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

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1answer
37 views

Wireless data transmission options for streaming video

I am in the initial stages of planning a project that involves the wireless transmission of data between either an Arduino or Raspberry Pi and a base computer/RPi. Data transmitted includes the state ...
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1answer
56 views

How to determine range of wifi module

I am starting to plan a project that involves either an Arduino or Raspberry Pi (haven't decided yet) connected to a number of sensors. The unit will be located outside, battery powered and will send ...
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0answers
47 views

Should a MacBook emit EMF when wifi and Bluetooth are disabled? [migrated]

I have a couple of MacBooks. Using a Trifield EMF meter with radio/microwave capability, if I hold the meter near the laptop (where I understand the wifi antenna is located), I receive blips ranging ...
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1answer
57 views

Convert USB3 to WIFI [closed]

What methods could be used to convert USB3 communication to WiFi, when there is no access to the device's OS?
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0answers
33 views

serial converter for wifi router [closed]

Is there a way I can add a serial converter to my DIR 615 wifi router? It's to use putty to ...
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2answers
83 views

Design Consideration: Cortex M0 vs Cortex M4 for IoT Applications [closed]

I'm designing an IoT Device with many sensors which are going to be integrated using serial interfaces like UART, SPI, I2C and so on. For communication capabilities, I plan to use Wi-Fi (IEEE 802.11). ...
2
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1answer
41 views

Adding Wi-Fi to a TCP/IP application that is already running with Ethernet

What to do if you have an Ethernet application that is already up and running with TCP/IP functionality and now you want to add Wi-Fi. Most of the Wi-Fi modules available have embedded TCP/IP stacks ...
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0answers
35 views

Can't reflash esp8266 - 12E after many attemptions

I have the following circuit for updating custom firmware to my esp8266-12e module. I've tried many variations for GPIO0, GPIO2, but none of them works. I use the Arduino IDE to make hex files, and ...
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2answers
58 views

Bluetooth based Sensors to the Cloud, processor choice?

This is a pretty broad question, but I'm curious to hear how people would go about this and what parts they would use to do the heavy lifting. Imagine you had a bluetooth module, it works fine and ...
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2answers
32 views

Effect of WiFi hotspot usage on mobile phone circuitry [closed]

Despite the fact that mobile phones come in wide a variaary and form different suppliers and with different software, most mobiles todays have a WiFi hotspot feature that can convert a mobiles' ...
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0answers
47 views

Effect of copper thickness in PCB antenna design

I have been going through TI's design note DN0007 recently which describes the inverted F antenna design supposed to be used with 2.4 GHz systems. This is the antenna I am talking about: Design ...
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1answer
57 views

Effect of bad antenna design on chip behaviour

I have designed a PCB for TI's cc3200 using recommended design specifications. The chip performs correctly when i use functionalities like GPIO read/ write, UART communication, but as soon as i use ...
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1answer
35 views

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 ...
0
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1answer
92 views

What is the best way to connect over 2km distance without line of sight using wireless? [closed]

I need to connect my home internet to the farm. Home has internet connection but farm is in forest area so cannot have internet connection. So I need to setup connection to share my home internet to ...
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votes
1answer
61 views

How do we communicate between a pc and a beaglebone-black using wifi?

I have been working on a beaglebone-black based mini project which involves displaying a GUI on a screen and displaying sensor values. I have been using python to create the GUI and also interacting ...
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2answers
57 views

WiFi access point location estimation

Is there any way to determine accurate position of WiFi access points. I have come across many ways about estimating user's position by using received RSSI but can we find the actual physical location ...
2
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2answers
468 views

What module to look for if I want to tell if there's Wi-Fi in the air? [closed]

I'm working on a mobile device. Essentially it has nothing to do with WiFi communication. It doesn't transmit any data over the air. It has to know however if it's in- or outside of the range of a ...
1
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1answer
87 views

Will this antenna even help?

