Questions tagged [wifi]

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

63 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
4
votes
1answer
149 views

Sequencing modes for FCC “Intentional Radiator” test

I'm FCC certifying as an "intentional radiator" a product that uses a custom antenna and off the shelf Broadcom WiFi module. The module has an antenna port, so single-modular and limited single-...
2
votes
0answers
17 views

Easiest way to send basic data from Android to ESP8266 through WiFi

I'm not really familiar with network protocols, but my application is very simple: The ESP8266 is connected to the phone's WiFi hotspot (so they're both on the same network). The phone sends 1 (as in ...
2
votes
0answers
57 views

Time Synchronization between stations over WIFI 802.11n

I'm working on a wireless (2.4Ghz WiFi 11n) project where multiple nodes (ESP32) send very small data to the AP, something like 40 bytes every minute or so. I need to maintain an accurate coordinated ...
2
votes
0answers
370 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?
2
votes
0answers
108 views

How is CC3000 placed in Simple Configuration mode?

I've ordered a CC3000MODR and soldered it to a simple breakout board. In the First Time Configuration it mentions a Simple Configuration mode: The CC3000 is placed in Simple Configuration mode and ...
1
vote
0answers
53 views

Home Router - How do routers use multiple antennas and MU-MIMO?

I have few practical questions regarding classic home routers like TP-Link Archer C2 or modern AX10. I welcome longer explanations if it's necessary. Which type of antennas do home routers use? Are ...
1
vote
0answers
46 views

Data transmission through multiple IoT devices

We are implementing a device which will have multiple sensors inside multiple houses in our local area. Each house will have 1 device fixed at a place and data will be transmitted to one central ...
1
vote
1answer
24 views

What hardware limitations limit the number of stations connected to and access point chip?

I am designing a Linux based embedded access point that needs to support as many connected stations as possible. I understand the first limiting factors like CPU, RAM, and available bandwidth. ...
1
vote
1answer
58 views

Bluetooth and Wifi range onboard a boat

On my sailboat the range of wifi and Bluetooth appears to be very much shorter than in my home - I can't figure out why. ex1: At home I can stream video with Miracast from my basement to a room ...
1
vote
0answers
338 views

How to connect the SIM7600X directly to the nvidia jetson nano

I'm working on modifying the Nvidia jetson nano carrier board to include a network chip like the SIM7600E-H. ~ How do I understand this while connecting this chip to the carrier board . The complete ...
1
vote
1answer
59 views

Unable to use wifi in MPLAB Harmony v3

I just got started with PIC32MZ curiosity development board with MRF24WN0MA Wi-Fi Module and MPLAB Harmony v3. I am unable to find drivers for wi-fi module (including ATWIN1500c) in harmony v3. ...
1
vote
0answers
52 views

Active phased antenna array for Wi-Fi efficiency compared to a directional antenna?

I'm interested in mesh networking of poorly controllable autonomous aerial vehicles (like blimps), so i wonder whether it is viable to use a phased antenna array versus a few traditional directional ...
1
vote
0answers
65 views

Connecting WIFI Module to RJ45 pins output of device

Extreme noob questions here. I have a Lantronix XPico 240 wifi module that I need to connect to the rj45 output pins of a device the device pins are clearly marked but I am not sure about which pins ...
1
vote
0answers
329 views

How can I measure the power given to a USB WiFi adapter's antenna in dBm or mW?

I have an Alfa AWUS036ACH USB WiFi adapter, and would like to know how much power is being given to the antennas (in dBm or mW). The Amazon link to it is here: https://www.amazon.com/Long-Range-Dual-...
1
vote
0answers
150 views

Development of proprietary WiFi protocol

I would like to do some customizations to IEEE 802.11 MAC layer protocol and implement it on hardware. I searched rigorously but I could not find any chipset with 802.11 PHY (RF + baseband chipset) ...
1
vote
0answers
100 views

2x rs232 communication, single wirelss connection, also rs232 to control load cell perameters

I am struggling to find any information on the ability to have 2 rs232 connections with 1 wifi connection. I have found this wireless chip, which supports, five Ethernet ports, two serial ports: http:...
1
vote
0answers
2k views

Why is SDIO used with WiFi chips

SDIO standard is specifically meant for devices like camera that have an SD card. Still in many of the applications I found that the SDIO is also used to interface with WiFi chips. Why is that so? Can ...
1
vote
0answers
1k views

What does Unvarnished Transmission Mode Mean?

