hack News - Page 2 of 13 - CNX Software

November 10, 2021 by Jean-Luc Aufranc (CNXSoft) - 3 Comments

Ikea PM2.5 air quality sensor’s ESP8266 hack adds WiFi, MQTT, and Tasmota support

Ikea VINDRIKTNING PM2.5 air quality sensor functionality can be augmented with an ESP8266 WiFi board or module, and open-source firmware adding MQTT, or the popular Tasmosta firmware for more features. Out of the box, Ikea air quality sensor simply shows green (good), yellow (ok), and red (not good) colors to indicate the level of pollution with PM2.5 levels. But Sören Beye (Hypfer), who also happens to have developed Valetudo firmware for smart vacuum cleaners, has added a Wemos D1 Mini board to his sensor and developed open-source firmware with MQTT support. You’ll need to open the air quality sensor, and solder three wires between the ESP8266 board and the 5V, GND, and Tx (data) pin from the Ikea VINDRIKTNING mainboard. After flashing the firmware, you still get the original LED indicator plus PM 2.5 air quality data sent over MQTT and WiFi. The update system supports Home Assistant Autodiscovery with […]

March 1, 2021September 13, 2023 by Jean-Luc Aufranc (CNXSoft) - 2 Comments

A neat way to add a reset button to Raspberry Pi Pico

The Raspberry Pi Pico is a nice little board, but if you program in C language, you’d need to disconnect the micro USB cable each time you’d like to flash the UF2 firmware. That’s not convenient and could damage your board over time. The Raspberry Pi Foundation even decided to write a blog post explaining how to add a reset button to your Raspberry Pi Pico using a breadboard circuit. Here’s what it looks like. That works but you may want to use that breadboard for another circuit, so the reset button takes space. Another solution is to program with a Raspberry Pi board and use SWD mode to upload code using the debug port, instead of using mass storage (BOOTSEL) mode. I’ve also found out that most baseboards for the Pico board will include a reset button. But this morning, I’ve come across another solution that looks pretty neat. […]

February 9, 2021February 9, 2021 by Jean-Luc Aufranc (CNXSoft) - 2 Comments

iPod Classic given new life with Raspberry Pi Zero W & Spotify

Guy Dupont got a bunch of 2004, fourth-generation iPod Classic MP3 players from his mother-in-law, and instead of playing MP3 files on the media players, he decided to repurpose one with a Raspberry Pi Zero W to be able to stream music from Spotify over WiFi. The resulting project is called sPot (ess-pot), and looks just like an original iPod, but it’s a Linux device that can stream/search via Spotify with a UI written in Python and based on the original iPod experience. But apart from the enclosure, and the original “click wheel” there’s not much left from the original design. Besides the Raspberry Pi Zero W SBC and iPod enclosure, the sPod includesAdafruit Mini LiPoly/LiIon USB Charger and PowerBoost 1000 Basic boards for charging and power management, a 1,000mah,3.7V rechargeable li-ion battery, vibration motor discs For haptic feedback, a 2-inch Adafruit TFT display, and a few other components, wires, […]

February 1, 2021February 2, 2021 by Jean-Luc Aufranc (CNXSoft) - 4 Comments

FOSDEM 2021 Online February 6-7 – Hardware, Embedded & IoT talks

FOSDEM is an open-source developer event that takes place on the first week-end of February every year in Brussels, Belgium. Every year except this year, as due to COVID-19 restrictions, FOSDEM 2021 will take place online like most events these days. The schedule has been up for some time, and today I’ll look at some of the interesting talks mostly from the Embedded, Mobile and Automotive “virtual devroom” but also other tracks. Saturday, February 6, 2021 13:00 – 14:00 – From Reset Vector to Kernel – Navigating the ARM Matryoshka Long gone are the times of executing the OS in-place from memory-mapped flash upon reset. A modern SoC now comes with complex mask ROM firmware, with driver, filesystem, protocol and crypto support for loading… yet another bootloader. In his talk, Ahmad follows this chain of bootloaders until the kernel is started, stopping along the way for RAM setup, peripherial initialization, […]

