Internet of Things Stack Exchange
Internet of Things Stack Exchange

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1500 questions
6
votes
1 answer

IFTTT: Use trigger from one applet with ingredient from another applet?

(I'm not sure if an question about IFTTT automation via Android is better suited to Stack Overflow, or Android Stack Exchange, or here, so I figure I'll try here first ...I'm surprised there's no "official" forums yet!) I've been coding for many…
ashleedawg
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1 answer

LTE-M, Cat-M1, maybe MQTT - How is data metered? TCP/IP overhead included?

We're looking at adding an option to our product for Cat-M1 data connectivity. The data plans look interesting, but it's very unclear how the data is actually counted. For example... for these AT&T, Verizon, and T-Mobile plans with 1MB of data,…
darron
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6
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1 answer

Could not ping ESP8266 Wifi module connected to an Arduino

I have been working with a water flow counter which sends data over wifi. I'm using an ESP8266 wifi module. Everything is correctly connected and I've gotten to the point where it's correctly connected to the wifi network and everything, except when…
Alberto Elorduy
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1 answer

node-red - node.error does not stop flow sometimes

I think, node.error does not halt the flow in all cases. My aim is to catch errors, save the payload and stop the flow. Please refer the observations and experiments below. Observation Function node - Neither error is caught nor does the flow…
cogitoergosum
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6
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2 answers

AWS IoT Authentication - Using own certificate not working

I'm trying to set up AWS IoT authentication with using my own certificate according to the docs. I've managed to register a CA, enabled it as well as set it to auto-register. Also, created device cert & key according to the docs. When I first…
haxpanel
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6
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2 answers

Zigbee controlled signal routing?

I'm thinking of a possible way to allow Hue Bridge to command simple signal routing. I find myself rewiring my audio setup a lot and was about to just make a simple passive signal chooser dial box, but because all my other workflows are so smoothly…
user158589
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1 answer

node-red - Units of work

I have a MQTT Input node that kicks of database operations (SELECT and INSERT) for PostgreSQL database. The database operations are done with node-contrib-postgres-multi.Since these operations are separated by function nodes, I am saving portion of…
cogitoergosum
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6
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0 answers

Firewall/NAT for LWM2M

Has anyone got this Firewall recipe to work "For a firewall to support LwM2M , it should be configured to allow outgoing UDP packets to destination port 5683 (other ports can be configured), and a llow incoming UDP packets back to the source …
Gambit Support
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6
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1 answer

Why does Mosquitto not apply access lists correctly?

I tried to apply an access list to a user, but Mosquitto always takes the highest access level and apply it. I tried to apply this: user roger topic readwrite device/1/# topic read device/1/name/ I also tried: user roger topic read…
Anas Naguib
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1 answer

I'd like Alexa to announce a monthly reminder

I'd like Alexa to announce a monthly reminder on the same day each month, but it seems she only knows "weekly", "daily", etc. Is there another way?
polkbwp gmail.com
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6
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1 answer

IoT framework / dashboard with time lapsing capabilities and reusable device definitions?

I would like to implement a dashboard for monitoring device states based on elapsed time. This sounds strange, but actually it's about my fish tank. The filter contains of several materials, each of them lasts for particular time and has to be…
vanilla thunder
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6
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3 answers

Tracking livestock location without GPS or mobile network

Is there a way if I have a paddock 2 km by 2 km I can find the location of my livestock, essentially live tracking their movement? I've thought of possibly giving them a passive RFID tag with antennas around the perimeter but that would only work…
Angus Ryan
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1 answer

How can I write bytes to BH1750 via line buffer IC (ESP32)?

I want to switch data reading from multiple sensors by line buffer IC (74F244). My problem is I can't read anything from sensor when I connect via IC but can when connect sensor to ESP32 directly. I found that endTransmission() in this code return 2…
3ORZ
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0 answers

DragonBoard 410c—Create custom Windows 10 IoT Core image

After reading the MSDN docs about creating a custom Image for Windows 10 IoT Core, I'm totally overwhelmed. I installed the required tools, got the BSP for the DragonBoard 410c and started step by step from the docs I want to create my own image…
andy
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6
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1 answer

WiFi communication between PC and embedded system on LAN

I'm here asking some support for a newbie in embedded communication. My situation is the following: embedded device: STM32L4xx microcontroller + ATWINC1500 wifi module WiFi management code (driver) already written and working My goal: create a…
panc_fab
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