Category: Mcu
Issues with printf function
The C library function printf() is one of the common used functions in embedded systems world to debug the code in real time over a serial connection. Using the printf() over serial is under debate and may not be optimal for embedded systems and that’s what Jacob Beningo over EDN tries...
Continue ReadingESPUSB – An USB Software Stack For ESP8266
ESP8266EX and even the new ESP32 SoC lack a USB hardware transceiver, so [CNLohr] decided to develop a USB software stack for ESP8266. After a quick search, I think it is the first try to do a USB software stack for esp8266. USB software stack is a firmware-only implementation of a USB....
Continue ReadingUsing Bluetooth LE in Products
Jone Teel over Makezine walked through how to use BLE (Bluetooth Low Energy ), aka Bluetooth smart, in an electronic product. BLE, unlike classic Bluetooth, it's not designed for big data transmission or streaming audio or video. BLE comes in SoC (System on Chip) ICs which combine a RF...
Continue ReadingHow to Upgrade Your ESP8266 SPI Flash to 4MB
ESP8266, the well known WiFi module contains an ESP8266EX SoC IC and an external SPI flash. This external SPI flash is used together with ESP8266EX to store user programs. The supported size of flash by ESP8266EX is up to 16MB but some of ESP8266 modules contain flash chips with low...
Continue ReadingAriCalculator – A homemade handheld calculator
The AriCalculator is a DIY calculator or a general purpose handheld device. It is battery powered and runs on a NXP S12G240 microcontroller (16-bit, 240k flash, 11k RAM). The device has 38 input keys and a 128x64 pixel LCD display with a backlight option. Three interfaces connect...
Continue ReadingThe First Release of ESP-WROOM-32 Module Datasheet
It has been a while from the announcement of the new SoC ESP32 from Espressif. Recently, Espressif released the ESP-WROOM-32 module which is based on ESP32 SoC, the big brother of the well know ESP8266 WiFi module. ESP32 is a 2.4 GHz Wi-Fi and Bluetooth combo chip with dual CPU cores...
Continue ReadingESPTool – A WiFi Security Tool
Daniel Grießhaber over hackaday.io created a project called ESPTool. It is a tool to test WiFi networks security and to demonstrate how easy it is to crack a WiFi password or jam a WiFi network. Daniel designed ESPTool for education and self-test purpose. The Device has SSD1306...
Continue ReadingHT48R002 A Very Cheap OTP MCU as Low as $0.085/Unit
A highlight from CNXSoft about Holtek HT48R002 MCU as the cheapest MCU. HT48R002 is a 8-Bit OTP (One Time Programming) MCU with the following key features (datasheet): 8-bit RISC MCU @ 8MHz. 1K x 14-bit ROM (OTP). 64 x 8-bit RAM data memory. 6x I/O including 1x external...
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