solar-toolkit/main.go

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package main
import (
"context"
"encoding/json"
"flag"
"log"
"net"
"os"
"time"
2022-07-13 17:01:08 +00:00
"git.netflux.io/rob/solar-toolkit/inverter"
)
const commandTimeout = time.Second * 5
func main() {
var ipAddr string
flag.StringVar(&ipAddr, "ipaddr", "", "IP address/port")
flag.Parse()
if ipAddr == "" {
flag.Usage()
os.Exit(1)
}
arg := flag.Arg(0)
if arg != "discover" && arg != "runtime" && arg != "info" {
log.Fatal("missing command: [discover|runtime|info]")
}
ctx, cancel := context.WithTimeout(context.Background(), commandTimeout)
defer cancel()
conn, err := net.Dial("udp", ipAddr)
if err != nil {
log.Fatalf("error dialing: %s", err)
}
defer conn.Close()
var (
inverter inverter.ET
output any
)
switch arg {
case "discover":
log.Fatal("not yet implemented")
case "info":
output, err = inverter.DeviceInfo(ctx, conn)
if err != nil {
log.Fatalf("error getting device info: %s", err)
}
case "runtime":
output, err = inverter.RuntimeData(ctx, conn)
if err != nil {
log.Fatalf("error getting runtime data: %s", err)
}
}
json, err := json.Marshal(output)
if err != nil {
log.Fatalf("error encoding JSON: %s", err)
}
if _, err = os.Stdout.Write(json); err != nil {
log.Fatalf("error writing to stdout: %s", err)
}
}