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Questions tagged [communication]

Exchange of information between devices. Communication can be wired or wireless.

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How to send large quantities of data via HID

I'm making a 100% customisable mouse, that can be programmed from an app. You program it in a node based language similar to the Unreal Engine 5 interface Your code is encoded to binary, and sent to ...
YANNTASTIC5915's user avatar
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1 answer
37 views

P2P communication: maximum range for low power & low bandwidth

I've started a little side project with the goal of tracking my cat's location in real time. To transmit the GPS-data, it seems like I have two options: I can either use cellular communication or (...
bns's user avatar
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Fingerprint sensor module communication (FPM383 R503)

I'm working on a fingerprint sensor that is known as FPM383. It is much like the well known R503 sensor. Their datasheet and serial communication manual are almost identical. I was trying to control ...
AKTanara's user avatar
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RS232 isolated communication via MAX3250

I have a two diffrent boards. One of the board is send the SoC and other things to Charger Board. While charging progress starts I want to isolate this to device because battery ground is isolated to ...
MSB's user avatar
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ESP32-C3-MINI-1-N4: can't establish Serial connection but can flash code

I've recently build my own dev board utilizing the ESP32-C3-MINI-1-N4 module. Everything works pretty well and just as expected, I can control a few onboard LEDs just fine and upload code and ...
EmilEmilchen's user avatar
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Simplest way to interface a high-speed (125 Msps) ADC: FIFO, RAM, SerDes or FPGA

I have a 1.8 V, 125 Msps ADC (ADS4125) with an output of 12-bit parallel LVDS or CMOS. The system is operating in bursts: the data is sampled for 8 - 30 us, with a 100 ms wait time in between. I need ...
Nitrogen's user avatar
1 vote
0 answers
87 views

CAN bus accidentally swapped TX and RX is it possible to solve (in firmware) without board rework

I am interfacing an isolated can transceiver with my microcontroller. My schematic is given below. Accidently TXD is connected to RXD of microcontroller and RXD is connected to TXD of the ...
Confused's user avatar
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5 votes
5 answers
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Can we save thermal noise?

In communication as you know there is something called thermal noise which is totally random and can mess up your data. There are some encoding stuff for data in order to avoid this. What I wonder is ...
kaan's user avatar
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4 votes
5 answers
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Is it bad to branch off data traces into two separate connectors?

I have a project where some connectors (Ethernet and USB) may need to point in different directions depending on the application (either parallel to, or perpendicular to, the PCB), but it is not ...
GrixM's user avatar
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2 answers
101 views

What is the difference between Main Antenna and Rx-diversity antenna

I am using Quectel SC200 in my design .Below is the description of it's antenna interface. SC200E-CE/-EM/-NA and SC206E-EM/-NA provide four antenna interfaces for the main, Rx-diversity,Wi-Fi/...
Confused's user avatar
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Making wired USB MIDI controller transmit data over Bluetooth

I want to make a USB MIDI controller more practical by passing the data via bluetooth. I'm don't have that much experience with electronics engineering, so I'm coming here ask for advice. Namely it is ...
steve d.'s user avatar
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2 answers
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I2C LOW-level output voltage

I've been confused about electrical characteristics table in I2C specification (Table 10) What are differences between LOW-level input voltage and ...
Emre's user avatar
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1 answer
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I2C slave not ACKing with one MCU but ACKing to arduino Nano

I am trying to communicate with a cypress MCU (at 100kHz) that has been configured as I2C slave with adress 0x48. the document says the following. Now when I send this adress from my Sinowealth MCU, ...
Saqib Sohail's user avatar
0 votes
2 answers
38 views

Interfacing Dual-Channel ADC with Arduino for Wireless Projects

I want to interface a dual-channel ADC (Analog Devices AD4632-16) with an Arduino that offers integrated wireless communication capabilities, such as Bluetooth, BLE, or Wi-Fi. I'm encountering a ...
Morena Fabozzi's user avatar
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37 views

Difference between radio transmitter roll-off and bandwidth-time (BT) product

For any radio transmitter, the output signal will likely have a shape filter to manage bandwidth. However I am struggling to understand the relationship between a roll-off (e.g. 0.35) and a bandwidth-...
toddy's user avatar
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What is the best way to understand if nRF24L01+ still works properly?

I continuously transmit some data from one nRF24L01+ (nRF) to another one. After a long transmission time, I often experience that the transmitter stops its transmission at a random time for no reason....
adba's user avatar
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1 answer
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STM32 - Implementing UART to USB convertor

Considering STM32 Nucleo Boards, implementing a communication by serial port with a computer is a matter of using UART on the Nucleo Board and connecting it to the computer via USB, where you emulate ...
Humphrey Appleby's user avatar
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35 views

SCL line Pulled Low all the time

I have made a custom PCB with nRF52840 and Three slave Devices(IAM-20380 Gyro), (ADXL372 Accelerometer), (VCNL4040 Proximity ) Sensors. All slaves are connected to one I2C Bus When I plug only power ...
Zunuran Nasrullah's user avatar
1 vote
1 answer
126 views

How can I configure RealTek RTL8211F for 100Base-T?

