<![CDATA[Core S3 and DMX Module power problem [SOLVED]]]>If I use the power jack on DMX with a 12V power supply the S3 LCD is flashing without boot.
Any suggest?

]]>https://community.m5stack.com/topic/5718/core-s3-and-dmx-module-power-problem-solvedRSS for NodeTue, 12 May 2026 11:36:31 GMTWed, 18 Oct 2023 22:30:43 GMT60<![CDATA[Reply to Core S3 and DMX Module power problem [SOLVED] on Fri, 20 Oct 2023 01:05:48 GMT]]>Thanks @felmue, that was the problem.
Solved

]]>https://community.m5stack.com/post/22509https://community.m5stack.com/post/22509Fri, 20 Oct 2023 01:05:48 GMT<![CDATA[Reply to Core S3 and DMX Module power problem [SOLVED] on Thu, 19 Oct 2023 10:17:12 GMT]]>Hello @Telmo

your M5CoreS3 probably is running firmware with sets the 5 V as an output as soon as it starts to run, causing it to reboot again and again.

You can try to add below line after M5.begin(); to make sure 5 V is set an input.

  M5.Axp.powerModeSet(POWER_MODE_USB_IN_BUS_IN);

Can you share the code your are running?

Thanks
Felix

]]>https://community.m5stack.com/post/22499https://community.m5stack.com/post/22499Thu, 19 Oct 2023 10:17:12 GMT