micropython

Issues somebody may already be working on are listed last. List everything by date

• docs: undocumented callback object returned by Pin.irq

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  docs

  Difficulty 2/5 1-3 hours Newbie friendliness 69/100

  micropython/micropython#19798 · 1 comment · Opened Oct 22, 2026

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• py/parsenum: with MICROPY_LONGINT_IMPL_LONGLONG, int("18446744073709551616") returns 0 instead of raising OverflowError

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  Difficulty 2/5 1-3 hours Newbie friendliness 78/100

  micropython/micropython#19786 · Opened Oct 19, 2026

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• py/obj.h: default mp_float_hash() casts out-of-range floats to mp_int_t (undefined behaviour)

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  Difficulty 3/5 1-2 days Newbie friendliness 59/100

  micropython/micropython#19785 · Opened Oct 19, 2026

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• py/gc: no_sanitize_address on gc_get_ptr() is not applied with clang, so ASan reports every gc_collect()

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  Difficulty 2/5 1-3 hours Newbie friendliness 72/100

  micropython/micropython#19784 · Opened Oct 19, 2026

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• asyncio.wait_for and socket.readexactly race condition on timeout

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  bug

  Difficulty 3/5 1-2 days Newbie friendliness 65/100

  micropython/micropython#19779 · 3 comments · Opened Oct 17, 2026

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• cannot include math.nan in frozen content

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  bug tools

  Difficulty 3/5 1-2 days Newbie friendliness 68/100

  micropython/micropython#19778 · 2 comments · Opened Oct 17, 2026

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• esp32: filesystem extends beyond 16MiB on flash chips the IDF can only access up to 16MiB

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  Difficulty 4/5 3-5 days Newbie friendliness 42/100

  micropython/micropython#19766 · Opened Oct 14, 2026

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• clang "addition of unsigned offset overflows" diagnostics

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  bug

  Difficulty 4/5 1-2 days Newbie friendliness 48/100

  micropython/micropython#19758 · Opened Oct 11, 2026

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• re.sub callback can retain a stack-backed match object

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

  micropython/micropython#19756 · Opened Oct 10, 2026

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• Reentrant integer conversion leaves stale writable buffer pointers

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  Difficulty 4/5 3-5 days Newbie friendliness 18/100

  micropython/micropython#19755 · Opened Oct 10, 2026

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• Reentrant integer conversion can invalidate list index and slice operations

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

  micropython/micropython#19754 · Opened Oct 10, 2026

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• Reentrant equality can invalidate list storage in count and comparison

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

  micropython/micropython#19753 · Opened Oct 10, 2026

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• stm32: a HardFault resets without a trace and MemManage/BusFault/UsageFault hang; add a board hook to record faults

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  enhancement

  Difficulty 4/5 3-5 days Newbie friendliness 48/100

  micropython/micropython#19745 · Opened Oct 3, 2026

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• Add `machine.mem64` support

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  enhancement

  Difficulty 4/5 3-5 days Newbie friendliness 48/100

  micropython/micropython#19719 · 3 comments · Opened Sep 20, 2026

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• asyncio.run(...) hangs and neither returns nor raises after asyncio.new_event_loop() called within

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  bug

  Difficulty 4/5 3-5 days Newbie friendliness 48/100

  micropython/micropython#19718 · 2 comments · Opened Sep 20, 2026

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• Store ROM qstr strings in a blob with 16-bit offsets

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  enhancement

  Difficulty 5/5 Over a week Newbie friendliness 38/100

  micropython/micropython#19715 · 4 comments · 2 reactions · Opened Sep 17, 2026

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• `bin()`, `hex()` and `oct()` ignore `__index__`

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  bug

  Difficulty 4/5 3-5 days Newbie friendliness 72/100

  micropython/micropython#19714 · 3 comments · Opened Sep 17, 2026

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• usb-midi-device crashes esp32-s3 when OUT USB packets sent at line rate

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  Difficulty 4/5 3-5 days Newbie friendliness 65/100

  micropython/micropython-lib#1162 · 1 comment · Opened Sep 16, 2026

• OpenMV Feature: GC Scan Improvments.

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  enhancement

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

  micropython/micropython#19703 · 2 comments · Opened Sep 16, 2026

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• Support some ANSI escape codes in pyexec repl

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  enhancement

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

  micropython/micropython#19702 · Opened Sep 15, 2026

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• XIAO ESP32C5 assertion "result == ETS_OK" failed

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  bug port-esp32

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

  micropython/micropython#19696 · 1 comment · Opened Sep 11, 2026

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• USB-NCM DHCP-Server shared with WiFi-AP DHCP-Server -> local link IP on AP

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  bug

  Difficulty 3/5 1-2 days Newbie friendliness 78/100

  micropython/micropython#19685 · 1 comment · Opened Sep 5, 2026

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• Thread does not handle import correct

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  bug port-rp2

  Difficulty 3/5 1-2 days Newbie friendliness 65/100

  micropython/micropython#19682 · 6 comments · Opened Sep 5, 2026

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• ports/esp32/usb.c: Native USB CDC drops output / hangs with WebSerial (strict dtr && rts check)

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  bug port-esp32

  Difficulty 4/5 3-5 days Newbie friendliness 64/100

  micropython/micropython#19677 · 1 comment · Opened Sep 1, 2026

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• webassembly: standard variant fails 5 of its own port tests, any gc.collect() aborts

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  port-webassembly

  Difficulty 4/5 3-5 days Newbie friendliness 52/100

  micropython/micropython#19670 · 2 comments · Opened Aug 31, 2026

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• Building with cmake and MICROPY_PY_BTREE=1 yields warnings about old-style function definitions

