Internet of Things Stack Exchange
Internet of Things Stack Exchange

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1500 questions
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1 answer

mqtt publish/subscribe key exchange?

I'm realy a newbie in cryptography, I want to do MQTT payload encryption with AES, i've done it with PyCrypto library, but i'm still wondering how I can encrypt AES key before sending it to the subscriber, so i choose Python library called PyNacl to…
paulo huigo
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1 answer

Does powering NodeMCU with 3.3 V also power USB-UART module?

I want to power my nodemcu module with 3.3 V. Does powering it with 3.3 V also power USB-UART module? If so I do not want this as it eats the battery.
a-c-sreedhar-reddy
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1 answer

node-red - Metrics display with pm2?

The Node-RED documentation is clear - set metrics to true to track flow execution and memory usage information. So, I stopped Node-RED with pm2, edited the settings.js file and started Node-RED. But, no metric output is seen in the…
cogitoergosum
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Dashboard of historical data in iot_datasourse

I have historical data stored in an SQL database as date in the format (2017.10.27 12:00:25) and the corresponding temperature in the format (26.55). I am using the node iot_datasourse to show the data and the debug message shows the time and the…
Alice Coutinho
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What is the library to be used to implement CoAP in ESP8266?

I am using Arduino IDE to program my ESP8266. I would like to send data from one ESP8266 module to other. So I would like to use CoAP for this communication. Is there any standard or good library to implement CoAP in ESP8266?
a-c-sreedhar-reddy
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5
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1 answer

What is the difference between SPIFFS and EEPROM?

I would like to store some data in esp8266. There are two ways SPIFFS and EEPROM. I can not decide which one to use as both of them saves data. I also read that both SPIFFS and EEPROM are part of Flash drive. So does that mean hardware for both of…
a-c-sreedhar-reddy
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5
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1 answer

Can an AS3539 Sensor be made to "just" report distance to lightning strikes?

I recently added an AS3539 Lightning Sensor to my IoT network, but found out that the sensor reports distance to the closest lightning strike over the last 10 minutes or so, no matter how far away a strike might be right now. This is to denote the…
JD Allen
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Can environmental polluting gas sensors detect emissions of a low speed passing vehicle?

I am thinking to develop a remote-sensing applications for vehicle pollutions. In such cases generally expensive optical IR and UV sensors are used because more precise. On the contrary gas sensors are cheaper but much less precise. Generally these…
Francesco Boi
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How to connect 1 million devices over Layer 3 IP-protocol

I have edited the question after reading about MAC-to-MAC protocol (RMII/MII) here: https://community.nxp.com/thread/316374. My IOT device looks like a USB stick. I am building a datacenter for 1 million IOT devices. Each datacenter is a large room…
Ventures Joe
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1 answer

S3 Actions from ActiveMQ (IoT Core)

I am working on a code for ESP32 which needs to transfers data that is sent via MQTT to AWS S3 storage. Can Someone help me out on how I can achieve this ? I have setup the the client and AWS broker as well. I need help to transfer messages to S3 by…
Hitesh Pratyush V
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Solutions to secure MQTT-SN over UDP with DTLS (or alternatives)

We want to secure the transport of MQTT-SN messages send over UDP e.g. with DTLS. Searching the internet showed that there are considerations and activities on using DTLS to secure the transport of MQTT-SN messages over UDP but there doesn't seem…
xwoker
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AWS IoT Enterprise Button setup fails during Wi-Fi configuration and can't connect

IoT button is able to connect to home Wi-Fi but not corporate Wi-Fi networks. Fails to connect to WPA2-Personal as well. What kind of Wi-Fi networks does the AWS IoT enterprise button support and can connect? We have been trying to perform claim…
vrkmajeti
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Websockets with Mongoose on ESP-IDF

I'm trying to use the websocket_chat_client example on ESP-IDF platform but the value of status on MG_EV_CONNECT event is always -1, which is a Connection error. What I've done so far is I took the esp32-idf example, merged it with the…
haxpanel
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1 answer

Connecting a SIM800L to a IBM BlueMix Server via MQTT

I am trying to connect a IoT node to a IBM IoT server via MQTT/GSM. I am using a Sim800L GSM module, and a serial USB device to send the commands to module from my computer. Later on, I will use the commands on Arduino to register my device. I'm…
codemonkey
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SSL/TLS connection to Mosquitto broker from Android app

I have configured the mosquitto mqtt broker on a raspberry pi via this link SSL/TLS Client Certs to Secure MQTT I have the ca.crt,client.crt and client.key. How do I use them in android? It would be really nice if someone could help me out here
Hitesh Pratyush V
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