Questions tagged [communication]

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

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Two-way(bilateral) signal transmission in telephone lines

Telephone lines have two wires. Probably one of the wires is ground and the other is signal. When I talk on the phone. (For example, I called Mr. John) My voice is probably transmitted as a voltage ...
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1answer
56 views

Cable simplification by replacing them with wireless [closed]

I have a system made of two subsystems: a computer in a cabinet a sliding robotic arm connected to the cabinet. The sliding arm is powered and gets its commands through cables from the cabinet. I ...
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1answer
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MCP2525 not initialized for CAN bus implementation

https://github.com/coryjfowler/MCP_CAN_lib/blob/master/examples/CAN_loopback/CAN_loopback.ino I'm using this library to implement CAN bus and I am using the loopback mode example using a single ...
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1answer
77 views

What value series resistor should I use for USB data lines when two ICs require different impedance values?

I'm using a USB hub (TUSB2036VFR) that communicates with an ATMEGA8U2 and an FTDI chip. The incoming USB signal comes through an isolated USB communications chip ADUM3160BRWZ. The TUSB2036VFR requires ...
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2answers
406 views

SPI modes of data transfer

I am learning SPI protocol in serial communications now. I got stuck with the clock phase and polarity controls concept. Why there are 4 modes available other than a single universal transfer mode. ...
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Consider Noise in Link Budgets

I want to verify the range of my RF-system for a university project. I use two transceivers (Datasheet) and one power amplifier on the transmit side (Datasheet). The target range is 120 km over which ...
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1answer
109 views

FPGA-based SSD host controller without transceivers

Problem: I am looking for options to design a host controller for SSD (SATA or nVME) using transceiver-less FPGA. Question: What are the current state-of-the-art practices of doing such designs? My ...
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2answers
60 views

SCADA communication protocol

I am a software engineer by trait and have very little knowledge of communication protocols inside surrounding PLC's. Not even sure I have a PLC at this point. I have bought a battery, a quiet big ...
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51 views

Transform a UART into a USART with twice as many channels?

I need to provide reliably DAT and CLK lines to a component from a UART - the 16C554. Is it possible to write twice as many bits in an adjacent channel of the UART, alternating between 0 and 1, and ...
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20 views

Profinet Configuration

I'm trying to communicate a PC with SIEMENS s7 1200 cpu 1214 dc/dc/dc via PROFINET. I have not found any source yet. This answer seems useful but I do not know how to create a GSD file. It is written ...
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1answer
61 views

A possible shot in the dark - Seaward HAL-104 Tester experience?

This post might be a shot in the dark, but has anyone here had any experience with the Seaward HAL-104 tester and its remote command protocol functionality? Or perhaps know someone who has? There is ...
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1answer
40 views

Profinet connection between PC and PLC S7 1200

I am trying to create a communication between PC and S7 1200 PLC via Profinet. I have researched many web sites and I could not find any information for me. According to the research, I should use GSD ...
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1answer
79 views

RS485 Reverse Engineering

I'm reversing a RS485 comunication. I have purchased a logical analyzer for reversing and sniffing the data packets. But i have a problem, don't knowing the exactly comunication parameters i can't &...
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5answers
137 views

What is 'Symbol' in communication? [duplicate]

I am just asking about the meaning of "Symbol" in communication. I know that I should search about it before asking, and that's what I did, but the issue is that I encountered many terms ...
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1answer
47 views

How to interface one mini-computer (such as Raspberry Pi 4) to multiple micro-controllers (such as Raspberry Pi Pico)?

I am developing a aeroponics type system which has multiple stacks. Each stack has multiple trays which house the growing plants. I am going to use the Pi 4 as a main control station from where i can ...
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2answers
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RS485 different voltages

Please note that I'm a beginner in electronic... Hello, I've got myself some RS485 modules to test with Arduino and i managed to get them working in half-duplex. From this post I've seen that for ...
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3answers
136 views

How can you transmit 10 Gbit/s using a 250 MHz carrier frequency (Cat 6 Ethernet < 55m)?

