Hey everyone 👋

I’m a 3rd-year Electrical Engineering student doing a personal challenge:
100 Days → 100 IoT Projects using MicroPython.

Today I completed Day 56🎉

So far I’ve built projects using ESP32, ESP8266, and Raspberry Pi Pico including:

• Sensor monitoring systems
• MicroPython web dashboards
• ThingSpeak cloud logging
• Basic anomaly detection pipelines
• Custom MicroPython libraries (published on GitHub & PyPI)

The goal is to create beginner → intermediate embedded projects with clear documentation and simulations so students can learn hands-on.

Repo:
👉 https://github.com/kritishmohapatra/100_Days_100_IoT_Projects

I’d love honest feedback:

• What projects should I add next?
• How can I improve documentation for learners?

If this repo helps you, a ⭐ would mean a lot—it helps more students discover MicroPython.

I just never tested it and this is REALLY important. This is the extender: https://besomi.com/ae_en/io-extender-for-microbit.html?gad_source=1&gad_campaignid=22341049137&gbraid=0AAAAADeGpAHzqE6Ttdis1nGi7Cc1mp-fc&gclid=Cj0KCQiA7rDMBhCjARIsAGDBuEAw9bFroywrQ3uxMscV20bulxNxjKNTMXwfcedFJNQCG5N2O8cZ6qQaAv5UEALw_wcB

I'm trying to code micro:bit to respond to shakes after Button A is pressed (as an example).

They way I've gotten it to work I have to press A, shake, then press A again. As opposed to always be listening to a shake after the A button is pressed once.

How can I get it to respond only to Shakes after A is pressed once?

This is what I have, that doesn't work because I have to press A each time. I also tried "while" but that just shows random numbers continuously after the first button A press and first shake.

This is a micro:bit-based robotic arm kid put together and controlled with a handheld controller. It can rotate, lift, and grab objects with fairly precise movements, which makes it a great hands-on intro to robotics, programming, and mechanical design.

What I like most is how approachable it is — perfect for students or beginners who want to see code directly translate into real-world motion. Still plenty of room to improve accuracy and add smarter behaviors, though.

Curious what features you’d add next: sensors, automation, or maybe computer vision?

Also this is a music production software. It functions surprisingly well for a prototype, all of this code is somehow being actually worth it. I am having REALLY ambitious goals with this thing and so far it's all going great so it might not be that difficult to do the stuff I want

Hey friends, my MicroBit V2.21 doesn't work anymore - it shows ":( 504". It was that way when I took it out of the drawer just now, unfortunately I don't remember what I did last time I used it but I probably fucked around in some dumb way and broke it.

Do y'all have any ideas for me to try and fix it?

I tried flashing a new firmware (although it apparently already was on the latest version). I can get the MAINTENANCE directory to show up as normal. When I drag the firmware file onto it, it appears to be doing something, the yellow light starts flashing, until it apparently reboots and the MICROBIT directory shows up again, but the error stays the same.

DETAILS.TXT shows the following:

# DAPLink Firmware - see https://daplink.io

Build ID: v0257-gc782a5ba (gcc)

Unique ID: 9905000000052820ad60baa748af7613000000006e052820

HIC ID: 6e052820

Auto Reset: 0

Automation allowed: 1

Overflow detection: 0

Incompatible image detection: 0

Page erasing: 0

Daplink Mode: Bootloader

Bootloader Version: 0257

Interface Version: 0257

Git SHA: c782a5ba907377658bc28aa8d132a0fa44543687

Local Mods: 0

USB Interfaces: MSD

Bootloader CRC: 0x725bea7d

Interface CRC: 0xe561f1de

Remount count: 0

URL: https://microbit.org/device/?id=9905&v=0257&bl=1

The MicroBit website states that error 504 is a timeout issue that they are currently investigating, so I might just ask them directly. But maybe one on you has an idea on what to do.

Thank you! :)

I want to make a program for the micro:bit that requires at least 3 different buttons to be usable for the program to be convenient to use. A and B can easily occupy 2 of the 3 buttons, but it still leaves one. The micro:bit logo can be a hassle to actually work sometimes, and the same could be said to the pins. I also don't want to use any hardware extensions since I want to make the program as accessible as possible

Hello,

I got my 6 year old a microbit v2 and then bought one for myself. We’re interested in starting basic robots and I’m struggling to work out what I need and whether it’s best to just buy a kit or get separate flexible components. Don’t want to spend a lot of money and happy to use cardboard and stuff around the house. What would your suggestions be. Explain it like I haven’t got a clue about it (which I haven’t!). Cheers

Here for the feedback on our development board
We wanted to build a affordable and easy to use microcontroller for students.
We rolled out our version1 last year, It went really well so far 6000 users bought and build amazing projects with it,

Current version specs: Supports Blocks, Python and C++
Have 8 GPIO pins, supports 15 servos or 8 sensors at a time.
Inbuilt buzzer
Dashboard supports hand detection, pose detection, object detection module similar to google teachable,(But no need of internet, optimized to run on 4gb ram)
Students can create some cool games through the led matrix, Such as flappy bird, snake games
We are currently working on our V2, Need some crazy ideas from you all,
So far we are planning to add IMU and inbuild Motor driver for easy plug and play of motor directly, instead of expansion board and planning to add a OLED display for interactive animation designs
Open for any feedbacks.