Introduction I'm planning to use RealTek RTL8211F Ethernet PHY. I have an example schematic. Problem The problem here is that the RJ45 Ethernet connector 48F-01GYDXNL is very difficult to get and I'm ...
euraad's user avatar
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Replacing MAX485ESA IC into a RS485 module but not working

I have been struggling a lot with a MAX485ESA IC I bought from aliexpress. What I want to do is replace the component from a rs485 module. For some reason they don´t work and I was wondering if anyone ...
user2808169's user avatar
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33 views

SCI-TX doesnt work properly (Serial communication)

Part Number: TMS320F280025C, Other Parts Discussed in Thread: LAUNCHXL-F280025C, C2000WARE, I have a simulink model for a power electronics project and i want to see detailed data using SCI-TX port in ...
vona's user avatar
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0 answers
26 views

Communication between Microblaze and RTL IP core

I have done an ethernet project (Echo) (TCP/IP) using vivado block design and the board used is Artix A7 and MICROBLAZE PROCESSOR WITH AXI_INTERCONNECT. I was able to use AXI_GPIO connected to an led, ...
Yosh Sinjab 's user avatar
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1 answer
31 views

Comparing between orthogonal BPSK and differential BPSK

Suppose two modulation schemes, orthogonal BPSK and differential BPSK. In orthogonal BPSK, we transmit $$\textbf{x}_{A}:= [x[0], x[1]]^{T}=[1, 0]^{T},$$ and $$\textbf{x}_{B}:= [0, 1]^{T}.$$ This ...
PSH's user avatar
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How do I set up the wiring for a SPX-18572 and Arduino Leonardo to use LoRa?

I was trying to find a guide to use the SparkX LoRa SPX-18572 with an Arduino Leonardo, but I could not find any guides to using these technologies online. I'm hoping someone on here knows how to use ...
Vishnu Sharma's user avatar
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0 answers
37 views

DS18B20 responds with a precense pulse, but doesn't send data

Pretty much the title. I used normal GPIO with direction flipping to do comms. The sensor pin is normally high (from the pullup), and gets pulled low in response to the reset pulse. The data however ...
nottherealfaraday's user avatar
0 votes
2 answers
80 views

SPI slave is sending one byte twice at a very specific time in data packet and causes corruption of the whole data packet

I am trying to communicate with a display device (master) which sends two type of data packets with 50 kHz clock. One data packet is 16 bytes and one is 32 bytes long. The data format is as follows: ...
Saqib Sohail's user avatar
1 vote
1 answer
65 views

How is SM712 TVS array suitable for use with MAX485 in an RS485 driver circuit?

I have an RS485 driver circuit consisting of a MAX485 driven by an STM microcontroller. I was looking at TVS diodes for basic protection from electrostatic surges from wiring and handling, and found ...
nottherealfaraday's user avatar
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1 answer
134 views

max3232 disconnection suddenly - problem

Hi I use a Max3232 chip to connect the RS232 between the microcontroller(STM32F103) and an HMI, the problem is that sometimes this connection will be disconnected and no longer work, this may happen ...
Ashkan Khajeh's user avatar
2 votes
3 answers
146 views

Running communication on low voltage power cables

At work we running seismic stations that are cabled together over distances of several kilometers. The cables have some pairs for power and some for communication. As the stations were installed in ...
MortenSickel's user avatar
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0 answers
45 views

Unable to communicate with SPI based display board

I need to communicate with a display board that is acting as master and my board will act as slave. The reference document says that " Totally 26 bytes for communication between display and ...
Saqib Sohail's user avatar
0 votes
2 answers
358 views

STM32 UART without HAL library

I am writing register level code for STM32F4 & in my code there is a timer for calculation of the frequency of an input signal. I am trying to implement a UART for sending calculated data to ...
MSB's user avatar
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5 votes
3 answers
2k views

Best protocol for daisy chain communication between many small microcontrollers

I'm working on a project where I'd like a large number of small microcontrollers (100+, something like an 8-bit PIC, but flexible on what I use) to each perform audio synthesis behavior defined by an ...
Emmett Palaima's user avatar
-1 votes
1 answer
119 views

Frequency demodulation circuit

This is how I designed the frequency modulation circuit, but I cannot perform the demodulation process. It can be done with a PLL but I couldn't install it. How can I demodulate?
Orhunemre's user avatar
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0 answers
37 views

How to read data from a 6DOF sensor by SPI?

