AITRIP 1PCS ST-Link V2 Emulator Downloader Programmer STM32F103C8T6 STM8 STM32 with Cable (Random Color)

It's cheap, and it works. No problems connecting, and super easy to use. 5 Stars.

Does the job connected without a issue

Works as intended, has a stable connection in comparison to some cheaper ones you can find. I used it to reprogram a 32bit ESC and had no issues. My only complaint is the jumper wires that it came with, they were a bit stiff but I just used my own.

The AITRIP ST-Link V2 Programming Unit was immediately recognized by ST's own STM32CubeProgrammer software which I used to update it's firmware to the latest. I then connected my STM32 device and had zero issues recognizing the device and flashing it with the updated software.I should have just ordered this one from the start, but I thought I could avoid problems by using the official ST-Link/v2. Nope. The official device was apparently defective. It came with very old firmware that I was eventually able to update, but it never recognized the device I was trying to program. I tried using both VCC pins and every GND pin. Nothing worked.Learn from my experience, save yourself time and money and just order this. If you're afraid of getting a faulty unit order the 5-pack and you're still only spending 25% of what the official would cost you. (yes, I'm pretty annoyed at the time wasted trying to get the defective official product to work, but this review is my healing therapy).

Simple device. Works as intended.

Does what I needed.

I had to update the firmware on them which STMCubeIDE 1.7 informed of automatically. Update can be the tiniest bit confusing but just try unplugging them and clicking update again and it should work if cube ide gives a dfu error. overall very happy with purchase and price! Im using these on STM32 blue and black pills without any issues. Just make sure to enable serial wire debugger if you want to debug

1 out of 5 was defective, so all in all still an decent deal cost-wise (about $5 each for the 4 good ones). But I can't give more than 3 stars due to the broken one.The units came with firmware V2J29S7 installed (what's with the weird version numbers, ST?). I didn't try flashing or debugging with the installed firmware - the ST utility took a long time just to print out the serial number/firmware revision. Firmware updates worked smoothly, bringing them to V2J40S7. With that firmware installed, the devices responded quickly and were able to flash my project perfectly.Pay attention to the pin out diagram - it's different than what is often posted on the Internet. Apparently there are at least two pin outs (maybe more) commonly used with ST-LINK clones.It should be no surprise that the microcontroller used on the device isn't an STM32 like on genuine ST-LINKs. It's a "Geehy" (which I've never heard of before) APM32F103C8T6.I plan to use these to give to non-developers who might need to flash the project for testing, etc. Flashing will be handled by a script, so as long as that works I'll be happy. If you're doing serious development & debugging, I'd suggest getting a genuine ST-LINK/V2 which are around $20 - when they're in stock (which, like today, is often not the case given supply chain shortages now). Those things are rock solid and work great.Bottom line is that these seem to be a good value even with a 20% failure rate - will buy again if I need more.