<![CDATA[Topics tagged with power]]>https://www.community.lilygo.cc/tags/powerRSS for NodeSun, 08 Mar 2026 20:26:41 GMTFri, 12 Apr 2024 00:17:42 GMT60<![CDATA[Detecting USB Power in code on T-Display-S3]]>@hpro This only a community site, with mostly me.
You could try their GitHub repository and raise an issue:
https://github.com/Xinyuan-LilyGO/T-Display-S3/issues
Lithium batteries do not lose voltage as they are used up, They all of a sudden die!
My suggestion was to calibrate the voltage at USB conditions and anything less than that, accounting for ADC drift would indicate that it was on battery only, no USB.
-Terry

]]>https://www.community.lilygo.cc/topic/939/detecting-usb-power-in-code-on-t-display-s3https://www.community.lilygo.cc/topic/939/detecting-usb-power-in-code-on-t-display-s3Fri, 12 Apr 2024 00:17:42 GMT<![CDATA[T-can485 q Re usb use while powered externally]]>Hi,

Starting a build for solar controller interface (rs485).

Question regarding power isolation, I will be powering the t-can485 externally. Is the power appropriately isolated so that the usb can be connected (for serial interaction) without removing external power from the board?

(If interested, Solar controller presents 7.5V regulated and rs485 on a single rj45)

]]>https://www.community.lilygo.cc/topic/537/t-can485-q-re-usb-use-while-powered-externallyhttps://www.community.lilygo.cc/topic/537/t-can485-q-re-usb-use-while-powered-externallySat, 19 Aug 2023 14:35:55 GMT