Questions tagged [iot]

For questions about designing systems with Internet of Things (IoT) devices.

Filter by
Sorted by
Tagged with
-1 votes
0 answers
36 views

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 ...
user avatar
-1 votes
1 answer
40 views

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 ...
user avatar
  • 103
0 votes
0 answers
26 views

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?
user avatar
1 vote
3 answers
103 views

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 ...
user avatar
0 votes
0 answers
23 views

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 ...
user avatar
0 votes
2 answers
75 views

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 ...
user avatar
0 votes
1 answer
60 views

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 ...
user avatar
  • 174
0 votes
0 answers
39 views

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 ...
user avatar
0 votes
0 answers
60 views

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/...
user avatar
  • 83
1 vote
0 answers
36 views

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 ...
user avatar
0 votes
3 answers
88 views

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 ...
user avatar
-2 votes
1 answer
45 views

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 ...
user avatar
  • 140
2 votes
1 answer
209 views

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 ...
user avatar
1 vote
1 answer
50 views

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 ...
user avatar
0 votes
1 answer
89 views

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 ...
user avatar
0 votes
0 answers
81 views

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 ...
user avatar
  • 207
0 votes
1 answer
87 views

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.(...
user avatar
  • 13
1 vote
1 answer
116 views

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) ...
user avatar
  • 363
1 vote
2 answers
78 views

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 ...
user avatar
0 votes
0 answers
46 views

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 ...
user avatar
  • 1
1 vote
0 answers
88 views

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 ...
user avatar
  • 3,084