Sonoff NSPanel Pro 120: WiFi/BT [Part 2]

In the previous article, we got the Wi-Fi working and tested. Since the module is a combo Wi-Fi/BT, Bluetooth is part of the same chip. It's time to get Bluetooth up and running. Bluetooth In Linux, BlueZ is the official Bluetooth protocol stack. It allows different Bluetooth

Sonoff NSPanel Pro 120: WiFi/BT [Part 1]

In previous articles, we already identified that the WiFi/BT combo chip used is the RTL8723DS. This chip supports Wi-Fi 2.4GHz (802.11b/g/n) and Bluetooth 2.1/4.2. While it doesn’t offer the best performance available on the market, it is still a solid and

Sonoff NSPanel Pro 120: Touch Panel

In this post, let's get the touchscreen working. But first, let's review the extracted .dts file to see what devices are connected to the i2c1 bus. i2c @ff190000 { compatible = "rockchip,rk3399-i2c"; reg = < 0x00 0xff190000 0x00 0x1000 > ; clocks = < 0x02 0x1e 0x02 0x14f

Sonoff NSPanel Pro 120: Linux Display Subsystem [Part 2]

In the previous article, we found out what the DSS (Display Subsystem) consists of and its terminology. We also have a .dts reference file from the factory firmware, so we are ready to define our peripheral in the DTS and finally make the screen work. Let’s create a new

Sonoff NSPanel Pro 120: Building And Running Linux

So, assuming we’ve already synced the RK3326 Linux SDK and are familiar with how Linux is booted, in this article, let’s compile a new Linux firmware and upload it to the device. The Rockchip Linux SDK provides three rootfs options: Buildroot , Debian , and Yocto . I’ll choose Buildroot

Sonoff NSPanel Pro 120: Linux Display Subsystem [Part 1]

The first thing we would like to get working in our fresh Linux build is, of course, the LCD screen, as it is essential for running any kind of desktop environment. The graphics stack on Linux can be a bit complicated. The following diagram illustrates the full relationship between the

Rockchip RK3326 Linux SDK: Boot Flow Overview

In this article, let's focus on the boot sequence of Rockchip SoCs running Linux and try to understand the terminology, what each component is, and what it is responsible for. So, let's start with the simplified feature image above. BootROM (aka Boot Code) This is the

Sonoff NSPanel Pro 120: Loader and Maskrom mode

MaskROM and Loader mode are special Rockchip modes that allow a user to read/write data to memory using USB. MaskROM is internal firmware that runs on the Rockchip SoC when no bootable device is found or when a special pin is tied to ground. Since MaskROM is built into

FTDI FT232RL: Bit Bang Mode (Linux) [Part 2]

In the previous post, we covered the installation of FTDI drivers on Ubuntu. This section focuses on controlling GPIO using a Python script. FTDI has 8 digital pins used for serial connections (RXD, TXD, RTS, CTS, DTR, DSR, DCD, RI) and 5 CBUS pins. Initially, I thought to use the

FTDI FT232RL: Bit Bang Mode (Linux) [Part 1]

I want to discuss the topic of easily controlling GPIO pins from a computer via a wired interface. This is particularly useful when working with a development board that I need to reset physically or put into DFU (Device Firmware Upgrade) mode. Typically, this process requires pressing the physical Reset

CES 2025: Unitree Demo

Unitree Robotics is now in Las Vegas attending the CES 2025 exhibition. CES is the most famous technology show, and this time the company was gathering a crowd around their booth. Here are demo videos of the robots that Unitree showcased this year. Enjoy!

Unitree Go2: Stand and Crosswalk

The latest Unitree 1.1.3 firmware update is currently only available for CN (Chinese) dogs, but on New Year's Eve there is a will for magic and presents. So, let's not limit ourselves and make the magic happen. Thanks to the user in China i