Hardware overview
Every fact here comes from the hardware and protocol reference pages, which were measured on a Wave or read from the stock firmware. Each row links to its page.
| Part | What it is | Reference |
|---|---|---|
| SoC | Amlogic A113X2 (AV400 audio platform). | Compute hardware |
| CPU | 4 × Arm Cortex-A55, up to 2.016 GHz, NEON with asimddp and asimdhp. All of waved’s audio processing runs here. |
Compute hardware |
| NPU | Vivante VIP neural accelerator (galcore driver). Stock runs its speech models on it. The project’s own native backend now runs a complete trained model on it, NVIDIA’s MarbleNet voice-activity detector, 10.4× faster than one CPU core. waved doesn’t use the NPU yet. |
Compute hardware, MarbleNet on the NPU |
| Audio DSP | A HiFi-class DSP at /dev/audiodsp0 with an 8 MB firmware region. Its toolchain is vendor-locked; waved doesn’t use it. |
Compute hardware |
| RAM | 3,834 MB, plus 800 MB of compressed swap (zram). |
Device dump |
| Storage | 30 GB eMMC. Two slots each for the kernel and the read-only system (A/B); /data (512 MB, waved and the overlay); /model (4.6 GB, stock’s AI models); /mnt/udisk (21.5 GB exFAT, recordings). |
Device dump |
| Microphones | 8 MEMS mics in two rings of four, all on the diagonals (45°, 135°, 225°, 315°). Ring radius 25.5 mm, rings 78.2 mm apart. Read as one ALSA device, hw:0,2: 8 channels, 48 kHz, 32-bit samples that carry about 24 bits. |
Audio hardware |
| Speaker | Driven by an acm8625s amplifier on the TDM-B link, ALSA hw:0,1. |
Audio hardware |
| Display | Round LCD, driver fb_ili79400. 400×304 framebuffer at 16 bits (RGB565), of which a circle of radius about 198 around (200, 106) shows, cut flat at the top. Mounted upside down. PWM backlight, 0 to 255. |
Display |
| Touch | The touch half of the same ilitek,ili79400 controller (ILITEK_TDDI), on /dev/input/event1. Reports screen pixels and is mounted upside down like the display. |
Display |
| Bluetooth | A Telink module that runs its own Bluetooth stack (A2DP sink, HFP hands-free, AVRCP, PBAP, SPP, LE) and a 2.4 GHz link to Insta360’s USB dongle. The SoC drives it over /dev/ttyS1 at 921600 baud with a small vendor protocol, not HCI. Its audio runs over the TDM-A link, ALSA hw:0,0: 48 kHz, 2 channels, 16-bit. |
Bluetooth protocol |
| MCU | A separate microcontroller on /dev/ttyS4 at 115200 baud, speaking a private MAVLink v2 dialect. It handles the battery, charging, the lift motor, the LED, the power key and power off. |
MCU protocol |
| Battery | Read through the MCU: level, voltage, temperature and current arrive in its heartbeat, about every 2 seconds. | MCU protocol |
| Power key | Not a Linux input: the MCU reports presses. Holding the key 2 seconds or more powers the Wave off in the MCU itself. | MCU protocol |
| Lift | A motor raises the microphone column: 30, 40 or 50 mm, or 0 mm retracted. The MCU drives it and keeps the height to rise to at power-on. | MCU protocol |
| Wi-Fi | ATBM6031 (ATBM613x family) on SDIO, 2.4 and 5 GHz, interface wlan0. The driver is atbm613x_wifi_sdio.ko; its log lines are tagged atbm_log. One radio: the Wave is either a Wi-Fi client or an access point, never both. |
Wi-Fi |
| USB audio | The USB gadget’s UAC2 function: a stereo, 16-bit, 48 kHz sound card in both directions (card 1 on the Wave). |
Audio hardware |
| USB HID | One HID interface (/dev/hidg0) with Consumer keys (volume, mute), Telephony reports (call state from the computer) and vendor report 0x03, which the Wave Controller app uses. |
Audio hardware |
The serial ports
Section titled “The serial ports”Three UARTs, easy to mix up:
| Port | Speed | Peer |
|---|---|---|
/dev/ttyS1 |
921600 | Bluetooth module |
/dev/ttyS4 |
115200 | MCU |
/dev/ttyS3 |
115200 | Stock calls its peer the camera module (“PUC”); waved doesn’t use it |
Until 2026-10-12 waved talked to /dev/ttyS1 as if it were the MCU, at the
wrong speed. Older notes that describe MCU traffic on /dev/ttyS1 come from
that time. MCU protocol
has the story.
The ALSA devices
Section titled “The ALSA devices”Card 0 has four devices, one per audio link in the device tree:
| Device | Link | Carries |
|---|---|---|
hw:0,0 |
TDM-A | Bluetooth audio, both directions |
hw:0,1 |
TDM-B | The speaker |
hw:0,2 |
PDM | The eight microphones |
hw:0,3 |
Loopback | Unused in waved’s default audio configuration |
Card 1 is the USB audio function. Bluetooth protocol and Audio hardware have the details.