System Functions

dev.hardware.system - wire path h\a - generated from fwMenuSystem.

enable_battery_stream

Stream Battery Info. Enables or disables streaming of battery info to the host.

Wire command: h\a\o

Arg	Wire type
enable	decS32

Returns: none (Ok/Err only)

dev.hardware.system.enable_battery_stream(enable: int) -> Result

ow_status ow_hardware_system_enable_battery_stream(ow_device* dev, int32_t enable);

dev.hardware().system().enable_battery_stream(enable: i32) -> Result<(), OwError>

The C and Rust signatures above are also the WASM guest signatures - the device API surface is identical; only the transport differs (ow_open_wasm(&dev) in C, OneWili::open() in Rust).

dev.hardware.system.enable_battery_stream(enable)   # check dev.ok

read_otp_info

Read OTP Info. Reads bytes from the fused OTP identity blob (bl_otp_info v3). An unprovisioned device reads all zeros. Read in chunks of 256 bytes or less.

Wire command: h\a\b

Arg	Wire type
offset	decS32
length	decS32

Returns: otp_blob (hexbytes)

dev.hardware.system.read_otp_info(offset: int, length: int) -> Result

ow_status ow_hardware_system_read_otp_info(ow_device* dev, int32_t offset, int32_t length, uint8_t* otp_blob, size_t otp_blob_cap, size_t* otp_blob_len);

dev.hardware().system().read_otp_info(offset: i32, length: i32) -> Result<Vec<u8>, OwError>

The C and Rust signatures above are also the WASM guest signatures - the device API surface is identical; only the transport differs (ow_open_wasm(&dev) in C, OneWili::open() in Rust).

dev.hardware.system.read_otp_info(offset, length)   # returns value; check dev.ok

boot_uf2

Boot UF2. Reboots into the SBL bootloader, which chain-loads the named RAM-app UF2 from the SD card /update directory (card root as fallback). No response is sent on success — the device resets.

Wire command: h\a\u

Arg	Wire type
filename	string

Returns: none (Ok/Err only)

dev.hardware.system.boot_uf2(filename: str) -> Result

ow_status ow_hardware_system_boot_uf2(ow_device* dev, const char* filename);

dev.hardware().system().boot_uf2(filename: &str) -> Result<(), OwError>

The C and Rust signatures above are also the WASM guest signatures - the device API surface is identical; only the transport differs (ow_open_wasm(&dev) in C, OneWili::open() in Rust).

dev.hardware.system.boot_uf2(filename)   # check dev.ok

device_state

Device State. Report the device state for host sync: SD card host (none|main|usb), event host-streaming gate (0|1), active-stream mask (hex, bit index = event id). More space-separated fields may be appended later.

Wire command: h\a\g

Returns: sd (string), hoststream (bool), activemask (string)

dev.hardware.system.device_state() -> Result

ow_status ow_hardware_system_device_state(ow_device* dev, char* sd, size_t sd_cap, bool* hoststream, char* activemask, size_t activemask_cap);

dev.hardware().system().device_state() -> Result<(String, bool, String), OwError>

The C and Rust signatures above are also the WASM guest signatures - the device API surface is identical; only the transport differs (ow_open_wasm(&dev) in C, OneWili::open() in Rust).

dev.hardware.system.device_state()   # returns value; check dev.ok

event_host_streaming

Event Host Streaming. Enables or disables streaming of events to the host. When disabled, stream-class events are suppressed at the host output; protocol events still flow. Same gate as control bytes 0x05 (off) and 0x06 (on).

Wire command: h\a\e

Arg	Wire type
enable	decS32

Returns: enabled (bool)

dev.hardware.system.event_host_streaming(enable: int) -> Result

ow_status ow_hardware_system_event_host_streaming(ow_device* dev, int32_t enable, bool* enabled);

dev.hardware().system().event_host_streaming(enable: i32) -> Result<bool, OwError>

The C and Rust signatures above are also the WASM guest signatures - the device API surface is identical; only the transport differs (ow_open_wasm(&dev) in C, OneWili::open() in Rust).

dev.hardware.system.event_host_streaming(enable)   # returns value; check dev.ok

Events

Spontaneous frames this menu emits (not command responses). Text events arrive as [*<id> ...] frames (Python: Transport.events; C: ow_poll_text_event; Rust: poll_event -> Event::Text); binary events use the binary API below. The on-device rthon binding does not receive event streams in v1.

battery (text)

Battery charger status text

Payload field	Wire type
data	string