Node.js interface for librtlsdr, using FFI-NAPI
Works with modern versions of node (v14-16 etc.), unlike alternate packages on NPM
Only tested on Linux, but if you ask me, I can very easily add windows/macos support.
This module requires librtlsdr. This package in turn requires libusb.
Librtlsdr is a package on most package repositories.
sudo apt-get install librtlsdr-dev
you will need to install librtlsdr on your machine. DLLs are availble on the librtlsdr wiki. These will need to be inserted into a system path folder so that ffi-napi can access them.
npm i rtljs
The package is written in ts and compiled to js, so ts typings are automatically provided with the package.
Using ES:
import * as rtljs from "rtljs";Node require():
const rtljs = require("rtljs");Sample Usage:
console.log(rtljs.getDeviceCount()); // 1
console.log(rtljs.getDeviceName(0)); // Generic RTL R820T2
let device = rtljs.open(0);
device.setCenterFreq(1090 * rtljs.mhz); // 1090000000
// raw IQ data
device.resetBuffer(); // reset buffer to prevent communication data from appearing as radio data
let data = device.readSync(512); // read 512b
console.log(JSON.stringify(data)); // [128, 127, 128... etc
rtljs.close(device);remember to use device.resetBuffer() before using read commands
you probably forgot to use close() in your code to end the device when the program ended. Reset your usb ports and this should now work fine.
TSDoc API available at https://arkanic.github.io/rtljs/
Easy Fixes:
- There are no bias functions at the moment
- ReadGains does not properly access c array, will either not work entirely or will only return the first item
??wtf??:
- cancelAsync refuses to work, likely some obscure multithreading error with ffi-napi (which happens to hate multithreading)
Made by Arkanic
MIT License