I am using ESP8266 (esp-07) in a project. I was facing connectivity/range issues with my old router. So, I am planning to use a PCB antenna with esp. This is how it looks: Here is the mechanical ...
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0answers
71 views

Integrated WiFi antenna in metal box (ESP8266 in coffee machine)

I'm currently planning a project involving a ESP8266 inside a coffee machine. However, I do not know if the internal antenna is sufficient to communicate with the outside. Alternativly, I could use a ...
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0answers
45 views

Mechanism of a pringle antenna?

I'd like to DIY a WIFI antenna out of a pringle can. Although there are lots of info online to teach you how to assemble one, but none of them explains the mechanism of it. My questions: 1) What is ...
2
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2answers
249 views

Sending smtp email from microcontroller

This may not be in the right location, so tell me and I'll move it. I am a recent EE grad and I was hired to build a system that exists on a SoC with a simple 32-bit processor. The system basically ...
1
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1answer
46 views

How to avoid multipath noise

I have a device that broadcasts BLE advertisments, I am trying to measure the RSSI level of the broadcasts on another device (I am trying to do indoor triangulation for location estimation) When I ...
0
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1answer
83 views

Bluetooth versus WiFi

Why there are two communication standards, Bluetooth and WIFI? Why not used just one, when they both works in the same 2.4 GHz band?
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2answers
125 views

Is cloverleaf antenna good for WIFI?

Is a cloverleaf antenna (that is used for FPV applications) good for home wifi? If not, why?
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0answers
301 views

Indoor direction using wifi ESP8266 RSSI

Good day. Am trying to build a small device that is able to locate the direction of object indoor . not location, only direction. I bought ESP8266E wifi chip and arduino the ESP8266 is the receiver ...
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2answers
33 views

Ways to communicate GPS coordinates to a central server wirelessly from a wearable device

I am currently looking at designing a wearable device for a client, which can communicate GPS coordinates back to some sort of central server (to then be sent out to other communicating devices such ...
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0answers
56 views

Device Discovery and distance measurement

The goal of my project is to discover devices with Wi-Fi or Bluetooth turned on (not connedcted anywhere) and measure the distance between those devices and my search devices. The search devices will ...
1
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1answer
70 views

Is a Wifi antenna both a transmitter and a receiver?

I only have one antenna on my Wifi card so I am assuming it is both the receiver and the transmitter, but I can't quite wrap my head around it. Does it constantly switch between being a receiver to ...
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0answers
40 views

Looking for replacement of Wi-Fi antenna connector on a PCI card (for soldering)

Yes, I know this site is not supposed to be misused as a shopping site, but there is a good reason I'm asking this question: I don't know what to look for, having tried many search terms to no avail. ...
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0answers
58 views

PIC18F microcontroller supply pins getting shorted when WiFi is running

I am working on a PCB with PIC18F26K22 which connects to a Redpine Wi-Fi module through UART. I initially checked if PIC works with a simple LED blinking program with internal oscillator and it ...
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0answers
45 views

MRF24WG0MA driver

I have a working embedded design that connects to the internet using an ethernet connection. I'm using an MCU that has the Treck TCP/IP stack running on it, wich drives the RJ45 connector but now I ...
0
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1answer
50 views

What exactly is the signal strength seen in API for BT/WiFi receivers?

I understand why dBm is used and how it's calculated and what the usually negative value means. However what I'm interested is of what exactly this measurement is ? Is this the absolute signal ...
0
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1answer
103 views

Is it possible to use a USB Wifi dongle with STM32F429I Discovery board?

I have been using wifi modules like ESP8266 and EMW3162, but this increases the load of work. I would like to use a usb wifi dongle (because discovery board has extra usb interface). Is it possible? ...
0
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1answer
64 views

Mobile WIFI: how close can mobile devices be placed and still have a functional WIFI connection?

