Rantings from a guy with way too much free time

I'm Back!!! Diving into Rust!

2021-04-26 programming Rob Baruch
Noobie to Rust? Let’s get started!! So you want to get into rust? Sure, why not. Let’s do it. The setup Assuming you’re on a Mac, let’s get rust up and running so you’re ready to rip into learning the language. We’ll use rustup to install rust. This is the best way to manage your rust environment and toolchain. Not only can you manage toolchains using rustup, but also add-in components to make the experience a lot more enjoyable. Continue reading

Getting func(y) with Channels

Here’s a little golang puzzle Take a look at the function below that computes a mystery value for the function $f(x)$. Any idea what the function is? Take a close look at the first line where we create a channel. Notice that the channel isn’t some boring int or string channel. No, this is a channel of type func(int, chan int, chan bool). Wait what??? That’s right, this channel takes a function that takes an integer and two channels as function parameters. Continue reading

OS X VPN client pppd host route configuration on post-interface connection

2019-11-20 devops Rob Baruch
VPN Client PPP daemon configuration Recipe: Configure Default Host routes after a specific VPN connection has been established Solution: In order to configure the host (or network routes, although I’m solely interested in routing specific hosts between my two sites), we need to create a file with the following commands in /etc/ppp. #!/bin/sh # VPN_GATEWAY is the remote address of the vpn tunnel # when ppp executes this script it will pass several values to it # $5 will hold the remote gateway VPN_GATEWAY=192. Continue reading

Baby it's Cold Outside -- How Cold? Use an SHT31 and See!

2019-01-29 programming Rob Baruch
ESP32 and SHT31 Temperature and Humidity Sensor Secure Web Server In this blog post, I follow-up on the ESP32-IDF development and demonstrate how to incorporate an i2c device to measure the temperature and humidity. Specifically the SHT31. First, let’s do it plain-jane vanilla. We’ll incorporate the i2c device and simply display the measurements to the serial terminal through the uart. Next, we’ll make it more practical and send the data over the wifi network to a service that makes it convenient to visualize the time-series data. Continue reading

Program the Esp32 with ESP-IDF on Mac OS X

2019-01-23 programming Rob Baruch
Programming the ESP32 on your Mac! Go out and buy yourself a cheap little ESP32 SoC and follow these basic instructions to setup your development environment on your Mac. If you want to do some advanced C-programming to control your ESP32, this is for you. If you’d rather use Arduino and play with simple sketches then this is not for you – google how to use Arduino and off you go! Continue reading

Using Gqrx with USRP SDR's and DSD voice decoding on Mac OS X without losing your mind

2018-12-19 sdr
The Problem: Homebrew formula is a rotten Brew! Over the last few years, using the gqrx package was as simple as using homebrew. However, over late, the keepers of the brew formula hasn’t maintained the build with the most recent gr-osmosdr and Ettus Research UHD Library. So rather than depend on the brew formula, go grab the source and build your own version guaranteed to be up-to-date – and working on your USRP device! Continue reading

Julia Intro

2018-11-07 programming
Juliaet, Wherefore art thou? As Yoda once said… > YAPL - yet another programming language. Learn something new, you must. Why Learn Julia? Julia was designed from the beginning for high performance. Julia programs compile to efficient native code for multiple platforms via LLVM. As such, it’s an interesting programming language to take a look at as it’s a serious contender for certain classes of programming problems; most notibly, scientific and data-centric analysis. Continue reading
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