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11 views

Temperature sensor MLX90614 read object temperature above 300°C

I want to make sure the sensor read normally but when i run it to read the object temperature, the result is 382.19°C. I have search for tutorials, and also the error but i couldn't find it except for ...
0
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1answer
22 views

Battery powered MCU with accelerometers and LTE-COMS, looking for products

I've made a question previously but I did not give enough background info so here it goes: I have been developing a prototype for measuring ground vibrations using three MEMS-accelerometers together ...
0
votes
1answer
8 views

Is there a generic way to replace BLE remote with your own BLE controller?

Many smart appliance can only be controlled by the orinigal BLE remote. To control such appliance by your own smart home system, there need to be a way to replace the original BLE remote with ...
0
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0answers
8 views

Moving files from external hard drive to Google Drive

Sorry that I was not able to phrase my question in so many words that it could fit into a title, i.e., "can you move files from an external drive to Google drive without taking up space on your ...
0
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0answers
4 views

How to choose variable type when setting Home Assistant states from AppDaemon?

I have a calculated result from a Python/AppDaemon script running on Home Assistant. I want to display that calculated result on my HA/LoveLace dashboard, so I create a sensor from AppDaemon. ...
0
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0answers
20 views

why TCP session is closed when A6/AI GSM connected to mqtt server immediately?

I use A6/AI GSM module to connect mqtt broker through cellular network. it can open tcp session to server but the session terminate immediately. and gsm try to open tcp session again and session ...
2
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2answers
38 views

MQTT client connect to broker have self signed certification

I run c# MQTT broker (in socket not websocket) with self signed certification for TLS in cloud server and now client cant connect to server and get this error message The remote certificate was ...
0
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1answer
19 views

Can traffic spy see username and password of MQTT client

Can Traffic spy see the username and password of client send to broker when broker don't use TLS ?
1
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0answers
9 views

Measure power consumption of an electric heater

I want to measure / monitor power consumption of an electric heater which is connected to a standard power outlet. There are several meters on the market, however all I found could show only current ...
0
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0answers
13 views

Automatically get APN

It seems that my phone somehow can get APN settings automatically, after inserting my old SIM card to the new phone m.tinkoff in iOS Mobile Data Network menu appeared automatically, and this correct ...
0
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1answer
19 views

Alexa won't turn on/off my lamp anymore

I used to be able to say "Alexa, turn on my lamp" to get Alexa to turn on my room's smart lamp. However, sometime last week, this command stopped working. Now, when I try it, Alexa says &...
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0answers
6 views

Where does Alexa store its music history? Can it be cleared?

My Alexa is screwing up: when I play one of Amazon Music's curated music lists, it always stops after a set number of songs, prior to the whole list completing. It's as if Alexa only thinks the list ...
-1
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0answers
13 views

About 5 question for Checking the thingsboard-based server for specific IoT applications

I have seen one project (here) which use several batches of data to be transferred to the server or received from the server. And so that wants to evaluate the features of the thingsboard site in ...
-1
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1answer
38 views

Copier, Printer & Scanner all in one device - Internet of Things object? [closed]

https://www.google.com/search?q=copier+printer+scanner+all+in+one&oq=&aqs=chrome.0.69i59i450l15.-1j1j7&client=ms-android-lava&sourceid=chrome-mobile&ie=UTF-8 Can Copier, Printer &...
1
vote
2answers
32 views

LoRaWAN device leaving a network and then coming back... what Join behavior to expect?

For smart-city or industrial campus type of projects, there are devices that leave the network for e.g. 2 days (worker leaving on a week-end), and then come back... but they might remain disconnected ...
1
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1answer
25 views

Thingpark Enterprise question on Applications

We've been using Thingpark Enterprise cloud for a while now and we 're facing a difficulty in adding new Application outputs to our existing devices. We 're using MQTT as an output on an existing ...
-1
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2answers
19 views

Guide to connecting generic peripherals

I have some development boards like the FiPy with Expansion Board, mainly to experiment with programming on the processor, but it would be interesting to connect some peripherals (by wire, not ...
1
vote
1answer
26 views

Does anyone else make a product like the Leviton Smart Wi-Fi 4 Button Controller DW4BC-1BW?

