Lup Yuen LEE

Within Two Weeks: We squashed our GitHub Actions spending from $4,900 (weekly) down to $890. Previously: Our developers waited 2.5 Hours for a Pull Request to be checked. Now we wait at most 1.5 Hours! This article explains everything we did in the (Semi-Chaotic) Two Weeks for Apache NuttX RTOS.

Refurbished Ubuntu PCs have become quite affordable. Let's turn them into a (Low-Cost) Build Farm for Apache NuttX RTOS, thanks to the Docker Image provided by NuttX.

We’re experimenting with an LLM Bot (Large Language Model) that will review Pull Requests for Apache NuttX RTOS. This article explains how we created the Bot in One Week... By sheer accident!

This article explains how Apache NuttX RTOS is running Continuous Integration with GitHub Actions. Every NuttX Pull Request will trigger 1,594 NuttX Builds!

My student Rushabh Gala has just completed his project for Google Summer of Code, on creating Safer Rust Apps for Apache NuttX RTOS. In this article we walk through Rushabh’s contributions, and understand how we’re evolving Rust Apps for NuttX.

Earlier this year we made a RISC-V Emulator for Ox64 BL808 SBC, thanks to our customised TinyEMU RISC-V Emulator. (Not the small flightless bird) Now that NuttX supports Sophgo SG2000 SoC: Let's create a similar emulator for Pine64 Oz64 SBC and Milk-V Duo S!

Last week we upstreamed Milk-V Duo S SBC to Apache NuttX RTOS. (Based on Sophgo SG2000 RISC-V SoC) But NuttX Mainline changes every day. Will Milk-V Duo S suffer “Software Bit Rot”? And fail to boot NuttX someday? Let’s do Daily Automated Testing for NuttX on a Milk-V Duo S SBC, controlled by an IKEA Smart Power Plug with Home Assistant API.

What if we could boot and test Apache NuttX RTOS inside a Web Browser? This presentation explains how we created a NuttX Emulator in WebAssembly, based on TinyEMU RISC-V Emulator.

What if we could boot and test Apache NuttX RTOS inside a Web Browser? This presentation explains how we created a NuttX Emulator in WebAssembly, based on TinyEMU RISC-V Emulator.

We ported Apache NuttX RTOS to PINE64’s Ox64 BL808 64-bit Single-Board Computer. And we created an Emulator for Ox64 SBC that runs in the Web Browser, thanks to TinyEMU RISC-V Emulator. Today we run Daily Automated Testing of NuttX on the Ox64 Emulator. In this presentation we explain how we used the Ox64 Emulator in our experiments with WebAssembly and NuttX: (1) Testing the TCC RISC-V Compiler in WebAssembly (2) Porting the QuickJS JavaScript Engine to NuttX (3) Creating a Drag-n-Drop App Builder for NuttX

We ported Apache NuttX RTOS to PINE64’s Ox64 BL808 64-bit Single-Board Computer. And we created an Emulator for Ox64 SBC that runs in the Web Browser, thanks to TinyEMU RISC-V Emulator. Today we run Daily Automated Testing of NuttX on the Ox64 Emulator. In this presentation we explain how we used the Ox64 Emulator in our experiments with WebAssembly and NuttX: (1) Testing the TCC RISC-V Compiler in WebAssembly (2) Porting the QuickJS JavaScript Engine to NuttX (3) Creating a Drag-n-Drop App Builder for NuttX

Today we can get Real-Time NuttX Logs from our RISC-V Devices: Ox64 SBC (Web Serial API) and Ox64 Emulator (Term.js). What if we could analyse the RISC-V Logs in Real-Time? And show the results in the Web Browser? Let’s do it with PureScript, the Functional Language that compiles to JavaScript. We’ll also support Online Scripting of PureScript for Log Parsing. Can we enhance the NuttX Developer Experience with Functional Programming Tools like PureScript? Or newer hardware like PINE64 Ox64 SBC and Sophgo SG2000 / Milk-V Duo S? Let’s chat about this.

Today we can get Real-Time NuttX Logs from our RISC-V Devices: Ox64 SBC (Web Serial API) and Ox64 Emulator (Term.js). What if we could analyse the RISC-V Logs in Real-Time? And show the results in the Web Browser? Let’s do it with PureScript, the Functional Language that compiles to JavaScript. We’ll also support Online Scripting of PureScript for Log Parsing. Can we enhance the NuttX Developer Experience with Functional Programming Tools like PureScript? Or newer hardware like PINE64 Ox64 SBC and Sophgo SG2000 / Milk-V Duo S? Let’s chat about this.

