Abriu uma empresa? Cuidado com o golpe do Registro Dominio nirebr.com
É sempre assim: você abre uma empresa e começa a receber boletos para pagar, alguns são legítimos, mas muitos são pessoas e empresas querendo aplicar algum golpe (scam em inglês). Vou reproduzir o...
View ArticleTesting the new WiFi driver to ESP32
We are working in a new WiFi driver to ESP32 to make it more agnostic, but it is working fine: nsh> wapi psk wlan0 MyPassword 3 [ 160.770000] [CPU1] esp_wifi_sta_password: WiFi station...
View ArticleFree and open-source Layout/GUI design tool
Some time ago I was searching for an alternative to zeplin and found “penpot.app”, it is very powerful: https://penpot.app
View ArticleWorkaround to Chromium not seen mounted files
Unfortunately Chromium only allows users to see local home files. But we can bypass this limitation with this trick: $ mkdir ~/Desktop/mountmirror$ sudo mount --bind /mnt/discpartition...
View ArticleTesting NuttX SoftAP on ESP32
These are the steps I used to get it working: Configure, compile and flash the NuttX firmware on your ESP32: $ ./tools/configure.sh esp32-devkitc:sta_softap$ make download ESPTOOL_PORT=/dev/ttyUSB0...
View ArticleFlashing STM32H745I-DISCO board
$ sudo openocd -f interface/stlink.cfg -f target/stm32h7x.cfg -c init -c "reset halt" -c "flash write_image erase nuttx.bin 0x08000000" Open On-Chip Debugger 0.11.0+dev-00062-g6405d35f3-dirty...
View ArticleUsing Internet in the NuttX running on simulator
When using NuttX with TCP/IP support in the simulator you will not get network to the Internet. No ping to google, etc.Fortunately it is easy to fix: $ sudo sysctl -w net.ipv4.ip_forward=1 or $ sudo...
View ArticlePrimeiros passos com o AWS
Resolvi finalmente testar o Amazon AWS, depois de anos ignorando esta solução por achar a Amazon um dos maiores monopólios em relação ao Cloud Computing. Pra quem quiser começar, primeiro você terá...
View ArticleThe Feynman Lectures on Physics, Volume I
https://www.feynmanlectures.caltech.edu/I_toc.html
View ArticleComplete ESP32 Bluetooth Low Energy Initialization Log
rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT) configsip: 0, SPIWP:0xee clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00 mode:DIO, clock div:2 load:0x3fff0030,len:4...
View ArticleTesting ESP32 BLE support on NuttX
Clone the repositories: $ git clone https://www.github.com/apache/incubator-nuttx nuttx$ git clone https://www.github.com/apache/incubator-nuttx-apps apps Configure and compile: $ cd nuttx/$...
View ArticleBLE WIFI Coexistence crash
esp32_bt_controller_init: BT controller compile version [a4c513b]esp32_bt_controller_init: BT controller compile version [a4c513b]btdm_controller_mem_init]btdm_controller_mem_init: .bss initialise...
View ArticleNuttX ported to STM32H745I-DISCO board
This weekend I ported NuttX to STM32H745I-DISCOw board and got LVGL working on it. It is a nice board to run NuttX because it has a big LCD display with resolution of 480×272. Soon I’ll submit it to...
View ArticleBooting NuttX RTOS on ESP32 with WiFi+BLE COEX enabled
ets Jun 8 2016 00:22:57 rst:0x1 (POWERON_RESET),boot:0x1e (SPI_FAST_FLASH_BOOT) configsip: 0, SPIWP:0xee clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00 mode:DIO, clock div:2...
View ArticleSome IDEs for Embedded Systems
I don’t use IDE, but I decided to list them here because sometimes I forget the name of CodeLite, etc. Code::Blocks CodeLite Eclipse Embeetle
View ArticleCompression libraries for MCU
easylzma – https://github.com/lloyd/easylzma heatshrink – https://github.com/atomicobject/heatshrink miniz – https://github.com/richgel999/miniz lzsa – https://github.com/emmanuel-marty/lzsa
View ArticleNo module named SimpleHTTPServer
I used to run this command to get a simple HTTP Server using Python: $ python -m SimpleHTTPServer/usr/bin/python: No module named SimpleHTTPServer But as you can see it is not working anymore on...
View ArticleFlashing a MCU using cJTAG interface
Probably you already used the two wires SWD interface with some ARM Cortex MCU, but this interface is proprietary, ARM has patent and rights over it. Fortunately exists an alternative called cJTAG....
View ArticleQuick search about CO2 emission
I was interested to know about more CO2 emission after reading the BBC post “Why climate lawsuits are surging” https://www.bbc.com/future/article/20211207-the-legal-battle-against-climate-change I...
View Article