January 27, 2021 by Jean-Luc Aufranc (CNXSoft) - 7 Comments

Mini replica of DEC PDP-11 computer runs 2.11 BSD UNIX on ESP32 SoC

The relatively popular Digital Equipment Corporation (DEC) PDP-11 16-bit minicomputers started selling in the 70s, and were still available in the earlier 90s. While being stuck in Europe due to COVID-19 restrictions, Jeroen Domburg (aka Sprite_tm) decided to design a tiny replica of a DEC VT102 PDP-11 terminal based on ESP32 wireless SoC and running 2.11 BSD UNIX through SimH PDP11 emulator. Jeroen had to do significant work to make SimH works on ESP32 however, with notably the need to optimize the memory footprint: Obviously, ‘just port SIMH to an ESP32’ is a bit of a understatement for the effort that was needed. Even while SIMH is a pretty nice program when it comes to not using any unique APIs, it still is a system developed for a full-blown workstation and assumes RAM is cheap and plentiful. In order to get it running on an ESP32 and still have some […]

November 25, 2020November 26, 2020 by Karl Johnson - 11 Comments

Ender 3 Pro 3D printer in late 2020 – Build and first prints

Karl here. How does the Ender 3 Pro 3D printer stand up in late 2020? The short answer is pretty well. With just a few minor gripes it is a solid printer. According to All3dp the Ender 3 Pro came out in September 2018. Over 2 years ago. It is the successor to the most popular 3D printer: the Ender 3. I usually don’t do any research so I won’t be influenced by other reviewers but I did in this case so I could see what the differences are between the Ender 3 and Pro versions. It has been upgraded to a Meanwell power supply. Better mainboard layout. Wider extrusion for the bed to ride on, which should make the bed more stable. If you have done any research on 3D printers I would say it is impossible not to have heard about the Ender 3. With its low price, […]

November 12, 2020November 13, 2020 by Jean-Luc Aufranc (CNXSoft) - 10 Comments

Tigard is an open-source FT2232H board for hardware hacking (Crowdfunding)

There is plenty of cheap 5V or 3.3V USB to TTL debug boards used to access the serial console and/or program boards, but FTDI FT2232H based Tigard open-source hardware board does much more than that as it supports multiple protocols, multiple voltages for hardware hacking & debugging. The developer explains Tigard can be used as a drop-in replacement for dozens of other hardware tools based on FTDI chips and includes native support OpenOCD, FlashROM, and more. Tigard board specifications: Main chip – FTDI FT2232HQ dual high-speed USB to multi-purpose UART/FIFO IC Primary port dedicated to UART including access to all flow control signals Secondary port shared among dedicated headers for SWD, JTAG, SPI, and I²C USB – USB 2.0 Type-C (480 Mbps) port I/Os 9-pin UART header Qwiic I2C connector 8-pin SPI & I2C header 8-pin JTAG header 10-pin Cortex debug header 14-pin logic analyzer (LA) header to observe device-level […]

August 26, 2020August 26, 2020 by Jean-Luc Aufranc (CNXSoft) - 10 Comments

NODE Mini Server V3 Transforms Raspberry Pi 4 Into a Server or Mini PC

Hardware hacker NODE has had a busy month starting with the announcement of Zero Terminal V3 modular Raspberry Pi Zero W powered handheld PC, and now he’s just showcased NODE Mini Server V3 that transforms a Raspberry Pi 4 into a compact server or mini PC. The project brings all ports to the same side in a similar fashion as Argon One enclosure through the use of custom adapter boards, but also enable easy integration of USB SSD drives, easier access to the MicroSD card socket, and support for fanless or dual-fan cooling. Besides the Raspberry Pi 4 SBC, NODE Mini Server V3 includes the following components: HDMI Micro HDMI Male Component. “Wedge Type” as this HDMI connector on Aliexpress. HDMI Type A Connector (47151-1001) USB Pololu USB 2.0 Type-C Connector Breakout USB-C Male Plug Breakout Board Male USB 3.0 Plug (692112030100) Female USB 3.0 Connector (48405-0003) Storage USB3 to […]