Soon we'll see many new 64-bit RISC-V SBCs based on the Sophgo SG2000 RISC-V SoC. Will they work with Apache NuttX RTOS? Let's find out!

Will Rust Apps run on a 64-bit RISC-V SBC? Like Ox64 BL808 SBC? Let's find out with Apache NuttX RTOS!

Our Rust App compiles for Software Floating-Point, but Apache NuttX RTOS expects Hardware Floating-Point... Let's fix this with a Rust Custom Target for QEMU RISC-V

Here's how we run Rust Apps on Apache NuttX RTOS and QEMU RISC-V Emulator.

Troubleshooting Crash Dumps for Apache NuttX RTOS will become a little less painful... Thanks to our new NuttX Log Parser! This is how we created with PureScript, a Real-Time Parser and Explainer for RISC-V Exceptions and Stack Dumps.

Remember Makecode? BBC micro:bit and its Drag-n-Drop App Builder? Let's give MakeCode a wholesome wholesale makeover... With Blockly, QuickJS JavaScript Engine, Apache NuttX RTOS and Ox64 BL808 64-bit RISC-V SBC

Can we run QuickJS JavaScript Engine on Apache NuttX RTOS? And Blink the LED on Ox64 BL808 RISC-V SBC... In 4 lines of JavaScript? Let’s do it!

We solve a hefty headache in our port of TCC Compiler to WebAssembly: Missing C Header Files... Thanks to the ROM FS Filesystem and the ROM FS Driver from Apache NuttX RTOS

Today we're running Apache NuttX RTOS inside a Web Browser. What if we could compile and test NuttX Apps in the Web Browser? Let's explore with TCC 64-bit RISC-V Compiler, compiled to WebAssembly with Zig Compiler.

Every day we're auto-building Apache NuttX RTOS for Ox64 BL808 SBC... Can we test NuttX on Ox64 Emulator automatically after building? Let's find out!

Let's create a barebones Ox64 BL808 Emulator that runs in the Web Browser... By tweaking TinyEMU RISC-V Emulator and booting Apache NuttX RTOS without any modification

Here's how we boot and run Apache NuttX RTOS in the Web Browser... Thanks to TinyEMU RISC-V Emulator, VirtIO Virtual Devices and OpenAMP Library

Let's blink an LED on Pine64 Ox64 BL808 64-bit RISC-V Single-Board Computer... With Nim Programming Language and Apache NuttX Real-Time Operating System

Bare Metal Experiments with Apache NuttX RTOS (Real-Time Operating System) on the affordable Pine64 Ox64 BL808 64-bit RISC-V SBC

Weak Ordering in the Ox64 BL808 Memory Management Unit (T-Head C906)... Causes problems with UART Interrupts and the Platform-Level Interrupt Controller

We dive into the Platform-Level Interrupt Controller (PLIC) for the tiny adorable Pine64 Ox64 BL808 64-bit Single-Board Computer... Using Apache NuttX Real-Time Operating System to explain the inner workings of PLIC

(1) What's inside an Application for Apache NuttX RTOS (2) How it calls the NuttX Kernel (3) How NuttX Apps are bundled into the Initial RAM Disk for Pine64 Ox64 BL808 RISC-V SBC

Let's boot Apache NuttX RTOS on Pine64 Ox64 64-bit RISC-V SBC... And figure out how the Sv39 Memory Management Unit works

Let's boot a tiny bit of Apache NuttX Real-Time Operating System... On Pine64 Ox64 BL808 RISC-V SBC

Let's boot Linux on Pine64 Ox64 BL808 RISC-V SBC... As we figure out how Apache NuttX RTOS might run on Ox64

Let's boot Apache NuttX RTOS on the Star64 JH7110 RISC-V SBC (VisionFive5 too)... And experiment with the OpenSBI Supervisor Binary Interface

Here's how we fixed TFTP Timeouts in the Star64 JH7110 U-Boot Bootloader... By sending every TFTP Data Packet twice

Smartphones are incredibly complex gadgets. What if we could learn the internals of smartphones... By booting Apache NuttX RTOS on our phone? Over the past year, we have ported NuttX to PINE64 PinePhone as an Educational Experiment. Today we can run NuttX Touchscreen Apps on PinePhone, based on Allwinner A64 SoC with Arm64 CPUs. NuttX on PinePhone will soon support Phone Calls and Text Messages on the 4G LTE Network. We hope NuttX will become a valuable tool for teaching the inner workings of modern smartphones.

