say in the ...
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23 views

Suggestion between bluetooth and wifi for a simple sensor reading application

So I have a simple application that involves reading the input over terminal via UART, and then responding accordingly, be it toggling an LED or outputting a sensor reading over I2C. As a step up, I ...