transceiver | Channel based event bus with request/reply pattern | Reactive Programming library
kandi X-RAY | transceiver Summary
kandi X-RAY | transceiver Summary
Channel based event bus with request/reply pattern, using promises. For node & browser.
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- debug output
- Example for test files
- Parse the number of milliseconds
- Formats the css style arguments
- Main build function
- Registers a new module .
- Enable namespaces .
- Checks if a given name is enabled .
- Read report .
- Lint files .
transceiver Key Features
transceiver Examples and Code Snippets
Lines of Code : 156License : Strong Copyleft (CC BY-SA 4.0)
Copy frameTensor3D.dispose();
"use strict";
require("@tensorflow/tfjs-node");
const tf = require("@tensorflow/tfjs");
const nodeFetch = require("node-fetch");
const fapi = require("face-api.js");
const path = reqCommunity Discussions
Trending Discussions on transceiver
QUESTION
I am having a problem that I could not find a solution for yet. I collecting some inventory data from devices and get the data like this:
...ANSWER
Answered 2022-Feb-23 at 13:54If the keys are not unique create a list. For example, there are two keys with the same name ASR1001-X
QUESTION
I am periodically reading the temperature and Humidity values from a DHT22 sensor in a green house tunnel.
The sensor is attached to a Arduino Pro Mini. The Pro Mini also has a nF24l01 transceiver attached to it, and the readings are transmitted to another nF24L01/Arduino Pro Mini in my office.
The Arduino is connected to a desktop PC via a USB serial cable.
The intention is to write the received Temperatue and Humidity readings to a file in a CSV format.
I am receiving all the data over the radio link which in-turn is feed to my PC via my USB port. I am running Node with a file called index.js.
Below is the code from the Arduino connected to the PC. It is the receiver side of the radio link.
...ANSWER
Answered 2022-Feb-21 at 11:03I did some changes to my code to check the contents of the const sensorData = tryParseJson(data) as shown below.
QUESTION
I'm aware of many posts regarding these warnings in Chrome dev tools. For all of them, the solution is to turn off notifications "Enable javascript source maps" and "Enable CSS source maps".
What I want to know is how to FIX this and what is the reason under the hood that causes these warnings.
I'm currently developing a Vue JS app that uses Twilio Js SDK
and I'm getting tons of warnings when the app is built in stage mode by using sudo npm run build -- --mode staging
Any advice will be appreciated.
...ANSWER
Answered 2022-Feb-05 at 08:12Twilio developer evangelist here.
Do you need to turn on sourcemaps in webpack, like in this GitHub issue?
QUESTION
- Summarize the Problem:
I wrote a userspace SPI driver in linux for the NRF24L01+ transceiver. My goal is to send files to a server. A jetson nano is the sender, and a raspberry pi 3b+ the receiver. Both the spi and nano are running Linux.
I can consistently send packets and receive acknowledgements.
However, the issue is whenever I send a packet such as 0x ff ee dd 00 cc bb aa the receiver only receives the packet 0x ff ee dd 00 00 00 00. So what is happening is that whenever the first byte encountered is zero, the rest of the packet becomes zero. This causes the files I send to become corrupted.
I was able to reproduce this bug with a char array having a similar pattern. I noticed this trend when I printed out the file contents I was sending on the transmitter and receiver.
- What I've tried:
I've tried altering my SPI read function. What I thought was happening was the chip select line was being flipped high early. This did not work, I got the same results.
I've printed the packets before calling the ioctl() function from the transmitter and the packet remains intact.
I've printed the return value of the ioctl() function to see how many bytes I was receiving and sending. I was sending 31 bytes from the transmitter, and receiving 32 bytes from the receiver. So it doesn't look like my reads and sends are failing.
If I had a logic analyzer my next step would be to check the SPI pins on the transmitter, but unfortunately I don't have one.
I've added a 10uF decoupling capacitor on the transceivers and that sped up communication.
- Show Some Code:
Receiver side:
...ANSWER
Answered 2022-Jan-28 at 01:27I can send files now!
The fix was done in spi_read_msg() function.
The problem was I was converting the buffer received to a string, which caused the data to be trimmed when the byte 0x00 was encountered. This is also equivalent to the null terminating character.
Receiver code:
QUESTION
I have been experimenting with message passing in the Signal Source block in GNU Radio companion. I can see from its source code that we can pass messages to change the frequency, amplitude, offset and phase of the source. For example, the following message PMT sent from a message strobe can change the amplitude of the signal to 0.5.