I am using an ESP8266 Wifi Module and I have come across a command "AT+CIPMODE=X" which basically sets the mode of the wifi to normal mode if X=0 and Unvarnished Transmission mode when X = 1. I have ...
1
vote
0answers
238 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
vote
0answers
834 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
vote
0answers
174 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....
1
vote
0answers
2k views

Ubiquiti/UniFi PCB component identification and polarity question

I stupidly dropped a brand new Ubiquiti UniFi AP-LR wireless access point on the floor. The impact broke off a component (shown in the picture) from the PCB which is preventing the AP from working ...
1
vote
0answers
476 views

Extending wifi range using Xbee

Is it practical to use Xbee for extending the wifi range of my home router? I thought of the following steps: Providing the router output to an Xbee transmitting unit. Transmit signals to the next ...
1
vote
0answers
2k views

Communicate through a VPN link using Arduino Uart WiFi Module

Following describes the configuration of the system and other details. The problem is mentioned after that. If the initial description is too much or not needed, please skip it. I have a VPN (between ...
1
vote
0answers
904 views

PIC32 read feedback from UART

I'm using a PIC32MX795F512H to set up a Roving RN-131 wifi module using UART. I can communicate with the device but I want some feedback whether my commands are processed or not. I basically need to ...
1
vote
2answers
77 views

Interscatter technology

For anyone familiar with interscatter technology: Can a single device (smartphone) be used to generate the bluetooth packet and receive the wi-fi signal? From the paper it looks like you need a ...
1
vote
2answers
154 views

How same frequency signal with different power are produced?

My router have settings to configure transmission power and as i know energy of a signal is given by $$ E = h\nu $$ where \$E\$ is the energy of the signal, \$h\$ is Planck's constant, \$\nu\$ is ...
0
votes
0answers
23 views

WL1837MOD SDIO Control(or Wifi module in general)

There are a number of wifi module which are controlled by SDIO(as an option). I am using the WL1837MOD as a specific example but I welcome more general answers. All the documentation for this chip ...
0
votes
0answers
26 views

Wireless CAN bus analysis latency

I'm developing a CAN bus to WiFi bridge for car diagnostics using some commercial interfaces but sometimes I see latency can get high and some ECU's does not work, but some others do work, for example,...
0
votes
0answers
21 views

Having trouble setting up a data call via AT Commands and using the wifi chip as a hotspot

I have a WiFi chip embedded on an evaluation board which also has an application processor which runs A-grade Linux, in addition to a modem processor. I want to set it as a hotspot via hostapd which I ...
0
votes
0answers
16 views

Why use both packet detection and symbol time estimation in the receiver of WLAN(WIFI) in 802.11

n IEEE 802.11 Wlan, at the receiver side, we first use packets detection algorithm to detect the start of the packets, and then uses fine symbol timing estimation algorithm to find the start of the ...
0
votes
0answers
31 views

How to model MIMO channel matrix for numerical results

I am willing to include the channel matrix in my analytical model (which only includes pathloss and antenna gains). But from what I have seen, channel matrix can't be used to produce numerical results ...
0
votes
0answers
37 views

How to transmit a packet through WiFi interface with specific data rate?

I am doing a project called 'Device free wireless sensing through WiFi'. In the literatures, researchers using PC and WiFi routers to send and receive packet, the channel state information (CSI) can ...
0
votes
0answers
23 views

ESP32 using BLE but not WLAN

I want to build a little gadget which must use BLE to communicate with a smartphone, but should run for at least 24h using a 500mAh battery. So I think to achieve this, I should be able to switch off ...
0
votes
0answers
25 views

Bluetooth and Wifi Maximum Power limt

I saw below Bluetooth chip comparison of many module , most of all are having 8dbm max power , what I know FCC has 30dbm and CE has 20dbm Max power limit so why Bluetooth module are limited to only ...
0
votes
0answers
31 views

