cmd/w1-therm/README.md

@@ -1,3 +0,0 @@
-This package provides support for using 1-wire DS18B20 with gokrazy!
-
-The package just loads the kernel module.

cmd/w1-therm/main.go

@@ -1,91 +0,0 @@
-// w1-therm is a gokrazy helper that loads 1-wire kernel modules on boot.
-//
-// Example:
-//
-//	Include the w1-therm package in your gokr-packer command:
-//	% gokr-packer -update=yes \
-//	  github.com/gokrazy/breakglass \
-//	  git.joco.dk/snr/fermentord/cmd/w1-therm
-package main
-
-import (
-	"bytes"
-	"flag"
-	"fmt"
-	"log"
-	"os"
-	"path/filepath"
-	"strings"
-
-	"golang.org/x/sys/unix"
-)
-
-func logic() error {
-	flag.Parse()
-
-	for _, mod := range []string{
-		"kernel/drivers/w1/wire.ko",
-		"kernel/drivers/w1/masters/w1-gpio.ko",
-		"kernel/drivers/w1/slaves/w1-therm.ko",
-	} {
-		if err := loadModule(mod); err != nil && !os.IsNotExist(err) {
-			return err
-		}
-	}
-
-	dev := "w1_bus_master1"
-	target, err := checkOneWireInterface(dev)
-	if err != nil {
-		log.Printf("Bluetooth interface %v not found.", target)
-	} else {
-		fmt.Printf("Bluetooth device %v: %v\n", dev, target)
-	}
-
-	// gokrazy should not supervise this process even when manually started.
-	os.Exit(125)
-	return nil
-}
-
-func checkOneWireInterface(device string) (string, error) {
-	name := fmt.Sprintf("/sys/bus/w1/devices/%v", device)
-	target, err := os.Readlink(name)
-	if err != nil {
-		return "", fmt.Errorf("OneWire bus master %v not found", device)
-	}
-	return target, nil
-}
-
-func loadModule(mod string) error {
-	f, err := os.Open(filepath.Join("/lib/modules", release, mod))
-	if err != nil {
-		return err
-	}
-	defer f.Close()
-
-	if err := unix.FinitModule(int(f.Fd()), "", 0); err != nil {
-		if err != unix.EEXIST &&
-			err != unix.EBUSY &&
-			err != unix.ENODEV &&
-			err != unix.ENOENT {
-			return fmt.Errorf("FinitModule(%v): %v", mod, err)
-		}
-	}
-	modname := strings.TrimSuffix(filepath.Base(mod), ".ko")
-	log.Printf("modprobe %v", modname)
-	return nil
-}
-
-var release = func() string {
-	var uts unix.Utsname
-	if err := unix.Uname(&uts); err != nil {
-		fmt.Fprintf(os.Stderr, "minitrd: %v\n", err)
-		os.Exit(1)
-	}
-	return string(uts.Release[:bytes.IndexByte(uts.Release[:], 0)])
-}()
-
-func main() {
-	if err := logic(); err != nil {
-		log.Fatal(err)
-	}
-}

internal/configuration/fermentord.toml

@@ -23,9 +23,9 @@ tilt = "DWJONDAHL.ingest.fermentor.ingest_tilt_reading"
 port = 8000
 
 [sensors]
-wort = "28-021892458c02"
-chamber = "28-02319245083c"
-ambient = "28-02319245022b"
+wort = ""
+chamber = ""
+ambient = ""
 weight = 0.8
 
 [i2c]

pkg/temperature/ds18b20.go

@@ -6,6 +6,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"io/ioutil"
 	"log"
 	"os"
 	"path/filepath"
@@ -224,7 +225,7 @@ func triggerBulkRead() error {
 }
 
 func pollBusState() (BulkReadBusState, error) {
-	b, err := os.ReadFile("/sys/bus/w1/devices/w1_bus_master1/therm_bulk_read")
+	b, err := ioutil.ReadFile("/sys/bus/w1/devices/w1_bus_master1/therm_bulk_read")
 	if err != nil {
 		return BulkReadIdle, err
 	}
@@ -240,7 +241,7 @@ func pollBusState() (BulkReadBusState, error) {
 // read returns the temperature of the specified sensor in millidegrees celcius.
 func read(sensor string) (int64, error) {
 	path := filepath.Join("/sys/bus/w1/devices", sensor, "w1_slave")
-	data, err := os.ReadFile(path)
+	data, err := ioutil.ReadFile(path)
 	if err != nil {
 		return NaN, err
 	}