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

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51 views

Right wireless tech for 1.5Km with LOS but small-power availability at remote end?

I'm not very experienced in wireless space. I wish to communicate with an Arduino device stationed at the back of my property, roughly 1500 meters away. I have line of sight, although blowing trees ...
0
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1answer
25 views

FCC certification for multiple transmitters

Need help in understanding FCC certification for a IoT device with a Bluetooth module and a WiFi module. The Bluetooth has its own FCC ID, so does WiFi. Both are certified to be modular FCC ...
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0answers
28 views

Creating Customised Board Support Package (BSP) for STM32F479 microcontroller using STM32CubeMx

I am doing a project on wireless holter in which STM32F479 is used as a controller. Currently i am generating code using STM32CubeMx which adds necessary libraries and other drivers like BSP (I am ...
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1answer
51 views

How does the TCP/IP stack interact with Wifi components?

I'm trying to transition beyond Arduino and I'm trying to learn how to use an RTOS (like FreeRTOS) to connect to the web via Wifi. It seems that FreeRTOS and ZentriOS and other RTOS supply TCP/IP ...
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2answers
96 views

ESP8266 Flashing Problem-A fatal error occurred: Timed out waiting for packet header

I have been having some issues with flashing the firmware to my ESP8266 wifi module.I am using Linux OS and using the method illustrated Here to flash the the esp8266. The following are the ...
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2answers
156 views

Indecipherable Data on Serial Monitor

I have ready made working electronic product. I am applying reverse engineering on it. The WiFi module is connected to micro-controller via UART( RX & TX). The android app sends command to WiFi ...
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2answers
49 views

Wireless 2.4GHz to Bluetooth? [closed]

I've been wondering about this for a while; I have a Wireless 2.4GHz keyboard that requires a USB reciever to catch the signal. How great would it be though if I could use it on my phone, for ...
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0answers
45 views

WiFi obscuring 433mhz signal reception

I have a WiFi arduino device with a 5dbi omnidirectional antenna and a 433 mhz receiver board, based on Aurel AC-RX with a 17cm stranded copper wire Antenna both enclosed into the same box. This ...
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1answer
43 views

Using Pulse W3006 Dualband Wifi Antenna with a CPW-G Trace and Single RF_Out on MC

Pulse W3006 Chip Antenna Being Used We are designing a custom PCB which uses a micro-controller with a single RF-out capable of doing 2.4G/5G/Bluetooth. This questions has 3 parts: Using the Chip ...
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2answers
102 views

How can i make a 3.3v ouput from 9v battery? [duplicate]

I'm a newbie in embeded system and basic electronics ,Yesterday i purchased a esp8266 wifi module from amazon along with ftdi usb driver i'm also have an Arduino uno, esp8266 require 3.3 v . Arduino ...
0
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1answer
29 views

RN 171 (RN-XV Wifly) scan and connect to another IBSS Ad-Hoc Network

My setup is as follows: A Raspberry Pi + Realtek WiFi Dongle. It is configured as an IBSS Ad-Hoc Network (SSID = "pi-adhoc"). This works so far. I can find this network and connect to it from my ...
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1answer
68 views

Yagi gain reduction when using off frequency (2.3Ghz WiMax system using 2.4Ghz WiFi Yagi)

I have a new WiMax 2.3Ghz broadband service that has marginal reception. As the frequency 2.3Ghz used is close to WiFi I am thinking I can use a cheap WiFi yagi instead of a much rarer (and expensive) ...
3
votes
1answer
116 views

Why does the 802.11b DSSS signal have 22 MHz of channel width? How does the information get spread over that width? [duplicate]

This topic has got me so much confused. In terms of Wi-Fi, when we say the 802.11b has 22 MHz of Channel Bandwidth, what does it mean? When we refer to a particular Channel No. say Channel 1, it has ...
1
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0answers
61 views

ESP8266 servo controler

I am building a small application, that should be able to connect over wifi to server, pull some data and turn a connected servo accord the result. The system should be powered on battery. Is this ...
1
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1answer
113 views

Transparent Wi-Fi module with RMII input

I need to convert a Ethernet-connected embedded project with wireless connection. I'm looking for a low-cost (main constraint, less than USD $15) and most open-source/-hardware possible Wi-Fi bridge ...
0
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1answer
74 views

Can you use an directional Antenna to sniff packets at a very long distance? [closed]

A normal wifi dongle can be configured in monitor mode to sniff out packets . What determine the range of distance the wifi dongle can sniff out? is it determined by what protocol the wifi dongle is ...
0
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1answer
71 views

Do wireless amplifiers work in both directions?

I'm especially wondering about wifi aplifiers (2.4GHz and 5GHz). I have a couple of very basic questions about them. (I hope this is not too much for a single question): Are there special signal ...
3
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2answers
279 views

ESP8266 WiFi module light switch

Info So I've decided to hop on the ESP8266 WiFi module bandwagon and build a light switch with a couple of differences. 1) the light switch needs to go in the wall and be the same size as the ...
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0answers
50 views

Intel Edison External WIFI/BT Antenna Certification

I want to bring my device with Edison using external WIFI antenna for FCC certification. The test lab asked me how to set continuous Tx and Rx, but I can't find any instruction from Edison developer ...
2
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3answers
127 views

Hardware for IP Camera Project

I intend building a custom IP camera for home use, project goals are: Videos are stored remotely in real time (storage somewhere else in home or cloud server) Live steaming from internet Video data ...
1
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1answer
50 views

Wifi uplink air interface

Most Wifi 802.11 standards use OFDM to achieve high data rates wirelessly. However, I was told OFDM is not suitable for uplink as it requires expensive and inefficient amplifiers which are not ...
0
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1answer
37 views

OFDM with CSMA/CA

Most Wifi standards (e.g. 802.11a) use OFDM for orthogonal frequency multiplexing, i.e. assigning different subcarriers/frequencies to different users. On the other hand, it says CSMA/CA is used to ...
2
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1answer
200 views

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 ...
0
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2answers
101 views

Wi-Fi vs Bluetooth communications to android phone

I am interesting in getting a device, (bare metal micro-controller with sensors), to communicate to an android phone. The device is not wearable and the power difference between Bluetooth and wifi as ...
0
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1answer
77 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
104 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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1answer
74 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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2answers
165 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
votes
1answer
81 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 ...
0
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1answer
127 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
86 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 ...
-1
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2answers
96 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' ...
3
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1answer
65 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 ...
1
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1answer
41 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
153 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
214 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
80 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
votes
2answers
481 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
207 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
129 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 ...
1
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0answers
48 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
votes
2answers
405 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
82 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
95 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?
0
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2answers
426 views

Is cloverleaf antenna good for WIFI?

Is a cloverleaf antenna (that is used for FPV applications) good for home wifi? If not, why?
2
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0answers
846 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
42 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 ...
1
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1answer
81 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
90 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 does....
0
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0answers
67 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 ...