Programming CC3200 Microcontroller and Separate Flash Without a Development Board

I have an "Alfie" device which has wifi and USB, but I never use this device, so would like to change its function. It uses the CC3200 microcontroller (which has a little ROM) and a separate ...
0
votes
0answers
72 views

ESP32 pico D4 SoC(System on Chip) Heat issue

I have designed my own PICO board using PICO D4 SoC with help of the document : ESP-PICO-D4-Datasheet. Everything works perfectly fine except heat is produced when chip is using WiFi functions. I have ...
0
votes
0answers
42 views

Using Telegram bot to get messages from esp32 board

I'm working on a project to light an LED using my phone. I use DOIT ESP32 devkit V1 which is connected to an LED and is controlled by Blynk app via Wifi. I'm trying to write telegram bot which will ...
0
votes
1answer
53 views

ESP32 receive BLE data and send via WiFi possible?

I searched quite a long time now but I'mstill not sure whether it's possible using (just one) ESP32 module. What I need/want: I have some sensors sending their data using Bluetooth Low Energy about ...
0
votes
0answers
34 views

Can I use a WLAN mini pcie card (half or full height) in USB WiFi/WWAN slot?

I have a mini PC which has an mSATA and a USB WiFi / WWAN slot. Below is a picture with the board and its slots. I want to know if there is a possibility to install a WLAN mini pcie card (half or ...
0
votes
0answers
28 views

UDP streaming over WiFi problem when operating outdoor at ground level

I am working with the following setup: I have an SBC running Ubuntu 18. The board is installed on an outdoor device. The board generates a wireless hotspot and runs a python script which streams UDP ...
0
votes
2answers
44 views

Synchronizing 2 MCU's ADCs over WiFi

I have 2 devices with analog signals. I want to acquire their signal with 2 MCU's (preferably ARM). fully synchronized with the same sampling frequencies, starting and ending simultaneously user ...
0
votes
2answers
70 views

Is MIMO equivalent to link aggregation?

Is MIMO the wireless version of link aggregation in wired networks? I'm not asking if MIMO is a similar link aggregation protocol like LACP or PAgP. What I'm asking is, if it is the same concept as ...
0
votes
0answers
27 views

Smarten up dumb device: remotely control 2 TACT switches and read 5 LEDs via WiFi

Got a "dumb" air cleaning thingy that won't leave the house. Now I'm forced to smarten it up since the more expensive model would have it built in but that doesn't look so nice according to others... ...
0
votes
0answers
27 views

Unable to connect Wi-Fi module to local AP using Microchip Harmony framework

I am using PIC32MZ Curiosity development board with MRF24WN Wi-Fi module. I want to be able to set-up Wi-Fi in infrastructure mode and connect to my home router (existing local AP). I am unable to do ...
0
votes
0answers
108 views

Controlling a Wi-Fi relay switch using a “no-neutral” touch wall switch

I'm planning to install touch wall switches in my apartment. They appear to be powered by leaking current through the switched receiver (e.g. a lightbulb) – no neutral connections. I also wanted to ...
0
votes
0answers
65 views

wifi, emi and shielding analog circuit

Hi I am building an USB sound card circuit for raspberry pi. It involves a button, LED and Sound card IC PCM2912A (TI). I am mounting raspberry pi over the 2 sided pcb on top (top has full digital ...
0
votes
1answer
52 views

Video stream over RF and converting to Wifi

So, here is the scenario: I have to put a camera far away from my wifi internet hub and want to see the video on my cell phone. I know that I can put Wifi repeaters, but it's not a feasible solution. ...
0
votes
0answers
94 views

ESP8266 Webserver not reachable after 2 minutes from reset

I have a Keyes Espressif ESP8266 NodeMCU, I have two LEDs that I want to control which are connected to the ESP. When I open the webpage http://10.0.0.5/5 after ...
0
votes
0answers
124 views

ESP32 with LNA and PA

I would like to add a low noise amplifier and a power amplifier to the ESP32. As you may know there is only one RF output on the chip. I was thinking of adding an RF switch, and switching between ...