...ANSWER
Answered 2021-Dec-29 at 13:16This is officially documented:
https://www.gnuradio.org/doc/doxygen/page_uhd.html#uhd_command_syntax
Command name Value Type Description chan int Specifies a channel. If this is not given, either all channels are chosen, or channel 0, depending on the action. A value of -1 forces 'all channels', where possible. gain double Sets the Tx or Rx gain (in dB). Defaults to all channels. power_dbm double Sets the Tx or Rx power reference level (in dBm). Defaults to all channels. Works for certain devices only, and only if calibration data is available. freq double Sets the Tx or Rx frequency. Defaults to all channels. If specified without lo_offset, it will set the LO offset to zero. lo_offset double Sets an LO offset. Defaults to all channels. Note this does not affect the effective center frequency. tune tune_request Like freq, but sets a full tune request (i.e. center frequency and DSP offset). Defaults to all channels. mtune tune_request_t Like tune, but supports a full manual tune request as uhd::tune_request_t. Defaults to all channels. lo_freq double For fully manual tuning: Set the LO frequency (RF frequency). Conflicts with freq, lo_offset, and tune. dsp_freq double For fully manual tuning: Set the DSP frequency (CORDIC frequency). Conflicts with freq, lo_offset, and tune. direction string Used for timed transceiver tuning to ensure tuning order is maintained. Values other than 'TX' or 'RX' will be ignored. rate double See usrp_block::set_samp_rate(). Always affects all channels. bandwidth double See usrp_block::set_bandwidth(). Defaults to all channels. time timestamp Sets a command time. See usrp_block::set_command_time(). A value of PMT_NIL will clear the command time. mboard int Specify mboard index, where applicable. antenna string See usrp_block::set_antenna(). Defaults to all channels. gpio gpio PMT dictionary including bank, attr, value, mask for GPIO. See notes.QUESTION
When I try to execute this code:
...ANSWER
Answered 2021-Dec-16 at 16:00I'm the pathos author. First off, you are using a ParallelPool, which uses ppft... which uses dill.source to convert objects to source code, and then passes the source code to the new process to then build a new object and execute. You may want to try a ProcessPool, which uses multiprocess, which uses dill, which uses a more standard serialization of objects (like pickle). Also, when you are serializing code (either with dill or dill.source) you should take care to make sure the code is as self-encapsulated as possible. What I mean is that:
QUESTION
I have a question during the webrtc test. (client to client) The screen capture frame obtained from Direct3D was transmitted in the webrtc method.
...ANSWER
Answered 2021-Dec-01 at 08:54This is one of the ways to change a bitmap to Texture2D.
QUESTION
I have a compliance board for SFP+ transceivers. For CFP2 transceivers there is some integrated PRBS pattern generator, but I can't find something similar for SFP+ transceivers. Is this even possible using the compliance board alone or do I need an AWG?
...ANSWER
Answered 2021-Oct-14 at 19:02You can send anything you want from an SFP+ module - it doesn't care what you feed it.
You need to turn on the laser and then feed a differential signal to pins 18 and 19. Check SFF-8418 for details.
QUESTION
Is there any way to differentiate between screen share track and camera track in a webrtc video call?
I am able to add both video tracks(camera as well as screen share track) using proper negotiation event.But,I cannot differentiate these 2 tracks (Since they both have property of kind video and their id seems to be randomly generated and is different to the id of actual owner of the track )
I also went through couples of few similar questions that suggested the following things:
1.Differentiating using their ID.
This solution did not work for me because as soon as i will re-share my screen(after stop sharing and then sharing again),a new id will be assigned to the track coming from resharing.
2.Differentiating using transceiver.mid property
This too did not seem to work because while turning off the camera,camera track is removed from the peer instance(to save the bandwidth) and is added back when turning on the camera.This calls ontrack event on the remote side in which track has different transceiver.mid property(not same as what mid property previous camera track had)
In addition,I cannot assign any extra property to the stream obtained from getUserMedia api.track object seems to be immutable.
Please suggest a method which i can use to differentiate these 2 tracks.
Thanks
...ANSWER
Answered 2021-Aug-17 at 17:57As far as I know, mid and rid are the only properties of a track that are preserved end-to-end (the id is not preserved). Thus, your approach of using the mid is probably the correct one.
As you justly note, mids might be recomputed whenever a track is removed from the peer connection. You have two solutions to the issue:
- maintain a mapping between ids and mids, and recompute the mapping whenever you renegotiate;
- never remove a track, and use the
enabledproperty of the track to stop sending video data.
The latter solution is simpler, and avoids the need to perform a round of signalling when the camera is disabled. (When one side sets enabled, the other side should notice and set muted on the corresponding remote track.)
QUESTION
I have a dataset of over 10,000obs that lists detections of 39 fish via a transceiver with a specific serial number for each fish. There is a column of detected tag serial numbers (transmitter_id), a column of date-times of each detection (detection_timestamp_EST), and a simpler column naming the fish by number (Fish_ID), just for graphing purposes.
One tag was with fish "21", up until "2020-11-06 14:05:00," when it was given to fish "39." From this point on, Fish 21 is not in the study.
I'm hoping to change the name of tag "A69-1602-59219" to "A69-1602-59219R" when it occurs after "2020-11-06 14:05:00" so that I can analyze the two fishes' data independently.
This will allow me to use:
...ANSWER
Answered 2021-Jul-14 at 18:23We may use case_when - use as.POSIXct to convert the string to Datetime class
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