---
title: #3: New Wi-Fi router target
slug: one/dev-log/3
docTags: 
createdAt: 2026-06-22T17:06:03.858Z
---

This is our Dev Log where we share how the development of Flipper One is going.
Updates are grouped by sub-projects, with links, screenshots, and videos so you can explore the details.

**In this Dev Log:** a new Wi-Fi router target, heat sink redesign, a new battery pack safety mechanism, switching input between the Flipper One UI and a Linux desktop, and more.

***

## 🐧 Linux (CPU Software)

- Added a new systemd target `router` that creates a Wi-Fi access point. We measured the speed using a phone connected directly to the Flipper One access point with the `iPerf3` app, and the result was an average speed of 570 Mbps. [Issue #85](https://github.com/flipperdevices/flipperone-linux-build-scripts/issues/85).

  ![Flipper One Wi-Fi access point](https://api.archbee.com/api/optimize/3StCFqarJkJQZV-7N79yY/bXhbjqS1x1yAxumjAnSxp_access-point.jpg)
- OS kernel is now based on release 7.1 with patches for USBDP stability introduced by Collabora. See the [RK3576 support status](https://gitlab.collabora.com/hardware-enablement/rockchip-3588/notes-for-rockchip-3576/-/blob/main/mainline-status.md).
- OP-TEE upstream now supports RK3576 thanks to *@gahingwoo*.  [Issue #57](https://github.com/flipperdevices/flipperone-linux-build-scripts/issues/57), [PR #7821](https://github.com/OP-TEE/optee_os/pull/7821).
- U-Boot upstream merged several patches required for Flipper One, including the patch for UFS boot on RK3576 and Ethernet fixes relevant to Flipper One and EVB1. See the [patch set](https://lore.kernel.org/u-boot/20260311-rk3576-ufs-v6-0-c7c353739242@flipper.net/).
- Linux OS images received two dependency updates:
  - Fixed `wpebackend-fdo` to work with the updated Mesa. [PR #81](https://github.com/flipperdevices/flipperone-linux-build-scripts/pull/81).
  - Brought patched `ffmpeg` and `mpv` to have `rkvdec` decoder working with H264 video. [PR #84](https://github.com/flipperdevices/flipperone-linux-build-scripts/pull/84).

:::Paragraph{indent="1"}
You can get pre-built Linux OS images on our [public build server](https://docs.flipper.net/one/cpu-software/build-system#public-build-server).
:::

***

## ⚙️ Mechanics

- The heat sink was redesigned to give space to a new plastic part that covers the Wi-Fi module and the GPIO port, and includes guides for antenna cables.

  ![Heat sink redesigned: smaller aluminum part and a plastic cover for the Wi-Fi module and GPIO port](https://api.archbee.com/api/optimize/3StCFqarJkJQZV-7N79yY/TssPpemAJPXZgoxHE01jX_heat-sink-redesign.jpg)
- Flipper One now uses Phillips-head screws to secure the Back Plate and Antenna Rail instead of hex socket screws. This change makes it easier to access the M.2 slot using commonly available screwdrivers.

  ![Old hexagonal and new Philips screws](https://api.archbee.com/api/optimize/3StCFqarJkJQZV-7N79yY/Ir8k8m2qwHNmqM-o0Ti2Q_old-new-screws.jpg)

***

## 🔌 Hardware

- Now, the battery pack outputs 8.4 V to the battery connector only after connecting to the Main board. The discharge MOSFET gate is connected to the Gauge IC through two pins on the connector and a jumper on the Main board. This improves safety for low-voltage signal pins: I²C (SDA/SCL) and NTC2. The simplified diagrams below show the change.

  ![Battery pack connector](https://api.archbee.com/api/optimize/3StCFqarJkJQZV-7N79yY/IGqXf_iYz9AvouH5h-Tln_battery-pack-connector.jpg)
- We introduced a new battery pack connector design with a screw-locking mechanism that keeps the battery from disconnecting. One of the concepts was nicknamed Sid — can you guess why?

  ![SID connector](https://api.archbee.com/api/optimize/3StCFqarJkJQZV-7N79yY/yisWNQZsuvP_JsUeNvEo1_sid-connector.jpg)

***

## 🕹️ MCU Firmware

Haptic feedback can now be controlled via intercom using the [I2C registers](https://github.com/flipperdevices/flipperone-mcu-firmware/blob/2fa08603447e5596136fd5d31188f8af4fe36696/applications/services/i2c_intercom/i2c_registers_map.h#L113-L125). We continue our work to bring haptic support in Linux.

```c
// Haptic registers
/*
 * 0x0400 + 0: 2 bytes
 * bit 15 - Play effect (1 - play, 0 - stop)
 * bits 14:8 - Effect number (0..123)
 * bits 7:0 - Duration of the effect, ms (0 or 1 - play full effect, 2..255 - play ms)
*/
#define I2C_HAPTIC_PLAY_EFFECT_REG_ADDRESS (0x0400 + 0)
#define I2C_HAPTIC_PLAY_EFFECT_BIT         (15)
#define I2C_HAPTIC_NUM_EFFECT_MASK         (0x7F00)
#define I2C_HAPTIC_NUM_EFFECT_SHIFT        (8)
#define I2C_HAPTIC_DURATION_MASK           (0x00FF)
#define I2C_HAPTIC_DURATION_SHIFT          (0)
```

***

## 🎨 User Interface

You can now switch input between the Flipper One UI and a Linux desktop. [Commit 4cd4d55](https://github.com/flipperdevices/flipperone-testing/commit/4cd4d550d03c9540272434df096ade270854139d).

::embed[]{url="https://youtu.be/XyNNe1FHe_Y"}

***

## 📚 Documentation

- The flipperone-linux-build-scripts repository README updated to match the current build process. Thank you, *@TriplEight*!
  [PR #76](https://github.com/flipperdevices/flipperone-linux-build-scripts/pull/76).
- The Open tasks page generator now sanitizes task descriptions to produce a clean and readable page. Thanks, *@pedrommaiaa*. [PR #364](https://github.com/flipperdevices/flipperone-docs/pull/364).

***

## Where you can help

Read our new [blog post about FlipCTL](https://blog.flipper.net/flipctl-our-gui-framework-for-embedded-linux-systems/) and contribute to its development! We're also hiring a FlipCTL architecture lead.

We have many tasks open to the community! See the full list on the [🚧 Open tasks](https://docs.flipper.net/one/open-tasks) page.

See you in the next Dev Log!