SQL-based AI Inference Engine for Semiconductor Fabs SCP BigQuery joined the fray late as well. It involves binding data with analytics to receive results as a standard SQL query output. However, t...

Purpose I had an old Raspberry Pi 3B (RAM: 1GB) lying around, along with a kit called RaspBot. And like many households, I also had an outdated smartphone—SIM card removed, too old to sell, yet too...

MediaMTX WebRTC to ROS2 /image_raw publisher ROS2 package import rclpy from rclpy.node import Node from sensor_msgs.msg import Image from cv_bridge import CvBridge import cv2 import asyncio imp...

Overview This project documents the development of a DIY autonomous vehicle using ESP32 micro-ROS. Previous experiments included STM32-based balancing robots and Raspberry Pi car kits with Lidar. U...

When working with ROS2 Humble in a mixed environment involving a physical Raspberry Pi and a VMware Guest OS (Ubuntu), the default Multicast-based discovery often fails due to Wi-Fi bridge limitati...

EXIF Orientation Smartphone cameras often store images in a fixed orientation and record the actual viewing direction in the EXIF Orientation metadata. Gallery apps read this EXIF tag and displa...

## 1. Uploading Firmware to ESP32 Before running ROS 2 nodes, ensure the micro-ROS firmware is running on your robot’s controller. Open the micro-ROS project in your IDE (e.g., Arduino IDE or Pl...

1. Introduction: Why Build It Yourself? (Motivation) There are many excellent autonomous robot kits on the market costing well over $1,000. However, for an engineer, the true value lies not in buy...

Introduction to LiDAR and Testing T-mini Plus TOF LiDAR with ROS2 1. What is LiDAR? LiDAR (Light Detection and Ranging) is a technology that measures distances by emitting laser pulses and calcula...

A Very Old RC Transmitter: Hitec Flash 5 The Hitec Flash 5 is an extremely old RC transmitter. By modern standards, it is almost a relic. However, one important feature still makes it useful today...