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Sunday, February 13, 2022

Azure Sphere Samples - Blinking blue led

Updated post from 9/7/2019 

How to change from red, to green and blink the blue led on the Azure Sphere MT3620 starter kit. 

  • Azure Starter Kit
  • Microsoft Visual Studio
  • Watch YouTube Video (recommended for connection)
  • GitHub files
  • or Azure Blink Template
Photos credit: Bits4Bots LLC. Azure Sphere Starter Kit
So, the correlation to the RBG pins are 8, 9 , and 10. This change must be made in first the header of the .C file and the .C file itself.
This is assuming you already have your board in azsphere device prep-debug mode in the CMD window.
******************************************************If you are looking for an easy way to get going with the starter kit you're in luck! I recently started playing with the kit myself and was successful in the HelloWorld blink test. In the Azure sample code the GPIO color choice is red of the RBG.
There is also a YouTube video by Hackster that shows the code for GPIO 9, which is the green of the RBG. Today my friend you will have the information to blink the blue of the RBG, GPIO 10. 


  "SchemaVersion": 1,
  "Name" : "AzureSphereBlink1",
  "ComponentId" : "dafede3f-b746-46ce-xxxx-xxxxxxxxxxx"//blocked out my personal info
  "EntryPoint": "/bin/app",
  "CmdArgs": [ ],
  "Capabilities": {
    "AllowedConnections": [ ],
    "Gpio": [ 10 ],
    "Uart": [ ],
    "WifiConfig": false


​#include <stdbool.h>
#include <errno.h>
#include <string.h>
#include <time.h>

#include <applibs/log.h>
#include <applibs/gpio.h>

int main(void)
    //Inspired by GitHub Azure Sphere Samples designed by Bits4Bots LLC  
//This minimal Azure Sphere app repeatedly toggles GPIO 10, which is the blue channel of RGB
    // LED 1 on the MT3620 RDB.
    // Use this app to test that device and SDK installation succeeded that you can build,
    // deploy, and debug an app with Visual Studio, and that you can deploy an app over the air,
    // per the instructions here:
    // It is NOT recommended to use this as a starting point for developing apps; instead use
    // the extensible samples here:
        "\nVisit for extensible samples to use as a "
        "starting point for full applications.\n");

    int fd = GPIO_OpenAsOutput(10, GPIO_OutputMode_PushPull, GPIO_Value_High);
    if (fd < 0) {
            "Error opening GPIO: %s (%d). Check that app_manifest.json includes the GPIO used.\n",
            strerror(errno), errno);
        return -1;

    const struct timespec sleepTime = {1, 0};
    while (true) {
        GPIO_SetValue(fd, GPIO_Value_Low);
        nanosleep(&sleepTime, NULL);
        GPIO_SetValue(fd, GPIO_Value_High);
        nanosleep(&sleepTime, NULL);
I hope you found this tutorial useful. All of the information on this site is licensed under the creative commons. Share and share alike. Please gives us a mention or share our page with a friend. Thanks.
How would you implement the built-in sensors & leds in your design. How do you feel about cryptography? About 5G? 

Saturday, January 29, 2022

Star Proto Solderable Pref Board

Star Proto Solder Board 132 Tie Points (2 pcs) 

⭐At Bits4Bots, LLC we are designing an all new and anything but square, line of proto boards for electronic enthusiast! By offering a new look to general solderable pref boards we hope to inspire the next generation of STEM careers for grades K-12. 

Background: Soldering is the process of using a filler material (solder) to join pieces of metal together. With a brief introduction to electronic circuits a simple design using a LED, resistor, and battery can be joint together. A lesson on how to solder should also be consider. 

Our proto boards provide a canvas for students and hobbyist who are learning to solder. This product can be used with solder, solder flux and a soldering iron. Personal protective equipment should always be used.

Star Shaped Solderable Perf Board 132 tie points. Double-sided PCB board prototype for electronic circuits. Applicable to various DIP and electronic components.

What is it?

Star shaped perf solder board. 5 mounting holes. 132 tie points for a wide range of DIP and electronic components.

Why did you make it?

Provide a fun shaped solder board to the electronics world (both fun loving electronic enthusiast and kids) and to interest the next generation of STEM careers.

What color is it?


Fun Facts: We use KiCad for our board designs. Autodesk Inventor software is used for 3D models. Boards are designed by a three person team. The Project Lead is an Electrical Engineer. The Tech Leads are visionaries and fun loving content creators.

Free enclosures are in progress to protect the fun shaped proto circuit. Visit us on Thingiverse.

Have comments or questions? Feel free to email us at

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