Awesome

gosmc

A Go library to read and write Apple SMC on Macs.

This uses C-binding to Go, so you will need to use cgo for it to work.

Usage

run go get github.com/charlie0129/gosmc

package main

import (
	"fmt"

	"github.com/charlie0129/gosmc"
)

func main() {
	c := gosmc.New()

	// Open connection to SMC.
	_ = c.Open()

	// Close conncetion once we are done.
	defer c.Close()

	// Write 0x2 to CH0B or CH0C (to disable battery charging)
	_ = c.Write("CH0B", []byte{0x2})

	// Read value from CH0B
	v, _ := c.Read("CH0B")
}

CLI

There is a command line program included to RW SMC. Run make to build it. The binary will be bin/gosmc.

Example:

# Read from CH0B
bin/gosmc -k CH0B
# Write 0x02 to CH0B
bin/gosmc -k CH0B -v 02

Future work

Currently, it only does read and write using byte array. It provides no data conversion to common types like int, float, string. It can be beneficial to provide such conversions.