I refer to this cable because they also include a test certificate (3rd icon down on left). The cable is tested to 236.5 MHz (250 MHz nominal). Yet it's a Cat 6 cable capable of 10 Gbit/s (if length &...
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Is there a straightforward way to transfer data from a BLE module to my PC?

I'm trying to send some sensor readings from a BLE module (RN4871) to my Windows 10 laptop. I have no problem sending them to my phone and receiving them on a serial Bluetooth terminal. I also have ...
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4answers
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Communication between two microcontrollers using SPI, I2C, and some sort of buffer?

I have two microcontrollers that are both pretty maxed out on their capabilities. MC1 needs to make a 14bit measurement result available for MC2. MC1 can communicate with SPI, and MC2 can communicate ...
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Half duplex bus switching

I would like to design a unit that communicates on CAN bus. The unit will daisy chain the bus using two connectors. I would like to be able to disconnect the second connector, disrupting the daisy ...
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6answers
4k views

Could data transmission power consumption be lessened by transmitting more zeroes?

According to the IEA 250 TWh of power was consumed in 2019 due to data transmission globally, about 1% of worldwide electrical power use. I would like to pose a very simple question regarding power ...
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2answers
98 views

How Mobile Phone Call Works [closed]

This may be a noob question, but I'm having a hard time and confusion finding the answer. How does a mobile phone call work in the mobile phone itself so that analog data (voice) is transmitted out of ...
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6answers
177 views

Simplest way to transmit digital data?

I have an interesting problem that's been wrecking my brain and would like some help with it. Basically what I have is a voltage readout box that has a few voltage displays on it. I would like to ...
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1answer
62 views

CANopen - explanation of TPDO and RPDO

I am working on a project that uses the CANopen protocol. I have a problem with understanding the use of TPDO and RPDO. In some articles, RPDO is described as a request calling TPDO from another node, ...
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3answers
94 views

RS485 medium range communication

Hi, i don’t know if this is the right place to ask but i’m out of ideas so if i need to delete this please tell me. Also, please note that i have little to no experience in electronic so if i make a ...
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1answer
73 views

Communication between PIC18F26K80 and DAC7612

I bought the DAC7612 and would like to make it communicate with a PIC18F26K80 microcontroller. It is specified on the Farnell website that you can use SPI communication, but there is nothing about SPI ...
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1answer
31 views

How can find the bandwidth of the transmitted M-FSK signal?

I'm tried to find the solution, but I failed. my question in the figure below, and the correct answer it's shown at the end of Figure. I'm using this formula but the answer is not correct! Is there ...
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35 views

Minimum value of A to be able to use envelope detector in amplitude demodulation when m(t) includes an exponential

This is one of the exam questions I have come across with. My approach was, To be able to get detected by the envelope detector, $$A\geq |\max(m(t))|$$ Max value of m(t) is 1 right? When t = 0 we get,...
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1answer
77 views

(beginner) I2C slave protocol : basic in bit transmission [closed]

I am studying I2C protocol and have some doubts: I2C and SPI are communication protocols. They work same but I2C has not chip select as SPI. I2C has ...
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59 views

Control of a resonant capacitor

I am working on a data transmission system. For the data signal to be fully amplified, I want the circuit to resonate. I would like the signal to be already fully amplified across the inductors and ...
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0answers
26 views

Difference between 2b1q and 2b1q with paired disparity

I have a question about 2b1q line code. Is there a modified 2b1q code with paired disparity option available? And if yes, which is the coding rule for a simple 2b1q and modified 2b1q code, plus the ...
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1answer
45 views

What is the maximum transmission power of a 4G/5G phone with multiple antennas?