Smartphones are incredibly complex gadgets. What if we could learn the internals of smartphones... By booting Apache NuttX RTOS on our phone? Over the past year, we have ported NuttX to PINE64 PinePhone as an Educational Experiment. Today we can run NuttX Touchscreen Apps on PinePhone, based on Allwinner A64 SoC with Arm64 CPUs. NuttX on PinePhone will soon support Phone Calls and Text Messages on the 4G LTE Network. We hope NuttX will become a valuable tool for teaching the inner workings of modern smartphones.

This presentation explains how we built the NuttX Drivers to support Touchscreen Apps on PINE64 PinePhone: (1) MIPI DSI on Allwinner A64 SoC (2) Allwinner Display Engine (3) Goodix I2C Touch Panel (4) Integration with LVGL Graphics Library. To derisk the development, we prototyped the NuttX Drivers in the Zig Programming Language, before rewriting to C.

This presentation explains how we built the NuttX Drivers to support Touchscreen Apps on PINE64 PinePhone: (1) MIPI DSI on Allwinner A64 SoC (2) Allwinner Display Engine (3) Goodix I2C Touch Panel (4) Integration with LVGL Graphics Library. To derisk the development, we prototyped the NuttX Drivers in the Zig Programming Language, before rewriting to C.

What if we could prototype and test Touchscreen Apps in the Web Browser, before running on a real device? In this presentation we explain how we compiled the LVGL Graphics Library to WebAssembly with Zig Compiler. We created a NuttX App in the Zig Programming Language that runs in the Web Browser, calling the LVGL Library in WebAssembly. We hope that this will someday enable NuttX Apps to be created and tested easily in the Web Browser.

What if we could prototype and test Touchscreen Apps in the Web Browser, before running on a real device? In this presentation we explain how we compiled the LVGL Graphics Library to WebAssembly with Zig Compiler. We created a NuttX App in the Zig Programming Language that runs in the Web Browser, calling the LVGL Library in WebAssembly. We hope that this will someday enable NuttX Apps to be created and tested easily in the Web Browser.

Let's power up the DC8200 Display Controller inside Star64 JH7110 RISC-V Single-Board Computer... By running simple commands in the U-Boot Bootloader

Let's take a walk inside the Display Controller for Pine64's Star64 JH7110 RISC-V SBC... And find out how we'll create the Display Driver for Apache NuttX RTOS

Smartphones are incredibly complex gadgets. What if we could learn the internals of smartphones... By booting Apache NuttX RTOS (Real-Time Operating System) on our phone? Over the past year, we have written a series of 24 articles explaining the inner workings of PINE64 PinePhone, and how we implemented the smartphone features with Apache NuttX RTOS. The articles cover the essential (and esoteric) topics on smartphone technology: MIPI DSI LCD Display, I2C Touch Panel, USB Controller, LTE Modem, Accelerometer / Gyroscope, Arm64 Interrupts and many more. We are also experimenting with newer, easier ways to create Smartphone Apps, with LVGL Graphics Library, Zig Programming Language, WebAssembly Simulation and Arm64 Emulation.

Smartphones are incredibly complex gadgets. What if we could learn the internals of smartphones... By booting Apache NuttX RTOS (Real-Time Operating System) on our phone? Over the past year, we have written a series of 24 articles explaining the inner workings of PINE64 PinePhone, and how we implemented the smartphone features with Apache NuttX RTOS. The articles cover the essential (and esoteric) topics on smartphone technology: MIPI DSI LCD Display, I2C Touch Panel, USB Controller, LTE Modem, Accelerometer / Gyroscope, Arm64 Interrupts and many more. We are also experimenting with newer, easier ways to create Smartphone Apps, with LVGL Graphics Library, Zig Programming Language, WebAssembly Simulation and Arm64 Emulation.

Here's how we boot a Real-Time Operating System (Apache NuttX) on the Star64 JH7110 64-bit RISC-V Single-Board Computer

Pine64's Star64 JH7110 RISC-V SBC is now supported in Apache NuttX RTOS Mainline! Let's review how we created the first release of NuttX for Star64

Apache NuttX RTOS on Pine64's Star64 JH7110 RISC-V SBC has a problem with Serial I/O Interrupts and the RISC-V Platform-Level Interrupt Controller (PLIC)... Let's fix this!

Apache NuttX RTOS crashes on Pine64's Star64 JH7110 RISC-V SBC because there's no Semihosting. But no worries! We modified NuttX to boot with an Initial RAM Disk instead (initrd).