I wish to run a large array (50+) of hacked Android phones as a computing cluster. They will need to be networked so I plan to use their built-in WIFI radios to talk over a single WIFI network. (I ...
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1answer
46 views

Radio Control car telemetry

I am trying to get some input on the feasibility of this project. I will have a radio controlled car. The car will have sensors that will output data like acceleration, gyro something like 6DOF. A ...
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0answers
54 views

Transmitting video over short distance to CellPhone

I am finding ways to design and develop a Microcontroller module that includes a camera. The module should be capable of creating a hot stop and send the video to a Cellphone.The resolution of the ...
1
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1answer
131 views

Wi-Fi transmitter/receiver in close proximity: Override interference?

I'd like to control a camera via Wi-Fi (zoom, trigger shutter, etc.), and possibly also capture a live video stream. This will be at an event with a huge number of Wi-Fi devices, and connectivity is ...
0
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2answers
611 views

Power Suppy for Modem Router from 12V Car battery [closed]

How i can operate my modem router (KW58283 300M 11N ADSL2+ Modem Router) on 12V car battery. The Modm router is rated as 12V ,1A. I have this battery. The complete router information are here: ...
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1answer
271 views

AT+CIPSEND problem with ESP8266

Here I am facing an issue with ESP8266 CLIENT Programming. The Problem is with AT+CIPSEND Command. This command is working for few times, but after few cycles, it waits too long for "SEND OK". I have ...
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1answer
1k views

Does Bluetooth 4 or 802.11b/g/n penetrate through walls better?

I'm thinking of building a signal beacon designed to be used indoors. The transfer speed isn't critical but range and penetrative ability are. Does anyone know if Bluetooth 4 or 802.11b/g/n might be ...
2
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2answers
100 views

How to design a metal plate for PCB

I am designing a Esp8266 based WiFi module, and I' not sure if I need one of those metal plates. They are suppose to protect a sensitive area from EMI/RFI, right? Also, how can I design one with ...
-1
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1answer
60 views

Wireless amplifier antenna

There is something like an antenna that works like an amplifier, repeating every signal in the device frequency operation range but wireless. I mean that this "dumb" active antenna receive every ...
-1
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1answer
63 views

PIC18F25K80 and WiFi [closed]

I want to send information over wifi from my PIC to PC. I need some basic tutorials or guides on this topic. I have searched online but there is no tutorial that starts from the basic. Can anyone ...
-1
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2answers
161 views

How do I do real-time streaming of video from a PIC32 with camera/Wifi module onto Amazon S3?

I'm looking at RTP/SIP stacks but don't know where to start. What are Live555, MPEG DASH, oRTP, and ffmpeg? Can they run on a PIC? I'm thinking 720p at 15 or 30 ips. I have code working to upload ...
1
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1answer
120 views

How do you implement wifi with a front-end chip?

I was looking around for a solution to hook up an application with an MCU to a wifi network. I'm basically looking for a chip that can talk to my MCU via an interface like I2C or SPI and is able to ...
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votes
1answer
68 views

What is a safe level of electromagnetic radiation measured in terms of received signal strength indicator (RSSI) e.g. -26 dBm?

We know that the laws of our countries set the regulatory limits of EM radiated power based on the EIRP transmit power of the antennas of devices. However, the received incident power is more ...
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2answers
245 views

Is it a best option to use IRF9540N P Channel Enhancement mode MOSFET for switching 3.3V to my WiFi chip?

I am using IRF9540N P channel enhancement mode MOSFET for switching 3.3V to the power pin of the WiFi chip. The connection is as follows Source --------- 3.3V Drain ---------- WiFi chip power Gate ...
1
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1answer
64 views

Ceramic antenna for wifi applications

I want to ask how to choose correct ceramic antenna for wifi applications. I've very tight space constrictions and I need to use a small smd antenna. Which is the best antenna(characteristics) for ...
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0answers
51 views

Wifi and Bluetooth in single board

I am trying to build a system which will have a USB camera and stream the video via wifi. I am using one of those chinese high speed wifi modules from a company called shenzhen Ogemray. The wifi ...
0
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2answers
1k views

How to request “GET” from an ASP.NET website using ESP8266?

AT+CIPSTART="TCP","zgrdataserver.com.azhar.arvixe.com",80 OK, works. AT+CIPSEND=92 The response is ">". Works fine, but ...