I am new to firmware programing. I have a 6 DOF sensor module and want to connect to a ESP12F development board to read data. Please see below picture for my 6 DOF sensor module. Here are my current ...
RamondC's user avatar
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0 answers
48 views

Why do we get increase in BER with increase in Eb/N0 of the signal?

I'm working on a problem of MSK modulation scheme. I have passed my modulated signal through SUI channel Models and AWGN. But As I want to do analysis on the performance of SUI channels I'm getting ...
Fatima Ismail's user avatar
2 votes
2 answers
267 views

How to compute the energy efficiency in bits/s/watt

The energy efficiency (EE) in wireless communications is usually calculated as the ratio of data rate to power consumption: how many data (in bits per second) are delivered per consumed power (in ...
zdm's user avatar
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7 votes
2 answers
2k views

How is power line communication (PLC) possible without screwing up the line as a viable power source?

[I am not an EE so bear with me with this] I've been learning about power line communication and see that it is mainly achieved by modulating the carrier signal (for this discussion let's say that's ...
Leftover Salad's user avatar
0 votes
1 answer
151 views

Response partly lost in Modbus RTU over RS485 communication

I have developed a Modbus slave which uses ATMega8A and MAX485. In a new lot of the devices, while testing them on my PC using QModMaster, the response that I get has one byte in front of it, and cuts-...
nottherealfaraday's user avatar
1 vote
1 answer
54 views

6GHz GMSL2 signal over UTP, calculating insertion loss over cables

I'm doing some research into having CSI cameras at a distance of around 3m from a computer and am thinking of using a CSI to GMSL2 serializer deserializer pair, in particular, the MAX96724 and ...
Harrison's user avatar
0 votes
0 answers
27 views

Receive Antenna Design Consideration in Dual Antenna LF RFID System

I am working on constructing a loop antenna pair for an LF RFID application. The antenna is quite large (4' x 6'). I was able to successfully wind a transmit (Tx) antenna and tune it such that it ...
tomhebe's user avatar
  • 21
0 votes
2 answers
456 views

Inductor of twisted pair cable and of a wire

I found two calculators on internet for calculating the self inductance of a wire and an other calculator for calculating the inductance of twisted pair. Here are the results for the following ...
Jess's user avatar
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0 votes
0 answers
51 views

Laser communication system to transmit Audio

The audio in these two circuits is only transmitted when they are both connected to the same battery (Vcc), and only the laser control audio level not the transmitting process. When I connect the ...
Alaa's user avatar
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0 votes
1 answer
69 views

What is optical wireless communication? [closed]

What is the term optical wireless communication? According to my point of view, in optical communication there msut be a medium so the refractive index should be capable of keeping the wave inside the ...
Madara Thalpavila's user avatar
2 votes
1 answer
371 views

Does "heat" affect signal integrity?

I have a PCB that is having signal integrity issues. This is a four-layer board, the top and bottom layer is signals and power and the inner two layers is a solid ground plane with no breaks in it. My ...
JoeyB's user avatar
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2 votes
1 answer
572 views

STM32 - HAL_UART_Receive first byte is always zero

I am implementing communication between Nucleo-F072RB board and an evaluation board with TI BQ75614 BMS IC. I have succeeded to communicate with the IC using 1 Mbps UART interface, successfully ...
block3r's user avatar
  • 41
0 votes
3 answers
466 views

Understanding RS422 and choosing drivers

I want to communicate 2 MCUs using RS422. I need to have some isolation, so the driver should have 3.3V side and 5V side, isolated. All I can find in the market are half-duplex drivers, I understand ...
Developing Electronics's user avatar
2 votes
0 answers
49 views

Serial communication between Arduino and computer cuts out after a while and doesn't reconnect. Why?

I've just kept an experiment running the whole weekend. Arduino controlling heat and humidity and sending data over serial to my computer. I had a python program reading Serial data and populating an ...
Popeye's user avatar
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0 votes
0 answers
27 views

Experiments with Screened Lines, the diameter of the inner and outer conductor (RG174)

I am refering the communication engineering related coaxial board. There they used conductive cables as RG174 and I need to find the relative permittivity, diameter of the outer conductor and inner ...
Hasalanka Nagahawaththa's user avatar
0 votes
2 answers
122 views

Token Passing: Multi Master Protocol Initialising problem

I am into developing a protocol using Token Passing topology. For Physical Layer RS485 will be used. All the nodes will be connected in a daisy chain. No node is initially known the address of the ...
Israr's user avatar
  • 249
0 votes
1 answer
235 views

Implementing a light software stack on STM32 to send and receive data using 433Mhz RF modules

I need to send a 12-bit data continuously from one system to another using 433MHz RF modules. The transmitter and receiver systems uses STM controllers (STM32L010F4) which are connected to the radio ...
nottherealfaraday's user avatar

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