We're porting Apache NuttX RTOS to Pine64's Star64 JH7110 RISC-V SBC... And we see interesting issues with RISC-V Privilege Levels and 16550 UART Registers

Let's boot Apache NuttX RTOS (or Linux) over the Network with U-Boot Bootloader and TFTP... On Pine64's Star64 JH7110 RISC-V Single-Board Computer

(Partially) Booting Apache NuttX Real-Time Operating System on Pine64's Star64 64-bit RISC-V Single-Board Computer, based on StarFive JH7110 SoC

Watch what happens when we boot Yocto and Armbian Linux on Pine64's Star64 64-bit RISC-V Single-Board Computer, based on StarFive JH7110 SoC

Let's look inside the Linux Images for Pine64's Star64 64-bit RISC-V Single-Board Computer: Armbian and Yocto

Let's boot Apache NuttX Real-Time Operating System on a 64-bit RISC-V Device (QEMU Emulator) and explore the Boot Code inside NuttX

2023 has been an awesome year for Apache NuttX RTOS on Pine64 PinePhone! Let's review the features that we've implemented... And what we'll do next

How we created the LVGL Feature Phone UI for Pine64 PinePhone on Apache NuttX RTOS... By tweaking and testing in a Web Browser!

Can we preview an LVGL App in the Web Browser... With WebAssembly and Zig Compiler? Let's find out!

Yep it's a Sourdough Recipe

When we tilt our Smartphone from Portrait to Landscape... How does it know that we're tilting our phone? Watch what happens when we snoop the MPU-6050 Accelerometer Data from PinePhone with Apache NuttX RTOS

Making Phone Calls and Sending SMS Text Messages with PinePhone's Quectel EG25-G 4G LTE Modem... How we'll do it with Apache NuttX RTOS

All about the Quectel EG25-G 4G LTE Modem inside Pine64 PinePhone... And how we'll control it with Apache NuttX RTOS

Porting the Enhanced Host Controller Interface (EHCI) USB Driver... From Apache NuttX RTOS to Pine64 PinePhone

Here's how Apache NuttX RTOS boots on Pine64 PinePhone... Visualised as a Call Graph with Unicorn Emulator and Rust

To make PinePhone testing easier... Can we emulate Arm64 PinePhone with Unicorn Emulator? Let's find out! We'll call the Unicorn Emulator in Rust

What's inside the USB Controller of Pine64 PinePhone... And how we'll create a USB Driver for Apache NuttX RTOS

Let's build a Terminal App for PinePhone... With LVGL and Apache NuttX RTOS

ChatGPT (the AI chatbot) will gladly answer questions about Apache NuttX RTOS! But the answers aren't always correct. Let's turn this into a learning opportunity, and understand why ChatGPT's answers are incorrect

How we configure Apache NuttX RTOS to boot an LVGL Touchscreen App on Pine64 PinePhone

All about the Capacitive Touch Panel inside Pine64 PinePhone... And how we created the PinePhone Touch Panel Driver for Apache NuttX RTOS

Let's talk about Apache NuttX RTOS for Pine64 PinePhone: What is it? Why are we doing this? How will we use it?

How NuttX Apps call the NuttX Framebuffer Interface to render graphics... And what's inside the Framebuffer Driver for Pine64 PinePhone

Apache NuttX RTOS now boots with a Test Pattern on Pine64 PinePhone! Let's find out what's inside our new NuttX Driver for PinePhone's LCD Panel.

Apache NuttX Kernel now supports Allwinner A64 Display Engine on Pine64 PinePhone! Here's how we call it to render graphics on PinePhone's LCD Display

Apache NuttX Kernel has a driver for MIPI Display Serial Interface... Here's how it will be called for rendering PinePhone's LCD Display

Here are the steps to prepare a Pull Request for Apache NuttX RTOS

How we render graphics directly to PinePhone's Display Hardware... With the Zig Programming Language and Apache NuttX RTOS

How does Pine64 PinePhone render graphics on its LCD Display? Let's find out about the Allwinner A64 SoC's Display Engine (DE) and Timing Controller (TCON0).

Let's build a PinePhone Display Driver in Zig... That will run on Apache NuttX RTOS

How does Pine64 PinePhone control its LCD Display over MIPI Display Serial Interface? Let's find out!

Pine64’s PineDio Stack BL604 is a RISC-V board that’s packed with IoT features: Touchscreen, LoRa, WiFi, BLE, GPS and more. In this presentation we’ll talk about the porting of NuttX to PineDio Stack, how we simplified the developer onboarding, and our plans to support LoRaWAN and LVGL Apps in Zig.

What if we could drag-and-drop NuttX Sensors to create IoT Apps? In this presentation we’ll explore Blockly, the web-based toolkit for Visual Programming, and how we might customise Blockly to create NuttX Sensor Apps. We’ll also discuss the Zig Programming Language, and why Blockly will generate NuttX Sensor Apps as Zig programs.

Is there a simpler and safer way to code Touchscreen Apps with the LVGL Graphics Library? In this presentation we’ll talk about migrating a NuttX LVGL App from C to Zig, and the benefits that it brings.

