Chu Xiao

[Graciano Goudreau]

Atthis point, the chip enters Bootloader mode and the burn port appears again. Because the samd21 chip has two partitions, one is the Bootloader and the other is the user program. The product will burn a bootloader code in the system memory when it leaves the factory. We can switch modes by performing the above steps.

All three devices has this behaviour, steady green light on and nothing else.

I have read on this forum that someone has unbrick the Xiao with ST-LINK and OpenOCD, but having the same issue on 3 devices of 6 i suspect that all those boards has some heavy defect and i don`t want purchase accessories for something that i will never use any more.

So after 8 days from my last post there is no answer,this means that there is no solution or alternative to avoid this situation?

Just an update, i forgot that i had ordered an other Xiao from e-bay, and meanwhile an other one has bricked, so 4 out 7 are no more usable.

I met this problem mate.

You just go to this link: -Studio/ArduinoCore-samd/tree/master/bootloaders/XIAOM0

download the XIAO bin file then, Use SWD to burn the firmware into XIAO, it will be work again.

How to unbrick a dead xiao using raspberry pi [ GUIDE ][openocd]

So I really recommend you use the XIAO expansion board to connect with the XIAO, but you need to get a J-link device and download the J-link software. I have used this method to solve the problem, absolutely work.

A powerful functional expansion board for Seeeduino XIAO of only half Raspberry Pi 4 size. It enables build prototype and project in easy and quick way. With its rich peripherals including OLED, RTC, expandable memory, passive buzzer, RESET/User...

idk, I did some projects via using Seeedstudio products like grove modules, and other Arduino boards such as Wio terminal, Seeeduino Lotus, there is no problem for me, it depends on your PC everoment, cable or wrong operation that could make some accident. anyway, if you still keep using XIAO, just try the XIAO expansion board, it really convenient.

Jason XiaoAssistant Professor of AccountingSchool of Manageme...@binghamton.edu607-777-6854AA 224BackgroundJason Xiao received his PhD in Accounting and MA in Statistics from the Wharton School at the University of Pennsylvania in 2016.

Before pursuing his PhD, he earned a BS in Business Administration with Honors and Distinction, majoring in Accounting and Economics, from the Fisher College of Business at The Ohio State University.

Xiao's research focuses on agency conflicts and incentives in the context of both executive compensation and information disclosure and acquisition. His research also examines spillover effects between parties with potentially contrasting incentive schemes, highlighting costs and benefits to the involved parties that are not readily observable when analyzing the parties in isolation.

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