![]() If shows errors also in reading internal ram, it means there is something bad with the SWD connection between onboard stlink and nucleo mcu. Libraries 1.9.0 worked fine in my testing but that was quite some time ago. Make sure you follow the Wiki recommendations WRT the Arduino IDE settings for flashing as not doing so can create the exact situation you face. "memory display" is set by default to 0x08000000 (flash), set it to 0x20000000 (internal ram) and size whatever small (like 0x200), does it show memory (it should even if locks are enable in option bytes) or does it still report error? What error? If it shoes data, it means stlink SWD is ok, just messed up with the option bytes. In our experience, PlatformIO IDE for VSCode has the best system performance, modern interface for PIO Unified Debugger, and users have found it easier to get started.Key debugging features of PlatformIO IDE for VSCode. The blue status LED (on the Blackpill F411CE) may or may not come on as its not used as a status LED in this design. it tells "can't read memory, disable readout protecion" upon device connect to stlink utility. One is used for STM which are male pins and the second are female pins used for Arduino. ![]() In STM32 Nucleo there are two types of connection pins. It has an ARM Cortex 32 Bit microcontroller that comes only in a single package LQFP. STM32 Nucleo-64 development board with STM32F401RE MCU, supports Arduino and ST morpho connectivity. STM32 Nucleo F401RE is a low cost and quick to use a development board. Octopart is the world's source for NUCLEO-F401RE availability, pricing, and technical specs and other electronic parts. STM32F401RE Embedded Nucleo STM32F4 MCU 32-Bit ARM Cortex-M3 Evaluation Board. Find the best pricing for STMicroelectronics NUCLEO-F401RE by comparing bulk discounts from 8 distributors. If you see all the above but unknown flash size, it probbly means you have enabled some locking in option bytes (flash size, if i'm not wrong, is stored somewhare is OTP flash or bootrom, don't remember exactly). STMicroelectronics NUCLEO-F401RE technical specifications, attributes, and parameters. The Arduino connectivity support and ST Morpho headers make it easy to expand the. does the target cpu gets recognized (top right window)? Do you see Device, dev id, rev id, and flash size (unknown flash size or 512k)? If you see device and dev id, SWD between stlink and mcu is at least working. Nucleo F401RE provides the following hardware components: STM32F401RET6 in LQFP64 package ARM® 32-bit Cortex®-M4 CPU with FPU 84 MHz max CPU frequency VDD from 1.7 V to 3. The STM32 Nucleo board provides an affordable and flexible way for users to try out new ideas and build prototypes with any STM32 microcontroller line, choosing from the various combinations of performance, power consumption and features. ![]() Just to restrict the possible issue, i would suggest to open stlink utility and: stm32-nucleo-f401re-w5500-usr-es1 - A try to get work W5500 chip (on USR-ES1) on STM32 Nucleo F401RE.
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