Let's experiment with the GPIO Hardware on Pine64 PinePhone... With a little help from Apache NuttX RTOS

Our PinePhone Operating System will be awfully quiet if we don't implement UART Input and Output... Here's how we implemented the UART Driver for Apache NuttX RTOS

How Pine64 PinePhone handles Arm64 Interrupts with the Generic Interrupt Controller... And how we implemented PinePhone Interrupt Handling in Apache NuttX RTOS

How we ported Apache NuttX RTOS to PinePhone... And what's inside the U-Boot Bootloader

Apache NuttX RTOS now runs on 64-bit Arm Cortex-A53 with Multi-Core Symmetric Multi-Processing... Will it run on PinePhone? Let's find out!

What if we could drag-and-drop NuttX Sensors... To create IoT Sensor Apps in Zig? Let's find out!

How we create a Zig program visually with Blockly, the drag-n-drop way... And how we might use it to build Sensor IoT Apps for Apache NuttX RTOS

Using Zig to read Sensor Data on Apache NuttX RTOS... With Bosch BME280 Temperature / Humidity / Air Pressure Sensor

Can we use Zig to build an LVGL Touchscreen App for Apache NuttX RTOS? Also wrap the LVGL API in Zig to build simpler, safer LVGL Apps? Let's find out!

Can we use Zig to code PinePhone Apps? Maybe make them simpler and safer? Let's find out!

Let's build a complex IoT App with Zig and LoRaWAN... And run it on RISC-V BL602 with Apache NuttX RTOS

How we run Zig on the BL602 RISC-V SoC... With Apache NuttX RTOS

Pine64 is about to launch the PineDio Stack BL604 RISC-V Board with LoRa and Touch Screen... Here's how we automatically flash and test every new release of Apache NuttX RTOS for PineDio Stack

PineDio Stack BL604 RISC-V Board has an interesting problem on Apache NuttX RTOS... Too many GPIOs! Let's fix this with a GPIO Expander

How we created the Apache NuttX RTOS Driver for Hynitron CST816S I2C Touch Panel... For PineDio Stack BL604 RISC-V Board

Running Apache NuttX RTOS on PineDio Stack BL604 RISC-V board... With ST7789 Display, LVGL Graphics and LoRaWAN

RISC-V BL602 SoC with ST7789 SPI Display and LVGL Graphics Library... Let's make it work on Apache NuttX RTOS!

Reading the Bosch BME280 I2C Sensor with Rust Embedded HAL... On BL602 RISC-V SoC and Apache NuttX RTOS

Apache NuttX OS talks I2C with Bosch BME280 Sensor on BL602 RISC-V SoC... Thanks to the BME280 Driver ported from Zephyr OS

How we expose the UART Port on IKEA VINDRIKTNING Air Quality Sensor... And read the PM 2.5 data with PineDio Stack BL604 RISC-V Board

What's inside the EFlash Loader that flashes all firmware to the BL602 RISC-V SoC

How we automagically flash and test the daily build of Apache NuttX OS on BL602 RISC-V SoC

How we run Rust programs on Apache NuttX OS... And transmit a LoRa Message with Rust

Compressing Sensor Data with CBOR on Apache NuttX OS... By calling TinyCBOR Library

Porting Semtech's LoRaWAN Stack to Apache NuttX OS... And testing it on PineDio Stack BL604 RISC-V Board

Porting the LoRa Driver for Semtech SX1262 from Linux to Apache NuttX OS... And testing it on PineDio Stack BL604 RISC-V Board

How we transmit and receive data over SPI on Apache NuttX OS... By coding a NuttX Device Driver

How we build, flash and test the Apache NuttX operating system on BL602 and BL604 RISC-V SoCs

How we test the pre-production PineDio LoRa Gateway by Pine64... And connect it to The Things Network

How we build a LoRa SX1262 Driver for PineDio USB Adapter... And test it on Pinebook Pro

How we monitor our IoT Sensor Devices connected to The Things Network... With Prometheus Time Series Database and Grafana Dashboards

How we decode CBOR Sensor Data inside The Things Network... With a CBOR Payload Formatter

How we read the Internal Temperature Sensor on the BL602 and BL604 RISC-V SoCs... And transmit to The Things Network

Can we use Roblox to monitor and control an IoT Device... Through LoRaWAN and The Things Network?

How we compress Sensor Data with CBOR... And transmit over LoRaWAN on the BL602 / BL604 RISC-V SoC

How we visualise Sensor Data from The Things Network... With a Custom MQTT Data Source in Grafana

How we join The Things Network and send data to the cloud on the new PineDio Stack BL604 RISC-V Board

How we test LoRaWAN on the new PineDio Stack BL604 RISC-V Board

Can we drag-and-drop Rhai Scripts... And run them on WebAssembly and BL602 RISC-V SoC?

