Engineering Concepts

 Sorting Algorithm :  1. Bubble Sort Bubble Sort is a simple sorting algorithm that repeatedly compares adjacent elements and swaps them if they are in the wrong order. This process continues until the array is sorted. Algorithm Steps Compare adjacent elements. Swap them if the first element is greater than the second. Move to the next pair and repeat until the end of the array. Repeat the entire process for all elements until no swaps are needed. Array: [5, 3, 8, 4, 2] Pass 1: Compare 5 and 3 → Swap → [3, 5, 8, 4, 2] Compare 5 and 8 → No swap Compare 8 and 4 → Swap → [3, 5, 4, 8, 2] Compare 8 and 2 → Swap → [3, 5, 4, 2, 8] Pass 2: Compare 3 and 5 → No swap Compare 5 and 4 → Swap → [3, 4, 5, 2, 8] Compare 5 and 2 → Swap → [3, 4, 2, 5, 8] Continue until sorted: Final Result: [2, 3, 4, 5, 8] C code: Complexity: Best Case: O(n) (already sorted) Average Case: O(n²) Worst Case: O(n²) Space: O(1) (in-place) 2. Selection Sort Selection Sort is a simple sorting algorithm that re...

C:\Users\nick> ssh pi@192.168.1.5 @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! Someone could be eavesdropping on you right now (man-in-the-middle attack)! It is also possible that a host key has just been changed. The fingerprint for the ED25519 key sent by the remote host is SHA256:5ATMhAY78GjHr6ty8ODazLE6sCoZohQSJynphxRBh3Q. Please contact your system administrator. Add correct host key in C:\\Users\\nick/.ssh/known_hosts to get rid of this message. Offending ECDSA key in C:\\Users\\nick/.ssh/known_hosts:41 Host key for 192.168.1.5 has changed and you have requested strict checking. Host key verification failed.   Solution : C:\Users\nick> ssh-keygen -R 192.168.1.5 Then run command again to connect via ssh: C:\Users\nick> ssh pi@192.168.1.5

  This error is very common with Moog controllers—even when  ping works , the  Streaming Service (SmartSDK)  may still be blocked or not running. What your error means “Controller cannot access the Moog SmartSdk Streaming Service” So: Network connectivity = (ping works) Application-level communication =  (blocked or service missing)   Step-by-step troubleshooting 1. Check Windows Firewall (MOST COMMON CAUSE) The error itself already hints this. Do this on your PC: Open  Windows Defender Firewall Go to: Allow an app through firewall Look for: Moog PC App SmartSDK / Streaming Service If not listed: Temporarily disable firewall and test: Control Panel → Windows Defender Firewall → Turn OFF   If it works → firewall is the issue  Then add exception for: Your Moog application Required ports (see below)   2. Check if SmartSDK Streaming Service is r...

Introduction The Raspberry Pi has evolved from a hobbyist’s toy into a powerful embedded computing platform. Its versatility makes it ideal for prototyping, IoT applications, robotics, and even industrial automation. In this blog, we’ll explore how to harness the Pi’s capabilities for robust, real-world systems. Hardware Overview Processor : ARM-based SoCs with quad-core CPUs in modern models (Pi 4, Pi 5). Memory : Configurable RAM options (1GB–8GB). Connectivity : GPIO pins, I²C, SPI, UART, and USB 3.0. Networking : Gigabit Ethernet, Wi-Fi, Bluetooth. These features allow the Pi to act as both a controller and a gateway in embedded systems.                                               Raspberry Pi 5 Model, 8GB RAM Types of Raspberry Pi Boards Raspberry Pi makes computers in several different series: Single-board computers (SBCs): The flagship Raspberry Pi serie...