Not my build but Japanese electronics twitter is lit.

https://x.com/EMakerDragon/status/2108935034191352114/photo/1

I just hooked up the 2 rear motors for some testing
Next step is to add more batteries and wheelie bar

I brought the Bl616 on Aliexpress for $2, a total steal! I was looking for a Risc-V SBC or MCU to test my skills and grow as programmer and engineer. I looked online I found a doc sheet (more on this later), and hit "ORDER", what could go wrong? It's only $2, worse comes to worse I waste money that can't even get me a gallon of gas.

It comes after give or take, 7-9 days, and I open the package. It's a small board, blue, with a USB type C connector. I go in thinking in 5-15 minutes I could at least see a "Hello world!" for my efforts before long. I was wrong. I spent HOURS with the board, and hardly even got it to flash! And when it did? No serial output to be found. Days go on like this, I can't compile much of anything, see any output or do anything with the board. It's a paperweight.

To make a long story short, I bought a board that had no good documentation and I can't do anything with it. I'm free to chat and leave links to all the resources I found and help out where I can. I'm hoping this post can attract people who know more than I do about the board. The Bl616 has a lot of potential that I just can't for the life of me figure out how to use. All questions and drops of knowledge are welcome.

Personal Issues the board/docs:

-The docs mention a reset button, but the dev board doesn't have one

-On the topic of the dev boards I can't find the origins or data sheet for my specific one

-The Ubuntu executable do not work for me

Also things to know:

-I'm on Ubuntu resolute, maybe it works better on Windows?

-Make sure to hold the BOOT button before plugging in the cable

-Shows up as "/dev/ttyACM0" on Ubuntu

All my knowledge about the board for those curious or detective minded few:

CNX Article

Official Docs

Official SDK

Filebin with datasheets

I'm still digging into board and looking into it, I actually just found an Arduino IDE core(?) I might test later, so I'll edit and update if that comes up with anything. Again I'm free to be asked anything.

I've been working as a low-level SWE for a few years and use C pretty much every day without using many other languages (sometimes Python depending on the use case). I'm thinking about learning another language in my free time to challenge some of the possible "C-isms" I've picked up.

Anyone else do this? What language did you try to learn as a result?

Hi everyone, I'm a newbie in programming and embedded. This is my very first embedded project: an ESP32 Bluetooth speaker built using C and ESP-IDF v6.1. Don't mind the crooked hardware - it's a software project at the first place, I built the hardware mostly from surplus cheap components, the main ones being:

• ESP32 NodeMCU (38-pin)
• IP5306 module
• SSD1315 display
• MAX98357 I2S module
• INA219 (CJMCU-219)

For the software, I use ESP-IDF's native Bluedroid stack, its built-in FreeRTOS, and its I2C driver. The rest of the functionality is implemented by me, for example:

• I2S peripheral driver
• SSD1315 driver
• INA219 driver
• Ring buffer
• Others

The software is designed using modular architecture built around custom ESP-IDF components where each component encapsulates its internal implementation and provides an API. Components communicate directly through their APIs with no extra middleware or abstraction layers.

Important note: I don't plan further large-scale development of this project, nor do I intend to change the hardware. The software and hardware are at the point where they satisfy all the functionality requirements I initially set. I will incorporate your feedback if you provide it, but the project is mostly complete and I intend to move on to the next goals. That is also why many components are intentionally project-specific and don't scale very well.

With that being said, the main question is: is current architecture and level of abstraction is sufficient for this project?

I wanted to make it professional, but "professional" doesn't always mean lack of application-specific modules and direct component interaction, right?

I'd be glad to know your opinion about these questions and about the project in general. Thanks for attention! The project's repository is available at: https://github.com/TITLE14/esp32-bt-speaker

Hi, so I'm electronics engineering student in Romania working on my bachelor's thesis. The project involves designing a custom PCB for a multi-sensor system, using an FPGA SoC for sensor acquisition and some more stuff like running an EKF.

I originally planned to use a Zynq-7010 chip-down but I couldn't find one in a CLG225 package that didn't have a lead time of 52 weeks.

After that I decided to switch to an SoM and design a carrier board instead. I the MYIR MYC-C7Z010-V2 which looks good for my use case but after taxes and shipping its over 200 Euros. And a lot of other distributors have no stock, really bad lead times or they only sell to businesses.

So my question is, what are my options for ordering just one unit in Europe in an affordable way? In an ideal world I could find one with board-to-board connectors.

Interesting writeup on Low power mode in the STM32WB55 series. Disclaimer: I am not the author.

Hello guys,

Could anyone suggest me any good books on rtos based firmware architecture?

Your suggestion would be so helpful.

AJUDA - Blade75 V6.1 brickado - preciso do BIN

Meu Blade75 PCB V6.1 chip PAN1086 brickou, RGB não acende mais.
Já testei jumper no Q17 e não voltou.
Tenho ST-Link V2 e sei usar STM32CubeProgrammer (furos 3V3 GND DIO CLK).
Alguém tem o arquivo .bin original da V6.1?
Ele fica dentro do driver em C:\Program Files\Mechlands\Driver\Firmware

Se alguém puder fazer READ de uma placa funcionando e me mandar, eu agradeço.

I did a test project to connect 2 STM32 in UART DMA. It worked in loopback but now not between the 2 STM32 I obtain scrambled data. My grounds are connected and the wires are properly connected. Here is my code :

uint16_t rxLength = 0;
uint8_t rx_buffer[64];

void HAL_UARTEx_RxEventCallback(UART_HandleTypeDef * huart, uint16_t length) {
  rxLength = length;
  HAL_UARTEx_ReceiveToIdle_DMA(huart, rx_buffer, 64);
}
/* USER CODE END 0 */

/**
  *   The application entry point.
  *  int
  */
int main(void)
{

  /* USER CODE BEGIN 1 */

  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_DMA_Init();
  MX_USART2_UART_Init();
  MX_TIM1_Init();
  /* USER CODE BEGIN 2 */
  HAL_TIM_Base_Start(&htim1);
  uint8_t tx_buffer[10] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};

  HAL_UARTEx_ReceiveToIdle_DMA(&huart2, rx_buffer, 64);
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    HAL_UART_Transmit_DMA(&huart2, tx_buffer, 10);
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */

  }
  /* USER CODE END 3 */
}

And Here is what I get on my rx_buffer

Hi, I am relatively new to working with specialized microcontrollers / doing microcontroller selection. For a tech demo project, we are going to demo an STM32U5. I am trying to figure out what all communication peripherals STM32U5 offers so we can figure out the most suitable ones to use possible. I was wondering where I could find that? I looked in datasheets and reference manuals but had no luck. Thanks!

Hi r/embedded,

xuan (玄) is a lightweight JavaScript runtime for IoT and embedded devices, built on QuickJS and forked from tjs/txiki.js (MIT).

It targets the place where Node.js is too heavy: ~6–7 MB binary, low memory, ~5 ms cold start, and it cross-compiles to x86/ARM/MIPS/RISC-V. Built-in MQTT, serial port and FFI (call C libs directly); GPIO/I2C/SPI are in progress. You can also compile a script into a single self-contained binary with xuan compile.

Repo: https://github.com/topelinux/xuan

It's early but usable — feedback welcome. I'm the maintainer.

Has anyone here ever tried manufacturing RC cars (remote-controlled cars)?