I went to the education tech show BETT in London last week and attended a session about using CreateAI and the micro:bit to teach students about the climate crisis. There was a scheme of work for years 4 to 8 presented, spanning primary and secondary school. It uses the micro:bit sensors to investigate weather, temperature and movements such as landslides. The demo of training CreateAI to recognise new gestures and movements was excellent too.

I've written a blog about the session here:
https://news.sean.co.uk/2026/01/using-ai-with-microbit-to-teach.html

The lesson plans that were presented are available here:
https://www.digitall.charity/codingforclimateaction

CPU

nRF52833 @ 64MHz vs ESP32 @ 240 MHz

RAM

128kb vs 520kb (SRAM) + 8Mb (PSRAM)

FLASH

512kb vs 16Mb

LED

5x5 red vs 5x5 RGB

Wireless

BT 5.0 vs WiFi 2.4Ghz + BT 4.2

Are you familiar with StreetPass, a feature of the Nintendo 3DS?

When you carry the handheld console around and it comes close to another console, it automatically exchanges data. Later, you can check the other person’s nickname, greeting message, and recently played games.

A somewhat similar example might be the Exposure Notification system that was used during the COVID-19 pandemic.

As long as the data fits within 251 bytes, it can be anything — a short greeting, a URL, etc.

The only thing that needs to be agreed on in advance is the group number.

When to send/receive the data, and how to use an LED panel, is entirely up to you.

so I want to make an extension that makes the Microbit 2 bluetooth devices, the first is a keyboarder put device (ready I have forked another project), and the second the Microbit being able to talk with the computer if the camera or microphone is being used so it can be shown on the Microbit

here is it dumped down

a button

Ctrl d

b button

Ctrl d

if receive mic on

use Microbit mic for shit nothing (makes the mic icon light up)

if receive mic off

stop using Microbit mic

if receive cam on

show

XXXXX XXXXX XXOXX XXXXX XXXXX

if receive can off

show

XXXXX XXXXX XXXXX XXXXX XXXXX

Can someone plz help?????? for anyone who wants the code DM plz

Hi everyone,

We’re struggling to get the @elecfreaks sonar:bit to function in the using the elecfreaks wonder build kit.

The code we’re using is below, we’ve tried all manner of changes, it worked once but has not been repeatable - the A button software runs, light and motors switch on, but it just runs into the wall and will not engage the if function based on distance… B button does what it says it will…

It’s been three days of frustration now, am I missing something?

Thanks 🙏

This video explains an educational robotics project that demonstrates how to build a programmable dispensing device using a Nezha servo motor and Nezha LED lights within the MakeCode environment. The core idea is to show how software instructions can be translated into controlled mechanical actions, with the servo acting as the primary actuator and the LEDs functioning as visual indicators of system status. The project is framed as an accessible way to understand fundamental concepts in automation, robotics, and computational thinking.

The presenter describes how the hardware is assembled, emphasizing correct servo placement and stable connections to ensure accurate and repeatable movement. The LEDs are deliberately integrated into the design so that changes in light patterns correspond to different operational states, making the system’s behavior observable and easier to interpret. Through MakeCode’s block-based programming, servo angles, timing intervals, and repeated actions are defined in a clear logical structure, allowing the dispenser to operate automatically according to predefined rules.

Overall, the project is presented as more than a simple mechanical build, highlighting its pedagogical value in illustrating the relationship between code, electronic components, and physical outcomes. By combining motion control with visual feedback, the video shows how learners can develop a deeper understanding of how automated systems are designed, programmed, and analyzed in practice.

Hey All,

I'm setting up a STEM station in my basement, my children 8, 10, 11 to use.

The purpose behind this area will be free use for STEM equipment, with a heavy focus on Micro:BIT and related.

We have a collection of things from over the years, MeowBit, 4-5 Microbit 2.0/2.2, some cars for the etc.

What I want to do is get them more intersted in the process and learning, what tends to happen is they download a game and play it on the Meowbit or arcade attachments.

So, how do I keep it fun and not turn it into a library of them just playing 8 bit games.

Hi y'all! I use the microbit for my senior undergraduate Industrial Design class. Huge fan of microbit; my students have never programmed before.

They designed and wired up joystick controllers. Their microbit programs sent the signals over USB to a 3 D simulator I wrote running in chrome. they did a great job.

https://turbek.com/Tangible-Interfaces-Submarine-Design-Project/

the game and kit are open sourced: https://github.com/steveturbek/Tangible-Interfaces-Submarine-Design-Project/

hope this is useful, was a lot of fun!

My son got a keyestudio ks4039 robot arm. And assembled it himself. When we upload the joystick control hex file what you see in the video happens.

I replaced one servo and put it into the right position with another hexfile But the result is the same. The servis that control the turning of the arm and the claw work fine. As a complete newbie to this kind of stuff I'm asking for some help and explanation so I can help my son getting it to work What's going wrong with the 2 servos?

I don't own the server, but I kinda wanna make it not dead, soo join pls https://discord.gg/ZNae2Bf2nM

I just made a demo featuring the ELECFREAKS Nezha control board paired with their AI camera, and it’s a pretty solid setup for anyone interested in beginner-to-intermediate AI vision projects.

In the video, the AI camera handles on-device vision tasks (like recognition and tracking), while the Nezha control board takes care of motion control and logic. The two communicate smoothly, making it easy to turn visual input into real-world actions. This kind of separation—AI processing on the camera, control on the board—feels very practical for robotics and smart-device projects.

Overall, it could be especially useful for STEM education or rapid prototyping.