I have an x10 system in part of my home that controls outlets that are on separate circuits from the wall x10 wall switches. I would like to put wifi outlet plugs in the existing outlets (removing the ...
1
vote
1answer
29 views

How to call an API using a smart button?

I want to do a simple thing: Give away buttons to my friends that they can click randomly and it simply calls an API that I have implemented. I cannot wrap my head around what should I do and what is ...
1
vote
1answer
18 views

Is a mobile device to IoT device bluetooth connection possible without pairing?

Let's say I have an IoT device in public that needs to be paid to be used, and people will pay and unlock the device with a mobile app. Is it possible to do so over bluetooth/bluetooth low energy ...
2
votes
3answers
45 views

LoRaWAN backhaul overheads over satellite or cellular

LoRaWAN is optimized for the constrained LoRa physical layer, however the gateways add their own overheads when relaying LoRaWAN frames to/from the network servers, and there is also trafic related to ...
0
votes
1answer
11 views

Is there anyway to stream music from an unsupported streaming service to a DLNA enabled amp?

I have an amplifier that supports DLNA streaming. DLNA is not actually supported by the streaming services I use (amazon music, idagio). There are applications out there that are supposed to bridge ...
0
votes
1answer
25 views

Home Assistant Mosquitto Tasmota Device Socket Error

Home Assistant Mosquitto Tasmota Device Socket Error I have just completed a fresh install of Home Assistant OS 6.4 (core-2021.9.7 upgraded to 2021.10.0, supervisor-2021.09.6) on a Raspberry Pi 4, ...
0
votes
1answer
58 views

Can't connect to Mosquitto broker with local IP address

I have a Mosquitto broker running on my Windows machine. I can connect to this on the same machine using an MQTT client such as MQTTX when I specify localhost as the address. However, I want other ...
2
votes
1answer
55 views

What are the datarate and ADR best practices for moving objects

For static objects, LoRaWAN has a very neat 'Adaptive Datarate (ADR)' feature that is key to the scalability of the protocol, it allows the network server to select the fastest uplink datarate ...
3
votes
1answer
64 views

Standalone NFC/RFID with WiFi/ethernet network connection

I spent many hours looking for a device for my iot project. So far, everything I find does not meet my expectations. I prepared two prototypes - one based on rpi zero and one based on esp32, but I ...
0
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0answers
15 views

Will getting a higher category LTE modem/UE increase speed if not maxing out a speeds on a lower category modem?

My particular application puts priority on the speed of the connection (not power), so I'm trying to figure out if a higher category LTE modem will increase speed if we are not already maxing out a ...
0
votes
0answers
16 views

Block GSM communication of a cellular modem with AT commands

I have a cellular modem that supports GSM, 3G and LTE. I want for security reasons to block/disable GSM support, meaning that it will not be able to connect to any GSM BTS. Partial solutions I came up ...
1
vote
0answers
32 views

Samsung SmartThings washer and dryer unable to connect to the app

For the past few weeks I've been unable to use my Samsung SmartThings washer and dryer via the app. I use the notification feature to keep track of completed loads and sometimes use the app to start ...
1
vote
0answers
34 views

Node-red running on DietPi show gpio nodes as not available [closed]

So this, running the latest DietPi (DietPi_RPi-ARMv6-Bullseye) on Raspberry Pi zero W and using node-red-node-pi-gpio to talk to hardware. However after deployment I see this: RPi.GPIO python library ...
1
vote
2answers
50 views

The impact of LoRaWAN repeated transmissions

The LoRaWAN spec defines the LinkADRReq MAC command with a field (NbTrans) specifying the number of requested repeated transmissions of every frame. Actility claims that their ADRv3 algorythm uses ...
1
vote
1answer
25 views

Getting no value from Gravity TDS sensor (analog pin)

I'm using this ESP32 model (picture) with Expressif's DOIT ESP32 Dev 1 library for esp32. And I was trying to use Gravity TDS sensor with DFRobot Gravity library. I set my Analog pin from A1 (Arduino) ...
1
vote
0answers
20 views

How to upload new firmware to Ralink RT5350F board

I took apart old Edimax SmartPlug (model SP-1101W) to find out that the brain of the device is Ralink RT5350F chip conviniently placed on removable module board: The board has two rows of 14 pins (28 ...
0
votes
0answers
19 views

Controlling Alexa Group with Smart Switch

I recently installed a Gosund smart switch for my living room lights. The smart switch works great for turning on and off the outlet that's connected to the switch, and I can tell Alexa to turn it on ...
1
vote
0answers
26 views

Mains circuit phase balancing relay?

