All Questions
17 questions
2
votes
1
answer
256
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 ...
- 737
1
vote
1
answer
44
views
Why would MKR GSM stop transmitting data to IOT cloud after a certain amount of time transmitting fine?
The device connects to IOT cloud fine and transmits the data for days and sometimes even weeks, but then it will stop transmitting for apparently no reason. On the IOT cloud dashboard the device is ...
- 133
1
vote
2
answers
100
views
Is MQTT a good choice for my application?
For a university project I need to have a couple of "things" that collect data and which we will then be able to view and manipulate.
At the moment each of the devices will consist of a few ...
- 21
3
votes
1
answer
943
views
How to speed up first Mosquitto message?
When sending MQTT messages, first message arrives within 2 seconds and subsequent messages sent within less than 20 secs from first message, arrive in about 0.5 second.
I would like to speed up those “...
- 131
1
vote
1
answer
952
views
MQTT device shows as offline in Home Assistant when connection is established
I'm trying to create a Garage door sensor / motor controller and connect it to my instance of Home Assistant. My broker is the local mosquito on the Raspberry pi.
The device is a Wemos D1 mini with a ...
- 351
1
vote
2
answers
2k
views
How many local IoT, MQTT devices on a single WiFi router?
I am working on a dedicated WiFi network of real-time, IoT devices communicating with MQTT. Messages are very short, approximately 100 bytes. There will be at least 85 devices on the network.
IoT ...
- 111
4
votes
3
answers
4k
views
MQTT - keepAlive using Arduino
I'm using MQTT broker for my IOT devicess, mostly ESP8266 ( some are NodeMCU, some Wemos mini, and some are Sonoff) , running an Arduino code, some time ( about a year ). MQTT broker is running on a ...
- 889
1
vote
0
answers
723
views
What are lower latency alternatives to using MQTT brokers with the ESP8266
I'm experimenting with the nodeMCU board attempting to proto type out an IoT project. My first iteration involved using an MQTT broker to send messages between my computer and the board. Due to the ...
- 119
3
votes
0
answers
164
views
Does MQTT inresponse can cause a reset due to network activity?
Setup description:
I have 8 ESP8266s running an Arduino code to control windows shades up and down using relays, local switches and MQTT for remote operation, which work OK for the past few weeks.
...
- 889
2
votes
2
answers
253
views
Scalable Arduino ESP32 IoT project ( with lots of users )
I'm planning to create a Arduino device that measures distance, and sends the data to AWS IOT via WIFI . After that i want to see the measurements on an Android or iphone App.
How can i make my idea ...
3
votes
1
answer
865
views
MQTT Library for Arduino using GSM
I am developing a vehicle tracking device.I want to send data to server through MQTT from my sim808 GSM module.But I couldn't find any good library of MQTT for Arduino. There are so much resources for ...
5
votes
1
answer
153
views
Efficient Server- and Protocol structure for raspberry, smartphone and 3rd-party-device network
I am new to this forum and this field. I am looking forward to good criticism and tutorials/links/instructing suggestions to build a nice system with as less effort as possible while achieving all ...
- 59
2
votes
0
answers
879
views
How to send data to broker from arduino, sim808 using mqtt protocol
I want to send data from my Arduino ATmega2560, SIM808 using MQTT protocol.
By executing my code, successfully connected to broker but couldn't publish message.
#include "Arduino.h"
int led ...
8
votes
1
answer
455
views
Control arduino via MQTT
I working with several arduino board and now I need to control them via a web interface.
Via web interface I want to activate GPIO.
I have two ideas:
Each arduino acts as web server and I can ...
- 183
2
votes
0
answers
1k
views
Internet of Things: ThingsBoard.io
I am in a middle of an IOT project. I have to design the dashboard. I am facing difficulties in setting up the dashboard. I am using thingsboard.io
I want to know how to send data from thingsboard ...
- 21
0
votes
1
answer
271
views
How to trigger a function in SIM800C Module using an SMS from AWS IOT? [closed]
I am using a SIM800C Module with AWS IoT. I want to be able to trigger some code running on my device by sending an SMS from AWS.
I can generate the SMS OK, but I'm stuck with how to get this to ...
- 25
10
votes
2
answers
687
views
AWS IoT implementation on a low end controller like Atmega328, nrf51822?
I have been using AWS IoT implemented in a RPi for a while. I was wondering if I could use a controller like Atmega328 or some NRF based controllers or STM32 to publish and subscribe to AWS IoT MQTT ...
