ST-Link STM32 Emulator, Aideepen ST Link V2 Stm32 Programmer Unit mini STM8 STM32 Emulator Downloader M89 New (Random Color)

Works as it should. I would immediately toss the metal case, you don't want to get a short and make something go up in smoke. You don't need it anyway, and some of these come with cases that are labeled incorrectly so throw it away. Looks better without it too.

I am hoping to use this to program the Arduino Uno V4 with the spi pins.I have the Arduino IDE App on my computer.Information seems to show this is for a different Arduino board.Wayne

I purchased an OEM ST-LINK v2 from an authorized distributor because I figured that was the path to the least amount of headache. As usual, my figuring needs re-figurin', because I never could get it to recognize in CubeProgrammer and the only thing it would do in ST-LINK was the firmware upgrade. At the advice of a friend I picked up this much cheaper option with better labeling and a nice form factor. Plugged it in, everything worked immediately in CubeProgrammer and I was able to read and write to my STM32 with no issues.Skip the official STM programmer, get this knockoff and save yourself money and hassle.

Allow me to say that I was apprehensive of what quality I would receive with this ST Link V2 "clone". But low and behold what arrived is a properly soldered, genuine ST programmer. You can see where the silk screening was partially removed on the chip itself. But it is indeed a genuine ST chip. Took the firmware upgrade perfectly. I highly recommend this. No junk here.

works perfect

I usually don't write bad reviews, but this thing deserves it. There are a lot of things not to like about this device. I haven't been this disappointed in a purchase in a while.The first thing I found is that the connectors on the ribbon cable that is provided with the device do not actually fit the pins on the device. They just fall right off.Next, it turns out that there is no SWO connection on this programmer. So no ITM output when debugging. This is a fundamental component of ST/Link and SWD and an invaluable diagnostic tool. It's a complete fail not to provide this.Lastly -- it does not work well. The device is not always detected properly and when it does, openocd cannot open the programmer. That said, the STM32CubeProgrammer found it and could use it.And a warning -- this thing will attempt to power the connected device via the 3.3V connection. ST/LINK uses the power pin for level shifting low voltage devices and is designed to *draw power* from the board. You risk damaging the DUT and/or your USB port if you connect any of the power pins to a proper ST/Link device interface.This thing is designed by someone without a clue. Just use a real ST/Link programmer or the one built into an STM32 Nucleo64 board.

Just what I needed to downgrade my scooter's firmware

These dongles do what they're advertised to, and function properly as a STLink debugger. However, if you plan to use any custom firmware, it is important to note that the processor inside is a CS32F103C8T6, a Chinese variant of the F103, and only has 64Kb of flash, half of the 128Kb usually found in STLink devices. Additionally, the hardware idcode is different, and tools like openocd will not work without configuration changes.Overall, both dongles I recieved at least did what they said they would do.