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Top 11 C home-assistant Projects
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willow
Open source, local, and self-hosted Amazon Echo/Google Home competitive Voice Assistant alternative
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OpenBK7231T_App
Open source firmware (Tasmota/Esphome replacement) for BK7231T, BK7231N, BL2028N, T34, XR809, W800/W801, W600/W601, BL602, LN882H, Realtek chips and more
Project mention: More than 135 open hardware devices flashable with your own firmware | news.ycombinator.com | 2026-03-17Looks good, but it'll probably take a while until it's anywhere close to the coverage of existing repositories:
https://templates.blakadder.com/ has almost 3,000 devices flashable onto Tasmota firmware.
For older Tuya devices there's https://github.com/tuya-cloudcutter/tuya-cloudcutter
OpenBeken https://github.com/openshwprojects/OpenBK7231T_App covers 800 of the newer generation Tuya devices.
And there's a large community adapting ESP32 devices onto https://esphome.io/
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glados-voice-assistant
DIY Voice Assistant based on the GLaDOS character from Portal video game series. Works with home assistant!
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bsb_lan
Monitor and control heating systems with a Siemens® controller used by Elco®, Brötje®, Atlantic® and other heating systems with a Boiler-System-Bus (BSB), Local Process Bus (LPB) or Punkt-zu-Punkt Schnittstelle (PPS). Easy integration into your home automation system, such as Home Assistant and others.
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ESPHome-Air-Quality-Monitor
ESPHome configuration for a DIY indoor air quality monitor for CO₂ concentration, PM2.5 and PM10 concentrations, and temperature, humidity and pressure
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bluetooth-temperature-sensors
Read Bluetooth Advertising Packets from BLE temperature sensors and publish data to MQTT
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imud
imud is a general-purpose IMU daemon for Linux — think of it as gpsd for IMUs. It owns the inertial sensor, does the hard real-time work once (interrupt-driven sampling, calibration, sensor fusion, precise hardware timestamps), and publishes a clean attitude/heading/motion estimate on standard interfaces.
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 home-assistant discussion
C home-assistant related posts
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ESPectre Sensor: open-source motion detection system for ESP32
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Show HN: ESPectre – Motion Detection Using Wi-Fi and Math
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Is there *any* speaker group casting system out there that just works?
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How can I monitor my energy usage? I.e. connect to home assistant? I live in a rental apartment and this is the main board.
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ESP32 Buyer’s Guide: Different Chips, Firmware, Sensors
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Power meter, where to put the pulse reader?
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Remotes for light control
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A note from our sponsor - SaaSHub
www.saashub.com | 15 Aug 2026
Index
What are some of the best open-source home-assistant projects in C? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | willow | 3,092 |
| 2 | OpenBK7231T_App | 2,239 |
| 3 | ESPresense | 1,460 |
| 4 | glados-voice-assistant | 343 |
| 5 | bsb_lan | 336 |
| 6 | homeplate | 309 |
| 7 | fanpico | 233 |
| 8 | smart-plant-monitor | 190 |
| 9 | ESPHome-Air-Quality-Monitor | 118 |
| 10 | bluetooth-temperature-sensors | 67 |
| 11 | imud | 11 |
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