Selecting USB to RS232 adapter via USB hierarchy path

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Android Learning Apps

Mathematica Read more

Mathematica – Useful Functions

Extract coefficients from symbols Sin[x 2] and Cos[x 2] Find derivative of some exp Combine two expressions into system of linear equations Clear all global variables Collecting terms Read more

Cross Compiling ARM64 binary on X86_64

https://github.com/elastic/golang-crossbuild Read more

Useful Equations

Law Equation Notes Kirchhoff’s Voltage Law (KVL) Σ v_i = 0 or v_source = v_R + v_L + v_C + ... Sum of voltages around any closed loop equals zero Kirchhoff’s Current Law (KCL) Σ i_in = Σ i_out Sum... Read more

Controlling USB Hub Port Power Via Rust on Linux

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Running VyOS from withing Docker container

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Configuring Linux GPIO Using Bash

Enumerating GPIO devices Configuring specific GPIO pin as output Read more

Analyzing PostgreSQL log insert performance

The goal of this test is to see how PostgreSQL behaves with heavy insert load of logs.The PostgreSQL (15.8 (Debian 15.8-0+deb12u1)) is running within KVM VM with 2 cores and further restricted via cgroupv2 cpu.max parameter set to “25 100“,... Read more

Sharing Linux serial port over network

On server On client Read more