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  bug

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

  micropython/micropython#19643 · 1 comment · Opened Aug 20, 2026

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• Add class USBDevice to i.MXRT family

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  enhancement port-mimxrt

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

  micropython/micropython#19640 · 1 comment · Opened Aug 19, 2026

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• mpremote errors on SAMD51 + ROMFS during rm -r :/

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  bug tools

  Difficulty 3/5 1-2 days Newbie friendliness 65/100

  micropython/micropython#19636 · 3 comments · Opened Aug 18, 2026

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• json.loads accepts several inputs that CPython rejects, and one of them loses data without reporting anything

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  bug extmod

  Difficulty 4/5 3-5 days Newbie friendliness 48/100

  micropython/micropython#19581 · 10 comments · Opened Aug 5, 2026

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• Expose FreeRTOS Software Timers to MicroPython

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  enhancement needs-info

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

  micropython/micropython#19576 · 2 comments · Opened Aug 4, 2026

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• Since v1.28.0, the exec function transforms the \x00 char in \x01 on ESP32

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  bug py-core

  Difficulty 4/5 3-5 days Newbie friendliness 48/100

  micropython/micropython#19529 · 10 comments · Opened Jul 27, 2026

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• OpenMV Feature: Named Peripherals

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  enhancement

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

  micropython/micropython#19519 · 3 comments · Opened Jul 25, 2026

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• More SRAM on STM32N6

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  enhancement port-stm32

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

  micropython/micropython#19515 · 16 comments · Opened Jul 24, 2026

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• RP2350: machine.I2C.writeto() returns OSError(5) for SHT45 on v1.28.0, works on v1.27.x

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  bug port-rp2

  Difficulty 4/5 3-5 days Newbie friendliness 58/100

  micropython/micropython#19514 · 1 comment · Opened Jul 24, 2026

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• labels: Add labels to improve triaging of issues.

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  enhancement

  Difficulty 2/5 1-3 hours Newbie friendliness 64/100

  micropython/micropython#19509 · 12 comments · Opened Jul 23, 2026

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• esp32H2在ble作为主机连接到设备时触发意外重启

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  bug port-esp32

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

  micropython/micropython#19496 · 1 comment · Opened Jul 21, 2026

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• extmod/modrandom: Add a 64-bits native PRNG for 64-bits systems.

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  enhancement extmod

  Difficulty 5/5 Over a week Newbie friendliness 45/100

  micropython/micropython#19487 · 2 comments · Opened Jul 19, 2026

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• RFC: Distribute native modules for easy installation

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  enhancement tools

  Difficulty 4/5 3-5 days Newbie friendliness 48/100

  micropython/micropython#19479 · 31 comments · 2 reactions · Opened Jul 16, 2026

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• esp32: network.LAN() leaks MAC/PHY/netif and GPIO reservations when esp_eth_driver_install fails — Ethernet unrecoverable until reboot

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  bug port-esp32

  Difficulty 4/5 3-5 days Newbie friendliness 55/100

  micropython/micropython#19457 · 1 comment · Opened Jul 10, 2026

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• Support for various Waveshare ESP32-P4-WIFI6- boards

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  board-definition port-esp32

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

  micropython/micropython#19439 · 1 comment · Opened Jul 8, 2026

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• SoftI2C doesn't work if SDA falls slower than SCL

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  bug

  Difficulty 4/5 3-5 days Newbie friendliness 52/100

  micropython/micropython#19438 · 4 comments · Opened Jul 7, 2026

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• py/gc.c: conservative scan misses pointers at 2-mod-4 offsets on packed 16-bit size_t targets (live objects collected)

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  bug py-core

  Difficulty 4/5 3-5 days Newbie friendliness 48/100

  micropython/micropython#19430 · Opened Jul 4, 2026

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• py/parse.c: parse-node chunk data starts 2-mod-4 on packed 16-bit size_t targets, breaking MP_PARSE_NODE_IS_STRUCT

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  Difficulty 3/5 1-2 days Newbie friendliness 64/100

  micropython/micropython#19429 · 6 comments · Opened Jul 4, 2026

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• py/emitbc.c: jump offset subtraction wraps on ports where size_t is narrower than ssize_t (every backward jump = "bytecode overflow")

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  Difficulty 3/5 1-2 days Newbie friendliness 74/100

  micropython/micropython#19428 · Opened Jul 4, 2026

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• RFC: Python package for MicroPython (Windows/MacOS/Linux/Pyodide)

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  enhancement port-unix port-windows rfc

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

  micropython/micropython#19426 · 19 comments · Opened Jul 4, 2026

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• RP2: machine.reset_cause() reports machine.WDT_RESET after running machine.reset(), even if WDT was never used

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  bug port-rp2

  Difficulty 3/5 1-2 days Newbie friendliness 58/100

  micropython/micropython#19409 · Opened Jul 1, 2026

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• ESP32-S3: Bonding still doesn't work

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  bug port-esp32

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

  micropython/micropython#19405 · 6 comments · Opened Jun 30, 2026

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• [question] mip: native mpy modules distribution

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

  micropython/micropython-lib#1129 · Opened Jun 29, 2026

• mpy-cross/mpy-ld/natmod Please add target for aarch64

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  enhancement tools

  Difficulty 4/5 3-5 days Newbie friendliness 48/100

  micropython/micropython#19386 · 10 comments · Opened Jun 26, 2026

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• webassembly `standard` variant broken with modern Emscripten: two bugs in `library.js` and `api.js`

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  bug port-webassembly

  Difficulty 3/5 1-2 days Newbie friendliness 68/100

  micropython/micropython#19380 · 10 comments · Opened Jun 25, 2026

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