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Compatibility

Supported

Platform Minimum Status Verification
Python CPython 3.9 Supported CI on 3.9–3.14
Raspberry Pi OS Python 3.9+ Supported Pure Python and Linux bundle; hardware reports invited
ESP32 Arduino Current PlatformIO package Supported alpha esp32dev compile and native protocol tests
VS Code Current + PlatformIO Supported workflow Checked-in PlatformIO configuration
Arduino IDE 2.x Supported workflow Library metadata and examples

“Raspberry Pi support” means any model and operating-system image able to run a supported CPython version and provide the chosen connection. It does not imply that every historical Pi image, radio, or adapter has been physically tested.

The v0.2.0 authorization callback and TLS peer-certificate properties are Python server features. They do not change ONP/1 compatibility and do not imply that the Arduino client performs server-side policy enforcement.

Not claimed

  • ESP8266, RP2040/Pico W, Arduino UNO WiFi, or non-ESP32 Arduino boards.
  • Every historical Raspberry Pi OS image.
  • Direct BLE GATT support. Bluetooth Classic SPP works only on ESP32 targets that provide it; ESP32-C3/S3 do not.
  • Guaranteed operation through NAT, captive portals, firewalls, or without network coverage.
  • Real-time deadlines, independent security audit, or safety certification.

Adding a field report

Open a compatibility issue with:

  • exact device, revision, OS, Python/Arduino core, and toolchain;
  • Wi-Fi/Ethernet/Bluetooth adapter and access point;
  • connection type and TLS mode;
  • example or application commit used;
  • duration, message count, payload sizes, and reconnect/failure count;
  • RSSI/range and p50/p95/p99 latency when applicable.

Verified reports may be promoted into the supported table. A failed test is useful evidence too; do not omit it.