What's it like to create Open Source Software for brand new prototype hardware? Read on to find out!

Can we run Rust Firmware for BL602 RISC-V SoC in a Web Browser... Simulated with WebAssembly?

How we create Rust Firmware that reads Analog Inputs... With the Analog-to-Digital Converter on RISC-V BL602

What's inside the Bouffalo Lab RISC-V BL706 Audio Video Board... And how it differs from BL602

What happens inside the WiFi Driver on RISC-V BL602... And how we found the incomplete source code for the driver

How we run TensorFlow Lite on RISC-V BL602... To create a Glowing LED

All about the BL602 RISC-V Bootloader... And how it loads the Application Firmware into XIP Flash Memory

How we simulate the BL602 RISC-V SoC with uLisp in WebAssembly... And preview Blockly uLisp Apps in the Web Browser

Porting the uLisp Interpreter to PineCone BL602 RISC-V Board... And writing graphical programs with Blockly (Scratch)

How we connect PineCone BL602 RISC-V Board to LoRaWAN... With the Pine64 RFM90 LoRa Module

How we set up our own LoRaWAN Network with RAKwireless RAK7248 WisGate Developer D4H Gateway... And test it with RAKwireless WisBlock in Arduino

How we build, flash and run Rust firmware on BL602 RISC-V SoC... With the BL602 IoT SDK

How PineCone BL602 RISC-V Board with SX1276 receives LoRa packets... Transmitted by RAKwireless WisBlock

How we receive LoRa packets transmitted by PineCone BL602 RISC-V Board ... With RAKwireless WisBlock in Arduino

How we transmit LoRa packets on PineCone BL602 RISC-V Board ... With Semtech 1276 or Hope RF96

Your free open-source resource for learning RISC-V BL602 SoC

How we render an image with PineCone BL602 RISC-V Board ... On Grove Triple Colour E-Ink Display with UART Interface

How we render text and graphics on PineCone BL602 RISC-V Board ... With ST7789 SPI Display and LVGL Graphics Library

PineCone BL602 RISC-V Board talks to BME280 Sensor over SPI... Let's find out how

How we call the BL602 RISC-V Hardware Abstraction Layer to access the BME280 I2C Sensor

How we ported the BL602 RISC-V Hardware Abstraction Layer to Apache Mynewt ... Starting with GPIO

Explore the BL602 GPIO and PWM Demo Firmware... And how they call the GPIO and PWM Hardware Abstraction Layer

What happens when we flash RISC-V firmware to PineCone BL602 Board... And what's inside the BL602 Boot Image, Partition Table, Device Tree and EFuse Configuration

How we port Apache Mynewt embedded operating system to the PineCone BL602 RISC-V Board

I made mistakes in 2020... Here's how I'll do better in 2021

How we build and debug Embedded Rust Firmware for PineCone BL602... With VSCode and GDB

How we connect PineCone BL602 Evaluation Board to OpenOCD... For flashing and debugging RISC-V firmware

What's inside the PineCone BL602 Evaluation Board... And how we're using it to contribute to the RISC-V Open Source Ecosystem

How we build a hand-drawn Watch Face for PineTime Smart Watch... Starting from WebAssembly to Embedded Rust

How we build PineTime Watch Faces with Rust and LVGL... And publish them on crates.io

How PineTime syncs the time over Bluetooth LE with Mynewt and NimBLE... And how we create Watch Faces with LVGL

Converting Embedded C to Rust is not that hard... Here's how we convert a PineTime Watch Face with LVGL from C to Rust on RIOT

Tired of pointer problems on Embedded C? It’s time to switch over to a safer, simpler way of coding: Embedded Rust. We’ll look at Rust hosted on RIOT and how it’s used to create LVGL watch apps for PineTime Smart Watch.

Tired of pointer problems on Embedded C? It’s time to switch over to a safer, simpler way of coding: Embedded Rust. We’ll look at Rust hosted on RIOT and how it’s used to create LVGL watch apps for PineTime Smart Watch.

How we build and preview PineTime Watch Faces with only a web browser... No computer needed!

Learn to build PineTime Smart Watch Firmware in the Cloud... No computer needed!

Learn about Wayland and Ubuntu Touch on PinePhone... And how we build PinePhone Apps with LVGL

How we convert Go code to Dart and Flutter automatically with an Abstract Syntax Tree

How we manage state with the Bloc Library in the Flutter Companion App (Android and iOS) for PineTime Smart Watch

Getting started with PineTime Smart Watch

Creating desktop apps on Linux doesn't have to be hard... Let's build GTK+ 3 apps in Go with the gotk3 library!

