C Firmware

Open-source C projects categorized as Firmware

Top 23 C Firmware Projects

  1. Tasmota

    Alternative firmware for ESP8266 and ESP32 based devices with easy configuration using webUI, OTA updates, automation using timers or rules, expandability and entirely local control over MQTT, HTTP, Serial or KNX. Full documentation at

    Project mention: Xiaomi has provided official support for Home Assistant | news.ycombinator.com | 2024-12-16
  2. 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.

    InfluxDB logo
  3. unleashed-firmware

    Flipper Zero Unleashed Firmware

    Project mention: Unleashed Firmware for Flipper Zero: Unlock Hidden Features and Capabilities | news.ycombinator.com | 2024-08-14
  4. flipperzero-firmware

    Flipper Zero firmware source code

    Project mention: Busy Status Bar from Flipper Devices | news.ycombinator.com | 2024-10-14

    It is (but in russian)

    Pavel Zhovner (a lead of flipper devices) wrote about Busy status bar 3 months ago in his Telegram channel (https://t.me/zhovner_hub/2073).

    At https://flipperzero.one/ you can find habr.com blog link. The first post in Flipper blog was made by Zhovner https://habr.com/ru/users/zhovner/ (who has a link to telegram channel zhovner_hub).

  5. nodemcu-firmware

    Lua based interactive firmware for ESP8266, ESP8285 and ESP32

  6. IronOS

    Open Source Soldering Iron firmware

    Project mention: Show HN: iFixit created a new USB-C, repairable soldering system | news.ycombinator.com | 2024-09-12

    TS100 here! Take a look at the OSS firmware

    https://github.com/Ralim/IronOS

    It's a very nice, incremental improvement making the occasional hobbyist soldering a joy.

  7. asuswrt-merlin.ng

    Third party firmware for Asus routers (newer codebase)

  8. edk2

    EDK II

    Project mention: Defragging my old Dell's UEFI NVRAM | news.ycombinator.com | 2025-02-23

    Very interesting. I wonder if this a result of some "swiss cheesee" effect due to constraints around UEFI and NVRAM themselves, when updating EFI variables.

    NVRAM must maintain atomicity of memory transactions for power failures. Its whole purpose is to store data when you turn your computer off. As a result, when deleteing an EFI variable, you can't manage the individual bytes - you have to delete a whole entry (which can be rather large - based on the EFI specification and the code used for edk2, e.g. https://github.com/tianocore/edk2/blob/83a86f465ccb1a792f5c5...). Deleting these entries might become a problem when you start running against memory constraints and what slots in memory are actually available; hence a possible fragmentation issue.

    Additionally, I appreciated how short and specific this blog post was. I enjoy the style of post of someone encountering a problem and solving it.

  9. SaaSHub

    SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

    SaaSHub logo
  10. fwupd

    A system daemon to allow session software to update firmware

    Project mention: Fwupd 2.0.2 Allows Updating Firmware on Many More Devices | news.ycombinator.com | 2024-11-25
  11. esp-homekit-devices

    Advanced firmware to add native Apple HomeKit and custom configurations, compatible with any SoC based on ESP32, ESP32-S, ESP32-C and ESP8266 series. (Shelly, Sonoff, Electrodragon, Tuya...)

  12. nexmon

    The C-based Firmware Patching Framework for Broadcom/Cypress WiFi Chips that enables Monitor Mode, Frame Injection and much more

  13. mongoose-os

    Mongoose OS - an IoT Firmware Development Framework. Supported microcontrollers: ESP32, ESP8266, CC3220, CC3200, STM32F4, STM32L4, STM32F7. Amazon AWS IoT, Microsoft Azure, Google IoT Core integrated. Code in C or JavaScript.

  14. coreboot

    Read-only mirror of https://review.coreboot.org/coreboot.git. Synced every hour. We don't handle Pull Requests.

    Project mention: Authenticated Boot and Disk Encryption on Linux | news.ycombinator.com | 2024-09-03

    > Show me a FLOSS implementation of this standard and you will have a point

    I've had a point from my first comment and it hasn't changed in validity. It's just taking time to convince you, but I think I'm making progress :)

    I referenced several open implementations in my last reply, an a cursory search reveals more [1] [2]. Besides, this still doesn't help you trust the hardware, even if that hardware is entirely open like some sort of RISC chip. Can you verify every step in the supply chain? At every stage of assembly? No? Or, assuming a trusted device, can you be 100% confident something wasn't added, a simple keylogger? Most keyboards can be removed from laptops without leaving a trace, so can screen casings, speakers, batteries, etc. Plenty of places to hide something tiny.

