did something

vendor/periph.io/x/conn/v3/physic/doc.go

@@ -0,0 +1,22 @@
+// Copyright 2018 The Periph Authors. All rights reserved.
+// Use of this source code is governed under the Apache License, Version 2.0
+// that can be found in the LICENSE file.
+
+// Package physic declares types for physical input, outputs and measurement
+// units.
+//
+// This includes temperature, humidity, pressure, tension, current, etc.
+//
+// # SI units
+//
+// The supported S.I. units is a subset of the official ones.
+//
+//	T  	tera 	10¹²  	1000000000000
+//	G  	giga 	10⁹   	1000000000
+//	M  	mega 	10⁶   	1000000
+//	k  	kilo 	10³   	1000
+//	m  	milli	10⁻³  	0.001
+//	µ,u	micro	10⁻⁶  	0.000001
+//	n  	nano 	10⁻⁹  	0.000000001
+//	p  	pico 	10⁻¹² 	0.000000000001
+package physic