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

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0answers
20 views

Microcontroller to Android communication over Wifi [on hold]

Id like to establish communication between a microcontroller and an Android device using Wifi. What things do I need to look at (hardware and software) to achieve this (don't have any idea at the ...
0
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0answers
17 views

IEEE 802.15.4 standerd

According to Wikipedia the said standard defines physical layer and media access control (MAC) control for devices working in the Sub-1 range. However I noted that this standard is not similar to ...
-1
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0answers
23 views

Minimal BCM43340 eval board [on hold]

I'd like to do some testing with the BCM43340 WiFi/Bluetooth module, and I've been looking for a minimal eval board that just has the BCM43340, PCB antennas and everything else broken out. I can't ...
1
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0answers
16 views

HF RFID 13.56MHz Interference from WiFi/BLE 2.45GHz?

If a Wifi/BLE antenna were placed within a multicoil loop antenna for 13.56MHz HF RFID, would there be significant crosstalk/interference?
0
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1answer
36 views

How to connect WIFI module to FPGA board [closed]

I am working on creating a lunar rover to be controlled over wifi so the rover can be controlled remotely. The rover is controlled using a M1A3PL FPGA board with a Actel ProASIC 3 chip. I am trying to ...
2
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2answers
107 views

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 ...
0
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1answer
28 views

Wifi Channel vs a Sub 1 GHz channel of same width

If the same channel-width is allocated for a WiFi channel and also for a Sub-1 GHz channel, would the maximum allowable speed be the same for both channels theoretically? If they differ, what is the ...
0
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1answer
57 views

RSSI measurements near wifi router

I have a question about RSSI and EIRP. When I bring my smartphone very near my antenna wifi router (+20 dBm EIRP) the analyzer wifi application shows me an RSSI level about -20 to -25 dBm (a negative ...
0
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1answer
37 views

How to find out Packet Loss in a Broadcasting environment

Indeed packet loss is an important metric to use when comparing different communication protocols. To me it is understandable how one would computer Packet Loss in a unicast transmission. Simply the ...
0
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0answers
17 views

How can I connect the Canon printer 8-pin WiFi connector to Arduino? [migrated]

I got this from a old printer that my dad had and its model number is K30345 and it says WLAN Module. It also has 8-pins on it for connection. I was wondering if any one knew how to connect this ...
0
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1answer
39 views

Best MCU platform with over-the-air firmware flashing capability? [closed]

I know spark.io is well known for this feature, but I'm searching for alternatives that offer hassle-free over-the-air firmware patching and has also some open implementation examples available. ...
0
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0answers
18 views

hlk-m30 WebClient example

I have started working on HLK-m30 WiFi module. I am developing the simple client on the module using simple AT commands. I have Opened socket TCP client and then Write data using the command. ...
2
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0answers
21 views

802.11 Channel Use Regs

With a 5.8Ghz WLAN device, operating in the upper UNIII band, 5745mhz-5825mhz... ...is it required that if the device is using a standard 20mhz wide 802.11 channel, that you can ONLY be centered on ...
1
vote
2answers
121 views

What chips do 3$ wifi dongles use? [closed]

I saw lots of WiFi dongles withing the price range from $2,50 to $3,50 (eg. this one). I am current doind a project using a microcontroller with usb, that requires WiFi. I'm interested what kind of ...
0
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1answer
61 views

Simple Serial-to Wifi communication

I'm working on controlling an incubator by writing commands to its serial port, a 9 pin RS232. The commands are simple byte strings, such as #02ts. The incubator responses are similar to the ...
0
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0answers
69 views

If my WIFI chip has poor performance at 5GHZ, what does that mean to the end user?

I'm testing my WIFI chip, and it has poor performance at 5GHZ. The transmit power I'm measuring is really low. How does this problem manifest to an end user? Will the internet connection be really ...
0
votes
1answer
52 views

using supermalloy as the core for wifi loop antenna

this is an extension of this question: Why aren't ferrite rod antennas used in WiFi? if you don't want to go through the previous question, then basically i was asking if we can loop wifi ...
7
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2answers
2k views

Why aren't ferrite rod antennas used in WiFi?

