Questions tagged [iot]
For questions about designing systems with Internet of Things (IoT) devices.
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How to do max load management or balancing at home? [closed]
In my house I have:
2 Air conditioners
2 Cooler
1 Refrigerator
1 Chimney
1 Submersible pump (1000 W)
When all turned ON together they consume 5 kW power, I want to ask if there is any way to load ...
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1
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Is it safe to PWM control a consumer smart plug or smart switch?
I was looking at a project that controls the speed of a normal off-the-shelf AC-powered house fan by plugging it up through a consumer smart plug (specifically, the Kasa ones, if that matters) and ...
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Standards for WIFI certification [closed]
Where can I find standards that need to be met for, for example, CE and FCC certification for wifi products?
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How to convert hydraulic pressure gauge into analog output?
Below is the pressure gauge of the heavy equipment. The pressure gauge needle is moved by a hydraulic pressure line.
We are looking to capture the hydraulic pressure into an IoT device that takes an ...
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23
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openOCD not working?
I am trying to use Zephyr RTOS with my board B_L4S5I_IOT01A. After following the getting started guide, I can't flash the .hex file into my board.
This is what the terminal looks like after I tried to ...
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2
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Doing digital IoT and some analog circuits without an oscilloscope
In my free time, I do electronic stuff as a hobby (at least for now.) I don't own an oscilloscope or a fancy multimeter due to the terrible financial state of my country. I am in Iran.
In some ...
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1
answer
60
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Is QSPI pseudo-sram here to stay? [closed]
Doing a new design for a industrial printer that was using an expensive SRAM part on an old Hitachi part. The new Cortex M processor has limited bus pins, and we're thinking of putting a QSPI RAM on ...
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Creating ZigBee RGB Compatible Light - Raspberry Pi
I currently have a Rasberry Pi hooked up to a 64x32 LED matrix. It runs some custom Python scripts to control the colour and display of the matrix, which works great and lets me adjust the settings ...
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Coplanar Waveguide PCB Design for 2.4 GHz signal
I tried to design a layout with 2.4 GHz Wi-Fi signal following coplanar waveguide. As far as I could understand from the online articles and videos, this is what I ended up with -
https://easyeda.com/...
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ST32WL RF Matching Network
I am adapting a minimal design based on the TTN Generic Node. I am trying to reduce the BOM and do not require the option to switch power. In the following diagram there are 4 RF signal I/O pins, 2 ...
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3
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88
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Measuring angled surface with LIDAR
I have been trying to create a sensor that detects when a golf club hits a golf ball. My idea was to have a LIDAR sensor continuously poll the head of the golf club, and return a positive indication ...
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Are SX1276 DIOx pins necessary?
This is about a SX1276 Semtech chip dev custom board:
For this project, is there anything missed when not connecting any of the DIOx pins to my microcontroller? I meant, in my project I have no pins ...
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1
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209
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SIM7020 current consumption way too high
For a project I'm using the SIM7020 Narrowband-IoT (NB-IoT) module to send data to the cloud. The SIM7020 is controlled by an Arduino Pro Micro (ATmega32U4).
Because the sensor is running on a ...
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STM32 Low power series microcontroller or STM32WL series with integrated LoRA? (IoT Device)
I'm starting a design of IoT device. Trouble that I have is deciding which setup to use. I would like to someone with more experience can point me to right direction. With everything that is happening ...
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Providing power to NodeMCU (ESP 8266) from 5V output of an Arduino
Is it possible to power a NodeMCU from 5V output of an Arduino UNO board? I was trying to use the Vin of the NodeMCU as the input from the 5V port of the Arduino. It didn't work. Could anybody please ...
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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 ...
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How long can I power up a nodeMCU
I have a nodeMCU esp8266 and I'm going to power up the nodeMCU as long as possible but I need to know is it good to the health of nodeMCU. In other way I am going to power the nodeMCU forever.(...
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Why are ultra low power microcontrollers 32-bit?
I am learning about ultra low power (ULP) microcontrollers and I've listed some criteria:
Current consumption with only RAM retention (~70nA)
Current consumption with RAM retention + RTC (~150nA)
...
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2
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78
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SCADA communication protocol
I am a software engineer by trait and have very little knowledge of communication protocols inside surrounding PLC's. Not even sure I have a PLC at this point.
I have bought a battery, a quiet big ...
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TPL5110 autoshutoff
I am planning to use TPL5110 (Adafruit breakout) with a LoRa-based soil sensor, to make it energy efficient for battery use. I want to turn on the sensor box after every hour to send data and shutoff ...
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What happened to the M2.com standard?
I just discovered some news articles from 2016 announcing an IoT standard called "M2.com", with quite a few big names supporting it. It was basically meant to be a standard pinout for the M2 ...
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