arduino/ArduinoCore-API

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Hardware independent layer of the Arduino cores defining the official API

Stars: 306
Forks: 150
Open beginner issues: 0
Indexed issues: 102

Dominant language: C++
License: LGPL-2.1
Last GitHub push: Oct 12, 2025
Latest indexed: Sep 14, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed
PR merge metrics: No merged PRs in 30d

Beginner friendly Everything

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102 open issues indexed

Bit manipulation not working with 64 bit values Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

arduino/ArduinoCore-API#261 · Opened Dec 8, 2025
Missing virtual destructor for `Print` class Open

bug

Difficulty 1/5 Under an hour Newbie friendliness 30/100

arduino/ArduinoCore-API#256 · Opened Sep 14, 2025
In stream.cpp add readln, to simplify reading Windows and Linux text files Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 48/100

arduino/ArduinoCore-API#251 · 1 comment · Opened May 20, 2025
Use modern C++ casts instead of current C-style casting approaches Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

arduino/ArduinoCore-API#250 · Opened Apr 3, 2025
Always true condition in IPAddress string-to-ipv6 conversion Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

arduino/ArduinoCore-API#249 · Opened Apr 1, 2025
integer to binary array conversion Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

arduino/ArduinoCore-API#247 · 1 comment · Opened Feb 24, 2025
API Improvement - Wire Library Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

arduino/ArduinoCore-API#244 · Opened Jan 18, 2025
SPI API add void transfer(const void *tx_buffer, void *rx_buffer, size_t count); Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 45/100

arduino/ArduinoCore-API#243 · Opened Jan 10, 2025
String object, len is of type unsigned int, however indexOf() and lastIndexOf() return int Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 52/100

arduino/ArduinoCore-API#239 · 1 comment · Opened Oct 24, 2024
Feature Request - add "remote" member to the CanMsg class to denote Remote Transfer Request (RTR) frames Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

arduino/ArduinoCore-API#230 · 1 comment · Opened May 1, 2024
IPAddress toString should use existing printTo algorithm and conform to RFC 5952 canonical format for IPv6 addresses Open

enhancement

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

arduino/ArduinoCore-API#228 · Opened Dec 15, 2023
Clean up use of sprintf Open

Difficulty 4/5 3-5 days Newbie friendliness 28/100

arduino/ArduinoCore-API#209 · Opened Sep 8, 2023
Detecting errors in String operations Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

arduino/ArduinoCore-API#186 · 1 comment · Opened Mar 16, 2023
Should SPI `attachInterrupt()` and `detachInterrupt()` be removed? Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 30/100

arduino/ArduinoCore-API#183 · 1 comment · Opened Feb 24, 2023
[Feature Request] timer interrupt callback function Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

arduino/ArduinoCore-API#182 · Opened Feb 10, 2023
Add "streaming" syntax support to Print class Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 45/100

arduino/ArduinoCore-API#180 · 3 comments · Opened Feb 4, 2023
String::toInt() and atol() behave different on different platforms with a number that is too large. Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 48/100

arduino/ArduinoCore-API#175 · Opened Oct 14, 2022
Dubious code in printFloat(double number, uint8_t digits) Open

bug

Difficulty 5/5 Over a week Newbie friendliness 25/100

arduino/ArduinoCore-API#172 · 2 comments · Opened Oct 3, 2022
String move() and String(String &&rval) breaks operation of reserve() Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

arduino/ArduinoCore-API#161 · 4 comments · Opened Apr 30, 2022
Extend String to print 64-bit integers Open