How we build the Flutter Companion App (Android and iOS) for PineTime Smart Watch by converting Go to Dart

Bluetooth Low Energy apps are ridiculously easy to code with Flutter and Dart, let me show you how!

Making wasp-os truly awesome with full multitasking, interoperable firmware updates and a common companion app

Observe step-by-step the Wireless Firmware Update running on PineTime Smart Watch (nRF52) with MCUBoot Bootloader, NimBLE Bluetooth LE Stack and Apache Mynewt

Wireless Firmware Updates done right on PineTime Smart Watch... With the open source MCUBoot Bootloader from Apache Mynewt and Zephyr

Configure Mynewt OS to enable access to SPI Flash Memory on PineTime Smart Watch

Flash any firmware to PineTime from our mobile phone... Without opening the watch!

Running Retro Games with Rust is not that hard on PineTime Smart Watch. Here's how I ported a CHIP-8 Game Emulator to PineTime

Create and edit Embedded Rust programs visually by dragging and dropping blocks

Have humans become so greedy for profit… That we have forgotten how to teach one another and advance our species?

VSCode debugging configuration for RIOT

Coding in Embedded C is like building a skyscraper without scaffolding

Using only a Raspberry Pi, we can debug the firmware on PineTime Smart Watch: Step into the flashed program line by line, set a breakpoint to pause execution at a line, inspect variables at runtime, … Just like the Embedded Pros!

Instead of sending SWD data over GPIO one bit at a time, what if we could blast out the data over Raspberry Pi’s SPI interface?

Programming a PineTime is not that hard… All you need is a Raspberry Pi, some wires and a little creativity!

Simple tweaks like Batched Updates and Non-Blocking SPI can have a huge impact on rendering performance

Code Watch Apps in Rust the Declarative Way

5 years ago I decided to fix every link in the IoT Chain so that we can create really useful and affordable IoT gadgets, the Lean and Agile Way

Porting Mynewt OS to GD32 VF103 on RISC-V was a nightmare

Programming the Hynitron CST816S Capacitive Touch Controller

PineTime is the spiritual successor to BBC micro:bit

Many GD32 VF103 RISC-V developer boards are coming real soon... And Mynewt OS would be perfect for them

Set up an nRF52 mesh network, step by step, without any coding

nRF52 works with popular open-source tools on Windows and macOS like VSCode, OpenOCD, Rust and ST-Link

Let’s build a simple gadget that determines its current location based on received GPS signals… And transmits the location to a server via NB-IoT

Peek into the LiteOS + Application source code that was bundled with the NB-IoT Developer Kit

Learn to optimise the power consumption of the NB-IoT Sensor Application in the previous tutorial

Create and edit Embedded Rust programs for STM32 Blue Pill and Apache Mynewt… By dragging and dropping blocks!

Watch what happens behind the scenes when you create a Visual Embedded Rust program

Hardly anyone writes embedded programs in Rust for microcontrollers (like STM32 Blue Pill), we all use C. But we really should switch to Rust!

Let’s build an IoT sensor with a real microcontroller — STM32 Blue Pill — and a real NB-IoT module — Quectel BC95-G!

How to use a Quectel evaluation board to send a CoAP message to the CoAP server hosted at thethings.io

Simpler embedded coding, the visual way

Declarative and Procedural Macros (plus bindgen and tips for Visual Studio Code) to protect Embedded Rust coders from stumbling into embedded traps

It’s time to drop our legacy programming practices and adopt smarter, safer ways to exploit these microcontrollers… starting with Apache Mynewt and Rust.

Let's build a Sensor Network running on two Blue Pills with nRF24L01 and ESP8266

Friendlier for newbies, supports ESP8266 WiFi and nRF24L01

And WiFi Geolocation with ESP8266

Apache Mynewt is a free, open-source realtime operating system for microcontrollers

AWS IoT Rules Engine and Kinesis Firehose were designed to stream live sensor data into Redshift for storage and analysis

With AWS Glue it’s now possible to keep our Redshift data warehouses in sync with JSON-based data stores… So we may exploit the full potential of business analytics and machine learning in AWS!