As we know, a user equipment (UE) can transmit its traffic with the power up to 23dbm. However, there is few materials mentions the maximum power a UE can apply if it has multiple antennas. In this ...
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2answers
117 views

RS-485 Connecting 100 devices - Avoid GND Loop

I'm new to community and it's my first question, so please forgive me for mistakes I could do referring to adding pictures and descriptions. I plan to use 100 devices and connect them via RS-485 in ...
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0answers
69 views

why we are using 2 wired connections in can bus

I am software engineer student and I am doing researching about electric cars also how communication works in electric cars. So I was trying to find answer for, why everyone using 2 wired connections (...
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1answer
61 views

Driving LEDs with USB datalines

can I use a schmitt trigger to drive LED with USB data lines D+ and D-? I use a USB2.0 Full speed. Thank you,
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1answer
67 views

With Forward Error Correction, what bit rate should be used in a link budget?

In a typical satellite link budget, you are interested in calculating the Eb/N0, where Eb = S/R_b (Received power times the bit period) and N0 is the simply kT (noise power spectral density). ...
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How can I read the data of all nodes at the simultaneously with LoRa

assume that we have 4 e32 433T30d nodes we are measuring temp and sending to a center point. as a image atteached. I am using arduino. I am using this library with arduino https://github.com/xreef/...
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1answer
107 views

How does analog video transmission work in toy drones?

I'm trying to get a big picture understanding of how video transmission works. How is the video transmitted in FPV transmitters like here? In the specs, it says FM. So is the analog video (NTSC/PAL) ...
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45 views

what does qualcomm MDM6085 do?

This is my first question in this stack exchange. I found my old Reliance Netconnect+ modem and decided to open it up. There is a micro chip with the name QUALCOMM MDM6085 on the top left and EAB857.0 ...
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116 views

Bit Timing Issues With a Software UART

(EDIT a big portion of the original question has been somewhat answered so it is out of date. For a more up to date version of what I am looking for now, please skip to EDIT 2, and use the following ...
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1answer
51 views

Voltage on the serial link

I am using this MAX9278 deserializer. The inputs to the IN+, IN- pins of the deserializer are twisted pair inputs. On the IN+ and IN- serial link, I have 2 AC coupling capacitors of 220nF 50V on each ...
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1answer
55 views

is using both Nyquist's and Shannon's Theorem possible?

For instance, say I have a cable bandwidth of 1 MHz, and a signal-to-noise ratio of 255, how would I calculate the maximum bit rate possible if I were to be transmitting data via this cable using 4 ...
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2answers
59 views

Frequency de-modulation question [closed]

Why is in some cases that the messaged received from the demodulation process has slightly more amplitude then the original message?
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1answer
78 views

Not able to use UART on MSP430F5529LP [closed]

I have my MSP on Com8. Here is my code: ...
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2answers
47 views

What should I consider this circuit?

It's an antenna with LC rasonant circuit. What should I consider this circuit? Is it an AC source, inductor and capacitor all parallel with each other or Is it an AC source, inductor and capacitor all ...
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1answer
68 views

Using the UBT-12HC Serial Bus Motor with Arduino

I recently bought this motor and am trying to figure out how to use it. I also need a driver as this Bus Servo uses omnidirectional Serial communication. That is why I also bought this TTL board. I, ...
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2answers
141 views

Synchronization in digital communication

I am an undergraduate student and studying digital communication systems. I am not able to find any good resource where I can self-study about synchronization and it's types (time, frequency and phase ...
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42 views

Not able to read impedance from AD5933 Eval board using Arduino

I am trying to read impedance information from the AD5933 evaluation board using an Arduino Nano BLE 33. According to the information provided here (https://ez.analog.com/dds/f/q-a/29168/how-to-...
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0answers
19 views

Potentiostat measurements not syncing with main control board

I have quite the perplexing issue I was hoping to get some help with troubleshooting. It involves communication between an Arduino AtMega2560 board that both commands a potentiostat (built using a ...
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0answers
43 views

Is there a protocol like SPI that supports multiple MISO and MOSI channels?

I need to implement a driver that uses clock-data protocol within the data link layer. It's just like SPI but with multiple MOSI and MISO channels. Is there any pre-defined protocol like that? (DMA ...

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