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Top 20 C++ arduino-uno Projects
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OpenMQTTGateway
MQTT gateway for ESP8266 or ESP32 with bidirectional 433mhz/315mhz/868mhz, Infrared communications, BLE, Bluetooth, beacons detection, mi flora, mi jia, LYWSD02, LYWSD03MMC, Mi Scale, TPMS, BBQ thermometer compatibility & LoRa.
Download board-specific files: There are no specific files for the ESP32-CAM board, but the generic esp32dev-ble is suitable. Another two files are needed again. To use the most recent version, browse to the GitHub repository of the OpenMQTT Gateway project, and head over to the releases page. Open the latest release, and take a look at the "Asset" section. Here, you will find the required files for your board. In my case, for OpenMQTT Gateway v1.6, these are: esp32dev-ble-firmware.bin esp32dev-ble-partitions.bin
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Stream
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Arduino-FastLED-Music-Visualizer
An Arduino based music visualizer using the FastLED library and a strip of individually addressable LEDs
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Syslog
An Arduino library for logging to Syslog server in IETF format (RFC 5424) and BSD format (RFC 3164) (by arcao)
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InfluxDB
InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
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LibreCO2
Simple CO2 meter using Arduino UNO-Mega board and popular CO2 sensors (SenseAir S8, Sensirion SCD30, Winsen MH-Z14 or 19 and Cubic CM1106). Operation modes: Normal, Calibration 400ppm, Alarm adjust and Altitud compensation adjust
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NeuroskyHacking
Cooperative multitasking Arduino code example to process/graph EEG data from Star Wars Force Trainer (Neurosky board)
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arduino-uno-aws-irrigation-system
An extremely popular DIY project that allows you to automatically water your plants according to the level of moisture in the soil
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MicroChess
A full featured chess engine designed to fit in an embedded environment, using less than 2K of RAM!
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ggreg20-v3-arduino-uno-wokwi-simulator
GGreg20_V3 Ionizing Radiation Detector for Arduino UNO WOKWI simulator
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Contactless-with-EMG
Going Contactless with Electromyography sensor as part of Biomedical Instrumentation project.
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Jebs-LCS-for-KSP
An automated countdown timer, a macro keyboard, and a control device for Kerbal Space Program that can be connected to the PC and autonomously launch the vehicle when the timer hits 0.
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NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).
C++ arduino-uno discussion
C++ arduino-uno related posts
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Show HN: Going Contactless with EMG Sensor and Arduino
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Is using C++ singleton classes on atmega 2560 to abstract away port, pin and interrupt setup a good approach?
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Show HN: Electroversity – Where world builds Circuits
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Simple question on register programming
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Question about I2C
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ELectroverse 💡 Community for open source electronics enthusiasts.
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Arduino Controlled Spotify Project.
- A note from our sponsor - SaaSHub www.saashub.com | 23 Dec 2025
Index
What are some of the best open-source arduino-uno projects in C++? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | OpenMQTTGateway | 3,918 |
| 2 | mpu6050 | 418 |
| 3 | Arduino-AppleMIDI-Library | 323 |
| 4 | Arduino-FastLED-Music-Visualizer | 199 |
| 5 | EV_Charger | 160 |
| 6 | Syslog | 121 |
| 7 | hwlib | 58 |
| 8 | LibreCO2 | 50 |
| 9 | NeuroskyHacking | 38 |
| 10 | Electroverse | 29 |
| 11 | Spotuino | 27 |
| 12 | arduino-uno-aws-irrigation-system | 26 |
| 13 | MicroChess | 24 |
| 14 | nanoprom | 21 |
| 15 | SIM800L | 17 |
| 16 | ggreg20-v3-arduino-uno-wokwi-simulator | 5 |
| 17 | SmartHome | 4 |
| 18 | Contactless-with-EMG | 3 |
| 19 | CCIR476 | 3 |
| 20 | Jebs-LCS-for-KSP | 0 |
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