Does it have something to do with soft ferrite's low coercivity, still not low enough at gigahertz frequencies? See, I'm putting together high gain receiver antennas and transmitter antennas. Space ...
0
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1answer
74 views

Why can current phones act as Wi-Fi routers, but not as mobile broadband (3G, 4G etc.) routers? [closed]

Many of today's smartphones enable users to share their own internet connection with others via Wi-Fi through tethering. However, from what I understand, current Wi-Fi has much shorter range and ...
0
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1answer
72 views

ESP8266 serial-wifi: antenna options

The cheap ESP8266 boards are offered on ebay with two built-in antenna options: with a PCB trace antenna with a ceramic(?) antenna (PCB photographs see below.) Has somebody bought both and ...
0
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2answers
74 views

How can the 2.4GHz ISM band have 130+ channels?

I am a relative beginner regarding wireless communications protocols and I am looking into the protocols used by toy helicopters, in particular the Hubsan X4. According to more experienced people who ...
0
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2answers
114 views

Using adafruit Flora or Adafruit Trinket + MPU-6050 3-Axis Gyroscope + nRF24L01+ together

I am trying to do a project where I need to transmit data from an object if the object is moved in a particular way. The restriction is that the device has to be as thin and small as possible. I am ...
0
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0answers
29 views

Any parameter other than RSSI in latest wifi standards, which can help estimate distance between wifi AP and endpoint

I have checked and found many references for measuring distance between wifi AP and connected endpoint based on RSSI. But in order to do this, does latest wireless standards produce any parameters ...
0
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1answer
34 views

Access the internal clock on WLAN chips

I am trying to implement a localization method based on WLAN round trip time (RTT) ranging. Some of the papers I have read suggest doing ranging based on the MAC layer RTTs (beacons, ACK, RTS/CTS ...
0
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4answers
89 views

Will having two antennae at the receiver give better reception?

I have a 300mbps router with two antennae (tp-link td-wd8968). I'm building a PC and looking for a wireless network card. I have seen seen cards with a single antenna (150mbps) and cards with two ...
0
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1answer
40 views

How choose MPU for image streaming and transmission

I want to ask how to choose and how much processing power are required to be able to stream video using a wifi module. I'll explain better; I have a camera sensor of 5Mpx, i want to elaborate video ...
0
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0answers
52 views

Bluetooth antenna design

I am building a system with bluetooth/wifi/GSM. Since I am an RF noob, I have some questions regarding antennas. Some modules come with loop antenna and if you want to create your own PCB there is a ...
0
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0answers
61 views

Compare EMF Strength

My mother is extremely sensitive to EMFs (Electromagnetic Hypersensitivity), and I want to help her by turning off Wi-Fi in the house and using some Powerline adapters to replace the Wi-Fi network. ...
1
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1answer
53 views

Power output needed to go through a car

I need to know the power output needed for transmitter if I want that receiver catch this signal? In details, there is a tunnel 4 by 4 meters and a cars in it, cars have a receiver inside and ...
0
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2answers
79 views

Miniaturizing home automation help? [Novice]

Right now I am doing a home automation project and I want to create two things. The first is a device that looks like this but has the capability to also be controlled over wifi using Arduino. I know ...
0
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0answers
55 views

Controlling a wifi outlet with sensor parameters

I currently have a wireless temp sensor that I can monitor via phone or computer, however I'd like to connect this sensor to a wifi outlet that turns on an a/c or heater. In order to prevent internet ...
0
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2answers
86 views

What's an easy approach to provide Wi-Fi/Webserver to mobile phone apps without hotspot

I'm a software programmer and I'm up to start a project of an embedded outdoor device which I will be able to control by any mobile phone. My preferred approach is having the embedded device provide ...
0
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1answer
41 views

WiFi card without host device

So to start I wasn't quite sure about where this question should be asked, so feel fre to relocate it if you want. I'm setting up a system to notify me when a user enters an area. My plan is to use ...
2
votes
1answer
477 views

Connecting external 2.4GHz antenna to Intel Edison

I would like to connect an external 2.4GHz antenna to an Intel Edison. According to Mouser, there are different Edison part numbers for different antenna configurations (internal or external). ...
0
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0answers
43 views

How is 802.11 (Wifi) received signal strength (RSS) measured and reported to software?

