Posts

Moog Integrated Test Suite Connection error

Image
  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...
Post a Comment
Read more

Raspberry Pi - Single Board Computer

Image
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...
Post a Comment
Read more

Socket Programming with Raspberry pi

 In this setup, the PC act as the server , and each Raspberry Pi (used with 11) should act as a client : Server (PC) : The PC will be responsible for accepting incoming connections from all Raspberry Pis (11 in total). The PC can manage all connections, continuously receive sensor data from each Raspberry Pi, and send control commands to the Raspberry Pis. The server (PC) can efficiently handle multiple socket connections by using threads or asynchronous methods, allowing it to communicate with all Raspberry Pis simultaneously. Clients (Raspberry Pis) : Each Raspberry Pi will initiate a connection to the PC server. They will continuously send sensor data to the PC (e.g., sensor readings) at regular intervals. The Raspberry Pis will also listen for control commands from the PC and act upon them (e.g., adjusting parameters or performing specific tasks). Key Considerations: Sockets : The PC will bind a server socket to a specific port, and each Raspberry Pi will connect to this server...
Post a Comment
Read more

Saturate a soil sample in a cyclic triaxial test

To saturate a soil sample in a cyclic triaxial test, you can gradually increase the back pressure until the pore air dissolves into the pore water. This process is similar to the procedure used in static triaxial tests.  Steps  : 1. Insert two saturated porous discs at the top and bottom of the sample 2. Gradually increase the back pressure 3. Perform saturation checks by elevating the confining pressure 4. Calculate the B-value, which is the change in pore water pressure divided by the change in confining pressure 5. If the B-value is greater than 0.95, the soil is considered fully saturated Additional tips  : 1. Use distilled and de-aired water for flushing 2. Apply cell pressure and back pressure in constant increments 3. Allow the sample to saturate for 10–20 minutes after each increment 4. Check the saturation value after each increment 5. The cell pressure should always be higher than the back pressure 6. The cyclic triaxial test subjects a cylindrical soil sample t...
Post a Comment
Read more

Set Static IP Address for Ethernet Connection in Raspberry Pi OS

For  Bookworm OS: - Click the network icon in the top-right side of the Raspberry pi Desktop. - Click on the advanced option. - Click on edit connections - Select the wired Connections. Double click on it and wired connection window will open. - Go to the IPv4 Settings Tab. - Select Manual from drop-down menu (by default Automatic is selected). - Click on add button. - Enter IP address, subnet mask and default gateway in respective text boxes. - Click on the Save button to save the changes. Now your ethernet connection in Raspberry pi has a static ip address.
Post a Comment
Read more

Autostart an app on reboot - Raspberry Pi

Option 1: pi@raspberrypi:~ $ sudo nano /etc/rc.local #add path before exit 0 line: su - pi -c "sleep 10 && export DISPLAY=:0 && cd "folderPath" && /usr/bin/python3 fileName.py" & CTRL+O  // to save the changes Enter CTRL+X  // to close the file editor pi@raspberrypi:~ $ sudo reboot (To check the autostart of the software app.) Option 2: go to /home/pi/.config create an autostart folder create a .desktop file into this. add path of an autoreboot.sh file to it with delay : app.Desktop file [Desktop Entry] Exec=sh -c "sleep 15; /home/pi/on_reboot.sh" Create a virtual environment myenv add app folder to myenv create a on_reboot.sh file in /home/pi/ folder.  Add following paths into this file: #!/bin/bash source /home/pi/Documents/myenv/bin/activate cd /home/pi/Documents /myenv/MyApp python3 app.py sudo reboot to check the autostart of the software app.
Post a Comment
Read more

Setting up a USB thermal printer with a Raspberry Pi 3B+

It involves a few key steps. Here’s a complete guide to get it working: 1. Gather Required Materials Raspberry Pi 3B+ (with Raspbian OS installed) USB thermal printer USB cable to connect the printer Printer paper Power supply for the Raspberry Pi and printer 2. Connect the Printer Connect the thermal printer to the Raspberry Pi via the USB port. Ensure the printer is powered on and loaded with paper. 3. Install Required Packages Open the terminal on your Raspberry Pi and install the necessary software: Download the driver software for the printer.  Use install.sh file to install it. $ chmod +x install.sh       // make the install.sh file executable $ sudo ./install.sh        // run the install.sh  $ sudo apt install cups libcups2-dev printer-driver-escpr CUPS (Common Unix Printing System) is a printing system that allows the Raspberry Pi to communicate with printers. printer-driver-escpr includes drivers for many thermal printers. 4. Add U...
Post a Comment
Read more