I got one of these and updated the firmware. After that, it worked for 2 days and now it won't return a device descriptor. Is that common?

I updated both units I have with no issues.

How do you get the pcb out of the case? i want to check pinouts on the silkscreen vs. the case. thank you...

Based on others who have opened the case...the silkscreen is accurate for Hiletgo . This was the case for mine even those it was reversed from the picture. So I chose not to open the case and trusted the markings with good results. HiLetgo has several manufacturing batches ...but the markings match the hardware it seems.

Can someone tell me what exactly these are for? Can i reprogram an electric scooter?

Used mine to reprogram my frsky R9 module

St Link V2 Emulator Downloader Programmer Stm32f103c8t6 Stm8 Stm32 Cable

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Sold byAmazon AustraliaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Power your projects with precision and protection!

FUTURE PROOF FIRMWARE - Automatic firmware upgrades keep your device cutting-edge without hassle.
PLUG PLAY SIMPLICITY - Clear interface markings eliminate guesswork—just connect and code.
ROBUST 5 V POWER OUTPUT - Enhanced power delivery with built-in I/O port protection guards against operational errors.
DURABLE ALUMINUM HOUSING - Compact, anti-static, and shock-resistant design built for on-the-go pros.
UNIVERSAL STM 32 STM 8 SUPPORT - Seamlessly debug and program across popular STM microcontrollers with broad software compatibility.

The ST-Link V2 Emulator Downloader Programmer is a compact, durable tool designed for professional developers working with STM32 and STM8 microcontrollers. Featuring a boosted 5V power output with I/O protection, a flexible 20cm DuPont cable, and clear interface markings, it supports fast, stable debugging and programming. Its automatic firmware upgrade capability ensures ongoing compatibility with the latest STM products, all housed in a sturdy aluminum shell for portability and durability.

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