    > At the moment, I would have to trust a megacorporation obeying NSA,

    That's less likely than the software you use having been compromised, for example by introducing an obfuscated bug, or MitMing as you perform a software update (many software update mechanisms have notoriously weak security, search some defcon talks on the subject).

    > Your threat model may vary.

    No, what I'm saying applies to all threat models, and I challenge you to name one to disprove that.

    Secure boot is an open standard and can be implemented in a trustworthy and secure way, you just need to put in the work to do so. It's entirely possible to do so.

    Of course if you are putting in all that work, if you are that at risk, you would need to switch your software stack entirely as well and use something like seL4 as a starting point.

    [1] https://github.com/prplfoundation/prpl-secure-boot

    [2] https://www.coreboot.org/

  15. dji-firmware-tools

    Tools for handling firmwares of DJI products, with focus on quadcopters.

  16. asuswrt-merlin.ng

    Extends the support of Merlin firmware to more ASUS routers (by gnuton)

  17. firmware

    Alternative IP Camera firmware from an open community (by OpenIPC)

    Project mention: Reverse-Engineering an IP Camera | news.ycombinator.com | 2024-07-17
  18. trezor-firmware

    :lock: Trezor Firmware Monorepo

    Project mention: Printer company served you malware for months, called them false positives | news.ycombinator.com | 2025-05-19

    That kind of confirmation does exist, it’s called using a hardware wallet, such as those made by Trezor and others.

    https://trezor.io/

  19. idevicerestore

    Restore/upgrade firmware of iOS devices

  20. Prusa-Firmware-Buddy

    Firmware for the Original Prusa MINI, Original Prusa MK4, Original Prusa XL and Prusa CORE One 3D printers by Prusa Research.

    Project mention: Design for 3D-Printing | news.ycombinator.com | 2025-05-04

    Prusa has fallen very much behind. There are open issues about the Mini and the MK4 that have been open for years and still ignored by Prusa. Table stakes like full compatibility with octoprint.

    For instance: https://github.com/prusa3d/Prusa-Firmware-Buddy/issues/189 (over 5 years old)

  21. NanoVNA

    Very Tiny Palmtop Vector Network Analyzer

  22. ARK-4

    Next Generation Custom Firmware for the PSP and Vita's ePSP.

    Project mention: Year old PSP can now connect to WPA2 WiFi Networks | news.ycombinator.com | 2025-02-14

    Is there any kind of technical write up of how this was accomplished? Looking at the Git history of the branch that introduced the plugin[1] was a bit rough, but I did find an interesting commit[2]. That commit looks like it patches some other code (apparently some pspnet_apctl.prx module)[3] but maybe all the discussion was in Discord and it's not been written up elsewhere?

    It's probably unreasonable to ask for such details without delving into how PSP software images are structured and learning that ecosystem. Also maybe it's obvious for someone with a more low level understanding of the WPA 1 vs. 2 differences. But here I am unreasonably curious. :)

    [1] https://github.com/PSP-Archive/ARK-4/commits/rev160/

  23. Picofly

    Information and firmware related to the rp2040-zero based chip for the nx

  24. stm32-bootloader

    Customizable Bootloader for STM32 microcontrollers. This example demonstrates how to perform in-application-programming of a firmware located on an external SD card with FAT32 file system.

  25. SaaSHub

    SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

    SaaSHub logo
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 Firmware discussion

Log in or Post with

C Firmware related posts

Index

What are some of the best open-source Firmware projects in C? This list will help you:

# Project Stars
1 Tasmota 23,355
2 unleashed-firmware 19,478
3 flipperzero-firmware 14,359
4 nodemcu-firmware 7,788
5 IronOS 7,700
6 asuswrt-merlin.ng 5,653
7 edk2 5,182
8 fwupd 3,433
9 esp-homekit-devices 2,878
10 nexmon 2,597
11 mongoose-os 2,576
12 DAPLink 2,515
13 coreboot 2,371
14 dji-firmware-tools 1,783
15 asuswrt-merlin.ng 1,753
16 firmware 1,528
17 trezor-firmware 1,515
18 idevicerestore 1,515
19 Prusa-Firmware-Buddy 1,328
20 NanoVNA 1,166
21 ARK-4 1,144
22 Picofly 1,052
23 stm32-bootloader 945

Sponsored
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.
www.influxdata.com

Did you know that C is
the 6th most popular programming language
based on number of references?