Supported boards and limits

The Device SDK includes adapters for two Arduino boards and is tested with the core and library versions below. Other boards need a board adapter.

Boards

Board	Arduino core	FQBN for Arduino CLI
Arduino UNO R4 WiFi	Arduino UNO R4 Boards 1.5.3	`arduino:renesas_uno:unor4wifi`
Arduino GIGA R1 WiFi	Arduino Mbed OS Giga Boards 4.6.0, main M7 processor	`arduino:mbed_giga:giga`

Controllers join 2.4 GHz Wi-Fi. A GIGA needs its external Wi-Fi antenna.

ArduinoJson 7 (tested with 7.4.3).
ArduinoMqttClient 0.1.8 or later (tested with 0.1.8).
Room Connector on the Room Station, kept up to date. Puzzle completion with prop.completion() needs Room Connector 0.7.2 or later.

Limit	Value
Props per Room	8
Signals, commands, state fields per prop	8, 8, 16
Signals, commands and state fields in total	48 by default; more with `ed::BasicRoom`
ID length	40 characters: lowercase letters, digits and hyphens, starting with a letter
Name length	1 to 80 characters

See Capacity and memory to raise the totals.

Not a safety controller. Keep emergency exits, safety interlocks and other life-safety functions independent of the SDK.
Pairing data isn’t encrypted. After pairing, the board stores the Wi-Fi name and password and its Room Station credentials. Anyone with physical or USB access can read them, so keep controllers in locked or staff-only areas.
Before you reuse, sell or throw away a board, erase its storage with a sketch that clears it. Pairing again isn’t enough: the board keeps the previous record as a backup.
If a paired board leaves your control, pair a replacement controller for that Device. This revokes the old board’s access. Treat the saved Wi-Fi password as exposed and change it.
Your wiring and code are yours. Power loads through suitable drivers and relays, and check each board’s pin voltage limits.