Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [wifi]

Questions on the implementation of Wi-Fi (802.11) hardware. Note shopping questions are off-topic.

623 questions
26
votes
3 answers

Does Wi-Fi radiation pass through my body?

I'm curious. I think I'm confused because I don't really understand the way ionizing radiation works. So the Wifi radiation passes through my body, but has no ionizing effects within my body?
Frank
  • 273
  • 1
  • 3
  • 5
14
votes
10 answers

Does living next to an electrified railway cause WiFi outages?

Some friends of mine recently moved into their new house (in Belgium.) It is located on a small hill, next to a double-track, electrified railway. Some 2-6 trains pass by every hour, depending on the time of the day. The ground level of the house is…
BennyM
  • 157
  • 1
  • 4
7
votes
0 answers

Which WiFi Module?

We've been battling for a while with the MRF24WB0 wireless (802.11 b/g) module by microchip to finish up a project, and we are now realizing that getting it to work with most routers, and using all the various authentication types like WEP/WPA/WPA2…
DimC
  • 141
  • 1
  • 7
4
votes
1 answer

What size/shape window for a WiFi board inside a metal box?

I'm building a temperature controller comprising a WiFi transceiver, AVR, and two relays, switching 240V (single phase -- I'm in Australia). Because I'll have mains power in the box I want to use an earthed metal enclosure, but my 2.4GHz wifi board,…
Tom Davies
  • 316
  • 1
  • 2
  • 11
3
votes
1 answer

WiFi wave cancellation

Let's assume there is an emitter and a reciver. As the emitter is usually omni-directional, the reciver may get one direct wave and some reflected waves. Why does not these waves influence each other (they might even cancel themselves) and how it…
Paul92
  • 391
  • 3
  • 10
3
votes
1 answer

Avastar SP88W8782 wifi module Pinout 12 pin usb

I just opened a HP wifi driven printer and found an Marvell Avastar 88W8782 Wifi Module with 12 Pin connector to the main board. From googling I found that this is a USB interface driven module but I cannot find a datasheet with any pinout info.…
Flood Gravemind
  • 721
  • 1
  • 7
  • 16
2
votes
3 answers

How do I add a wireless hotspot to my project?

I just read on the description of a YouTube vid that Parrot AR Drone creates its own wifi hotspot. How does it do that? Is it possible to do a similar thing for a UAV project I've been thinking about?
gomek
  • 465
  • 2
  • 7
  • 12
2
votes
1 answer

Wifi throughput and relationship with wifi range

I've a question about how are related Wifi throughput and it's range. For example, if we assume a simply antenna like PCB antenna or ceramic antenna and a wifi frequency of 2.4Ghz, what is a partical rate of Wifi based on your experience? Something…
Singe
  • 617
  • 2
  • 9
  • 22
2
votes
3 answers

Why do wifi channels overlap?

In the United States and Canada there are 11 channels available for use in the 802.11b 2.4GHz WiFi Frequency range defined by the IEEE. But there are only 3 non-overlapping channels available in the 802.11b standard.These are Channels 1,6, and 11.…
Denis
  • 1,265
  • 3
  • 17
  • 36
2
votes
2 answers

Could a network of WiFi routers replace an ISP?

If it could be done, it would. But what are the driving forces preventing a company from creating a device that could connect to numerous other routers/devices and relay the information throughout an entire network assuming the devices are within…
TruthOf42
  • 171
  • 1
  • 5
2
votes
4 answers

Why wifi can not act like a server and client at the same time?

According to my experiments, any wifi card can (naturally) connect to a access point as a client and act as a server (most of them in ad-hoc mode). Why can not a wifi card behave as both a client and a server at the same time? Is there a hardware…
ceremcem
  • 1,426
  • 18
  • 38
2
votes
1 answer

Wifi - Determining the channel of a probe packet

How do applications such as Airodump-ng determine the channel of probe packets they receive? To my understanding, when the receiver is scanning channel 11 it can pick up packets all the way down to channel 6 without much trouble, but these probe…
thanby
  • 155
  • 1
  • 7
1
vote
2 answers

Sending wifi connection info to an unconnected device

Is there a way to use a wifi connected device (phone, tablet, PC...) to send the required connection info (SSID, password) to an unconnected device through the same network? I'm prompted to ask the question after reading the following text from this…
Dave
  • 538
  • 3
  • 11
1
vote
1 answer

How to determine MRF24WG0MA wifi bottleneck?

I have a PIC32 running a MRF24WG0MA (which is a b/g wifi transceiver which supports up to 11MBaud on b and 54Mbaud on g). I have measured the sustained transmission thruput over several minutes at approximately 800 KBaud. I was hoping to get…
monzie
  • 111
  • 2
1
vote
1 answer

How to calculate pi-type impedance matching circuit?

The value provided in the first schematic L=2.7nH, C15=2.0pF, C14=2.7pF, how they will get these values. If I want to design an impedance matching circuit for the same (30+j10) ohm, what process I will follow? it's Related to ESP32 antenna. Sorry…
user234600
  • 11
  • 3
1
2 3