With Lambda Layers it’s really easy to connect our Node.js Lambda Function to Redshift or PostgreSQL

How do we upgrade the Bootloader when it’s always running in the background, waiting for flashing requests? This article explains a special technique I used to upgrade the MakeCode Bootloader over WebUSB… I call it “Baseloading”

Explore the innards of the MakeCode Bootloader that I have ported to Blue Pill

Computing sensor values in IoT devices can be prone to bugs… And Unit Testing can help to stop the bugs before they pollute the entire IoT chain

Filling in tiny math functions with nano-float

Learn the tips and tools to prevent Blue Pill Bloat

STM32 Blue Pill is a remarkable microcontroller for US$ 2. I proved it by running the USB Storage, USB Serial, USB DFU (Direct Firmware Upgrade) and WebUSB interfaces all on the same Blue Pill concurrently, without any additional hardware!

This work-in-progress document describes an incomplete implementation of STM32 Blue Pill visual programming

I teach Sigfox to working professionals. Here are their questions…

如果您可以將您以電池供應電力的BBC micro:bit設置在城市裡的任何一個角落來收集感測資料 … 或者是隨時查看從家裡、學校、工作場所即時更新的感測資料 … 不是很酷嗎？

Wouldn’t it be cool if you could plant your BBC micro:bit anywhere in the city (powered by batteries) to collect sensor data… And watch live updates of the sensor data from your home, school, workplace, … Even on the go?

使用 BBC micro:bit 連接 Sigfox 物聯網網路會是一個很好幫助孩子們理解感測器與感測網路如何運作的理想方式。micro:bit 是新式以電池提供電力的感測器裝置典範，具備充足的處理能力並支援大多數的感測器類型。在教育用途上，Sigfox 可能是今日用於城市規模測試的感測網路之中，最為便宜的方案。

BBC micro:bit connected to the Sigfox IoT network is the perfect way to help kids understand how Sensors and Sensor Networks operate. The micro:bit is a good representation of a modern battery-powered sensor device, with ample processing power and support for most types of sensors. For education, Sigfox is likely the cheapest option today for experimenting with a city-wide sensor network.

以 STM32 微處理器為核心的 STM32F103C8T6 Blue Pill 開發板連接 Sigfox 收發器模組來接取 Sigfox 物聯網網路可能會是設計一款低功率物聯網裝置的最佳組合。

STM32 “Blue Pill” microcontroller connected to a transceiver module for the Sigfox IoT network might be the best combination for low-power IoT devices right now.

This article that explains all that I have learnt about SPI ports, DMA and interrupts on the Blue Pill

As we learn how to program the FPGA, we’ll soon realise that FPGA programming is really extraordinary, unlike any other kind of programming we have done before

Upsizing from Arduino Uno to a 32-bit STM microcontroller doesn’t have to be hard

Using the cocoOS task scheduler to run Sensor Tasks concurrently while waiting for the Network and UART Tasks

Juggle multiple Arduino sensors, using an open source library for cooperative processing: cocoOS

Since FPGAs are already mainstream, could we use them to create IoT devices that are more power-efficient than current devices based on microcontrollers?

Let's learn Rust, a modern systems programming language that promotes safe, concurrent low-level coding

Here’s the story of the first gadget that I have ever created, with help from the brilliant minds at Seeed in Shenzhen

Better tools for building robust and reliable programs for microcontrollers

Could Alibaba Cloud be the economical cloud for high volume IoT?

How to implement a Finite State Machine on the Arduino Uno

How to experiment with IoT today while minimising the security and performance risks, and keeping costs low

Arduino, Low Power Networks, IoT Networks, IoT Analytics, ...

Lup Yuen talks about two classes of IoT, ‘deep’ IoT and ‘wide’ IoT. Deep IoT devices require high bandwidth and power supply. UnaBiz looks at wide IoT, which refers to devices that are very light, battery-powered and operate on pervasive networks. They can work anytime, anywhere in Singapore and do not rely on WiFi or the cellular network.

Building highly reliable, robust and scalable systems for processing Sigfox messages

Co-created with Upton Lai, the brilliant guy who could make anything

IoT is about solving real problems (not imaginary ones) in a sustainable way

This invention relates to a system for displaying video content streamed from a network in a full screen mode. The system receives receiving a network address based on a selection from a user. The system then transmits a request for content from the network address and subsequently receives the content associated with the network address. A search is performed on the content for data that provides displaying a video content in a full screen mode. Upon detecting the data, the process generates the data and displays video content in full screen mode.

A system and method for providing mobile services, the system comprising: a mobile device executing a client application for generating a mobile service request; and a hub server for receiving and processing the mobile service request, wherein the mobile service request comprises location data of the mobile device, and the hub server pushes one or more mobile service offers to the mobile device based on the location data. The method comprises executing a client application for generating a mobile service request on a mobile device; receiving and processing the mobile service request at a hub server; and pushing one or more mobile service offers from the hub server to the mobile device based on location data, wherein the mobile service request comprises location data of the mobile device.