I am looking for a device, like a special relay that would allow me to dynamically switch/move some of my home appliances between the 3 phases that I have on my mains circuit. Is this possible? The ...
0
votes
1answer
35 views

Which radio technology for long distance, high(er) power, IP traffic?

I'm looking to build a long distance IP star network using one of the IoT PHY layers but unsure if LoRa is right. An ideal solution would be something to the effect of 915Mhz WiFi or WiFi HaLow ...
0
votes
0answers
21 views

Can I upload 2 code files to a NodeMCU

I have a NodeMCU board. I uploaded blink example for that board and I need to add another example project from the IDE. What happens to the 1st code example or blink example when 2nd code uploaded. Is ...
1
vote
1answer
16 views

4-Channel 16-Bit ADC for Raspberry Pi (ADS1115) - Can I connect two analog sensors?

I have a RP4 and thinking about buying EC and PH sensors from Grove. I've learned that RP4 doesn't have an analog input so I'm thinking about connecting it through ADS1115 from Grove. I'm not sure ...
2
votes
1answer
46 views

Location Solver with LoRaWAN trackers

We use Abeeway Compact Trackers connected via a ThingPark powered LoRaWAN network to track pallets. Our Application Server receives and decodes messages and stores the location coordinates in a DB so ...
2
votes
1answer
38 views

LoRaWAN end-to-end security with Over The Air Activation

We are planning to connect several thousands of door opening and other home security sensors to a public LoRaWAN network country-wide, but our concern is, that in theory our public LoRaWAN network ...
3
votes
1answer
55 views

Firmware update over a LoRaWAN network

We are planning to connect several thousands of LoRaWAN connected water meters. The expected battery life time is 8+ years. Our concern is that meter suppliers are releasing new firmware version ...
3
votes
1answer
33 views

LoRaWAN roaming for overlapping networks

Why shall we consider having a LoRaWAN roaming agreement with another LoRaWAN network operator that has partly overlapping network coverage with our network? Our end devices are fixed (e.g.: water ...
1
vote
1answer
33 views

Can I make individual callbacks to handle each MQTT topic?

I'm using the PubSubClient on some ESP-01 modules to make smart/connected devices around the house. I'm not super fond of the way all incoming messages get routed to the single callback. When I get a ...
0
votes
1answer
46 views

How can I identify what kind of IoT device is in my network?

I am trying to build a system in which IoT devices can connect and are classified without the need for manual checks by the system administrator. In this system, IoT devices will send data, and on the ...
2
votes
1answer
51 views

LoRa inventory application

As far as I know there is no smartphone with Lora builtin compatibility. I'm looking if I can build a inventory solution based on LoRa. Until today the solution was to use the NarrowBand (deprecated ...
0
votes
1answer
25 views

Is there an equivalent to the rsync toolset/protocol for the IoT world

Is rsync suitable for IoT devices to move data from and to the cloud? Is there an equivalent for devices that have an unreliable connection?
-1
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2answers
58 views

Building a string (or char) array - newbie

I pretty new to this and have only been doing it for a few week. Although I have programmed in other languages my understanding of declaring the types, converting types and pointers is still pretty ...
0
votes
1answer
39 views

Looking to automate 2 pool pumps and 1 heater [closed]

So this has been asked here a few times before but I was hoping for some additional wiring help. I have 2 phase 240 VAC connection going to my pool equipment (4 wires) and would like to run the ...
1
vote
1answer
34 views

Publish MQTT message via HTTP GET

I need to make a simple proof of concept, having an Arduino or ESP32 with a couple of LEDs than can be turned on/off via browser. There are a lot of examples about having a small server in the Arduino ...
2
votes
1answer
38 views

MQTT disconnects from AWS when publishing a message

Please look at this sketch for ESP32. It does nothing but: connects to WiFi connects to AWS MQTT subscribes to the /get/accepted topic every 5 s publish an empty message to the /get topic to retrieve ...

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