<![CDATA[Issue with default Serial]]>Has anyone experienced error in Serial data transmission from an Atom Lite BUT ONLY when you simultaneously send Serial data to the Atom?

I have tested different boards (Teensy, Arduino NG, Arduino Nano), and this is the only one that has this issue.

I wrote about it here : https://github.com/m5stack/M5Atom/issues/86

If the computer does not send data to Atom Lite, the Atom send the sequence 0 to 255 without a problem.

But when I simultaneously send data from the computer to the Atom Lite, there is errors on the sending of the sequence from the Atom Lite.

What do you think is going on?

]]>https://community.m5stack.com/topic/6978/issue-with-default-serialRSS for NodeTue, 28 Apr 2026 20:42:24 GMTTue, 12 Nov 2024 22:56:37 GMT60<![CDATA[Reply to Issue with default Serial on Wed, 10 Dec 2025 16:29:02 GMT]]>@kuriko This seems to be related to the code on the CH552T chip onboard the M5Stack Atom Lite that emulates an FTDI chip (it is not an authentic FTDI chip!!!). There are packet losses when data is being sent and received simultaneously over USB serial.

]]>https://community.m5stack.com/post/30294https://community.m5stack.com/post/30294Wed, 10 Dec 2025 16:29:02 GMT<![CDATA[Reply to Issue with default Serial on Thu, 14 Nov 2024 09:42:40 GMT]]>@mrtof
Have you tried using other GPIO as serial port? As far as I know, the default serial is internal, and there may be other data interference.

]]>https://community.m5stack.com/post/27032https://community.m5stack.com/post/27032Thu, 14 Nov 2024 09:42:40 GMT