I have looked around for a while now to find an answer to this question, but answers I find do not fully answer my question. I found this response interesting from another question on this site. ...
4
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1answer
93 views

ZigBee vs WiFi for wireless communication

I've been working on a product using WiFi. The reason I picked WiFi, is cause I essentially have 20-30 nodes communicating to a main node via a router. This all works very well, and its easy as its ...
1
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4answers
167 views

2.4G signals over single antenna

I want to run run two different 2.4 GHz radio cards off of the same antenna. Is this possible? I was thinking of running both into a splitter and running a single cable to the antenna. The two radio ...
0
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0answers
75 views

Experiment using wifi frequency(Wisee) - SDR is the best equipment?

I'm going to do an experiment using Wifi frequency (2~5 Ghz). I need some equipment to generate and receive this 2~5Ghz frequency. I'm currently quite new to this field (RF) - currently majoring in ...
0
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2answers
130 views

WiFi relay to DC motor

I'm trying to use a 12 volt WiFi relay setup to control a 12 volt DC motor. The WiFi relay has eight 10 A SPDT relays in it and the motor is 15 A. I understand how to wire it directly to the two ...
0
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1answer
338 views

Is there a wifi chip on this board? [closed]

I have a Sony QX10 camera, with comes with built-in wifi. I want to to connect wired ethernet to it. I was hoping I could find a wifi chip inside the camera, and solder to where the ethernet traces go ...
0
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4answers
388 views

Sending signals to PC over wifi

I need a microcontroller that would send statuses of it's input pins (around 5 of them, they can be 0 or 1) to a PC over wifi. I thought of using arduino, but I don't know what would I need to make ...
0
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0answers
53 views

Making a wifi / bluetooth Glove Controler

I want to make a glove (or something like a glove) that would send a signal to a laptop / smartphone when I touch my fingers and thumb. I heard I could connect arduio with a wifi module, but not sure ...
2
votes
1answer
72 views

Dynamic switching of radio: Change between wireless protocols in the 2.4GHz

I want a radio core (transceiver). I want it to work on both the protocols. 802.15.4 and 802.11 I already know of some SoC which has both the PHY layers to work that up. ...
27
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5answers
4k views

Why 2.4 GHz Band?

Bluetooth, WiFi, Zigbee, Remote Controls, Alarms, Cordless Phones etc.. Why all of these protocols, devices, etc. use 2.4 GHz band instead of 3.14 GHz. What is so special about it?
0
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1answer
92 views

Distance confusion about Shuncom SZ05-ADV ZigBee module

I ordered this module looking at the datasheet that it has a range of 2000m LOS distance. But now when I test it, I can receive signal from a maximum of 50m distance! It sends 2.4GHz signals. As far I ...
0
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0answers
128 views

Converting Ethernet hardwire signals to Wifi using RMII interface and embedded bridge module

I have an embedded sensor that has an Ethernet RJ45 cable/connector, which include Tx+, Tx-, Rx+, and Rx- signals that I need to convert to wireless. I need to embed it with the sensor and it needs ...
1
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1answer
64 views

Effect of antenna position indoor and influence of multipath

for my current project I do research regarding indoor-localization and I try to use the RSSI from my wifi to calculate the distance between smartphone and access point. I heared that: ) this ...
1
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2answers
231 views

Is it possible to have an universal RF receiver and transmitter (Wifi / Bluetooth)

First of I should make clear that I'm not an engineer. My friends who are helping me with this project are. But me.. well lets just say I know the basics. Problem I have to be honest, it's a first ...
2
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2answers
87 views

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 ...
0
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0answers
39 views

RN-XV WiFly network connection time

I'm planning to buy this WiFi module: https://www.sparkfun.com/products/10822. I want to use to build a small network sensor (I know WiFi is not the best for low power consumption but I want to give ...