noled v2.1 is a cleanup release. The following was changed since v2.0:

the release plugin was slimmed down to the production policy only: 5.3 KB filesize, under 1 KB of resident kernel memory (v2.0: 30 KB / ~186 KB)
zero file I/O: no config file read, no logs written - fixes v2.0 appending a heartbeat line to ux0:data/noled/probe.log every 10 s without bound; ux0:data/noled/ is no longer used and can be deleted
all research/diagnostic machinery moved to a build-it-yourself dev harness (dev/); releases ship only noled.skprx
LED behavior is unchanged and was re-verified on hardware
Below the original release notes for v2.0:

First known software control of the PCH-2000 (Vita Slim / Vita 2000) green power LED - the feature requested in rereprep#3 since 2018.

Vita 2000 / PCH-2000: power LED dark whenever the console is on; orange charging indication preserved (shows while actually charging, incl. in standby); re-applied automatically ~2s after every wake
Vita 1000: unchanged classic behavior (home button + game card LED off) - the plugin autodetects the model
boot plugin only: no app, no configuration file needed
bonus: the standby blink sequence is suppressed too (one short final blink remains, generated inside the syscon MCU)
Install: copy noled.skprx to ur0:tai/ (or ux0:tai/), add it under *KERNEL in your taiHEN config.txt, reboot.

Name	Version	Released	Hits	DL Link	QR
noled.skprx	v1.2	08/16/17	1175	Download	QR
noled.skprx	v1.1	07/30/17	975	Download	QR
noled.skprx	v1.0	04/23/17	980	Download	QR