Internet of Things Stack Exchange
Internet of Things Stack Exchange

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1500 questions
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How could I do a HDMI channel mapper?

I have two HDMI displays, and five sources. I want to map them programatically using an arduino e. g. I say I want the first input on the first output and the third input on the second output. And it should also be able to put the same input on both…
tvili999
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Questions about MQTT max message size

I am using MQTT Paho, and I have 2 questions about it: How many words can I send as a payload message? For example, can I send all lines below as one payload? O1000 T1 M6 (Linear / Feed - Absolute) G0 G90 G40 G21 G17 G94 G80 G54 X-75 Y-75 S500 M3 …
Balsam Qassem
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Smallest version of a GPS Receiver searched

I don't know if this is the right place to ask, but I think it is. Short background: I keep losing things temporary. That means I forget my purse at the office (or was it at home?), leave my keys at home(or were they at work?). See? I want something…
monamona
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Solar panel + battery power for IoT device with 802.11n

I've only got basic skills but i am trying to hack together an ESP32 + temperature sensor to send periodic readings out via Wi-Fi. I've managed to get the board to connect to Wi-Fi, read the sensor, send the data, shut down for deep sleep until…
davidgo
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IoT Communication Protocols

I am trying to see the big picture of IoT Communication Protocols. For now, I am not interested in lower levels of communications such as WiFi, ZigBee, Bluetooth etc. I wanna see the possible communication methods or protocols which are upper level…
Creed
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ESP32 & Bluetooth

I'm currently looking into how to set up a sense network made from ESP32s to track BLE tokens in an area, but I'm stuck at the first step... Getting Bluetooth & device listing to work on the ESP32, as I couldn't find usable documentation about…
Meki
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Can I enable interrupts on GPIO16 of ESP8266?

Usually, the gpio16 is not used as gpio. But we can read the state or change the state by writing directly to the registers. WRITE_PERI_REG(PAD_XPD_DCDC_CONF, (READ_PERI_REG(PAD_XPD_DCDC_CONF) & 0xffffffbc) | (uint32)0x1);…
Andrew Romanenko
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Chromecast Doesn't Show Up

Today, I moved my Chromecast from one room to another, and when I tried to connect, my phone couldn't find it. I did a factory reset, but now I still can't find the Chromecast on either my laptop or my phone. This is so bizarre because when I…
DataOrc
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Connect Webpage to AWS IoT to Publish Messages

I want to create an IoT system. My system contains a robotic arm, a CNC machine and a web page. I want to use MQTT in which I can publish from my web page to robotic arm to pick up the object and put it on the table of the CNC machine. My problem…
Balsam Qassem
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How do I get the MAC address of LoRa nodes?

I have some LoRa nodes (a Dragino LoRa Shield to append an Arduino Uno) and I want to connect them with a Dragino Gateway LG01-P. I need to take the MAC address (unique address) of my nodes but I don't know how can do that. How can I solve this?
Hoang
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What are the similarities between traditional internet and IoT (Internet of Things)?

I have found many differences between the two. However I need to find both the differences and similarities. I would assume that content creation is one of them,but they differ in who exactly creates it. Are there any more?
Gregory Wessels
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Edison Ubilinux Flash Error "Cannot allocate memory of size 1610612736"

When flashing command prompt states restarting Edison. Then when it restarts the command prompt disappears quickly and nothing new is flashed on Edison board and message stating to wait 5 mins does not appear and this message appears in flash txt.…
theweekendcoder
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Does Google Home support any NFC use cases?

The IFIXIT Google Home tear-down reveals the Marvell Avastar 88W8897 WLAN/BT/NFC SoC. Are there any known NFC use cases that the Google Home supports? Any announcements from Google if the device will enable a NFC related feature by the way of…
sob
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What's the difference between Jackdaw and KillerBee on RZ Raven USB Stick

What is the difference between Jackdaw and KillerBee on ZigBee USB Stick, both seem to be sniffing packet, but Jackdaw can act as a network interface, and KillerBee is only used for pentest? As far as I understand it, you can't use either to connect…
Terry BRETT
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Wireless Video Doorbell with ability to save recordings on a local server

I've been searching for a wireless (i.e. it has an internal battery) video doorbell which has the ability to save recordings onto a local server. All the ones I could find seem to only offer cloud storage (which I don't want to use due to privacy…
mrnovice
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