Difficulty 2/5 1-3 hours Newbie friendliness 25/100

arduino/ArduinoCore-API#156 · 1 comment · 1 reaction · Opened Sep 21, 2021
Arduino String class: features missing (feature request) Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

arduino/ArduinoCore-API#152 · Opened Jul 24, 2021
Prevent wakeup on ext int Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

arduino/ArduinoCore-API#145 · Opened Apr 10, 2021
Each core provides a different USBAPI Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

arduino/ArduinoCore-API#141 · 2 comments · 1 reaction · Opened Feb 18, 2021
Feature request : Add parseHex() to serial library Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

arduino/ArduinoCore-API#134 · Opened Dec 17, 2020
Adding digitalToggle to core? Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

arduino/ArduinoCore-API#130 · 6 comments · Opened Dec 5, 2020
Porting guide Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

arduino/ArduinoCore-API#124 · 6 comments · Opened Sep 26, 2020
Please consider refining (reorganizing/documenting) core headers to aid in their explicit inclusion ... Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

arduino/ArduinoCore-API#121 · Opened Sep 18, 2020
Stream::find() not working for values above 0x7F Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

arduino/ArduinoCore-API#119 · 1 comment · Opened Sep 8, 2020
Public API to increase buffer sizes Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

arduino/ArduinoCore-API#115 · 2 reactions · Opened Jun 2, 2020
File base class Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

arduino/ArduinoCore-API#114 · 2 comments · 4 reactions · Opened May 17, 2020
String == String does not work with embedded NUL characters Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

arduino/ArduinoCore-API#112 · 8 comments · Opened Apr 18, 2020
Uninitalised memory when copying String with embedded NUL character Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

arduino/ArduinoCore-API#111 · 2 comments · Opened Apr 11, 2020
add isFlushed() to Stream/HardwareSerial Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

arduino/ArduinoCore-API#110 · 1 reaction · Opened Apr 5, 2020
force new enums for pinMode and pinStatus to 8 bits type instead of default int Open

Difficulty 5/5 Over a week Newbie friendliness 18/100

arduino/ArduinoCore-API#109 · 6 comments · Opened Apr 3, 2020
refactor the use of g_APinDescription ? Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

arduino/ArduinoCore-API#106 · 1 comment · 3 reactions · Opened Dec 11, 2019
[Stream.h] make MultiTarget and findMulti public Open

Difficulty 2/5 1-3 hours Newbie friendliness 38/100

arduino/ArduinoCore-API#105 · 2 comments · 1 reaction · Opened Nov 25, 2019
attachInterrupt implementation remarks Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

arduino/ArduinoCore-API#99 · 1 comment · Opened Sep 23, 2019
Convert existing cores Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

arduino/ArduinoCore-API#95 · Opened Sep 19, 2019
String.h conflicts with <string.h> on case insensitive filesystems Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

arduino/ArduinoCore-API#37 · 18 comments · 7 reactions · Opened Aug 2, 2019
add pin open-drian and push-pull mode Open

Difficulty 2/5 1-3 hours Newbie friendliness 38/100

arduino/ArduinoCore-API#36 · 4 comments · Opened Jul 1, 2019
Add license for all files in the ArduinoCore-API repo Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

arduino/ArduinoCore-API#35 · 3 reactions · Opened Jun 28, 2019
Improved print formatting Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

arduino/ArduinoCore-API#34 · 2 reactions · Opened Jun 16, 2019
Wire.requestFrom with 5 params is undocumented & exists only on AVR & SAM, not SAMD & megaAVR Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

arduino/ArduinoCore-API#92 · 2 comments · 2 reactions · Opened Jun 11, 2019
Should provide DMA library Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

arduino/ArduinoCore-API#93 · 8 comments · Opened Jun 9, 2019
Add & expand analog resolution API Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

arduino/ArduinoCore-API#33 · Opened Jun 9, 2019
Add `Print::printf` Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 25/100

arduino/ArduinoCore-API#32 · 2 comments · Opened Jun 3, 2019
[Feature Request] Make Wire library methods virtual Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

arduino/ArduinoCore-API#31 · 6 comments · 2 reactions · Opened Apr 2, 2019
extension request: preemptive multithreading lib for M0, M3, M4 (like std::thread, ftrias/TeensyThreads, ESP32) Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

arduino/ArduinoCore-API#91 · 7 comments · Opened Mar 29, 2019
Breakage caused by PinStatus and PinMode types Open

bug

Difficulty 5/5 Over a week Newbie friendliness 25/100

arduino/ArduinoCore-API#25 · 69 comments · 2 reactions · Opened Jan 2, 2019
I2S API missing Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

arduino/ArduinoCore-API#24 · 4 comments · Opened Dec 11, 2018

arduino/ArduinoCore-API

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