88 lines
1.7 KiB
Go
88 lines
1.7 KiB
Go
package main
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import (
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"fmt"
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"github.com/tarm/serial"
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"log"
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"os"
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"path/filepath"
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"strings"
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"time"
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)
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// returns last line of output
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func sendCommand(p *serial.Port, command string) string {
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fmt.Printf("%s\n", command)
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var last_line string = ""
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p.Flush()
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_, err := p.Write([]byte(command))
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if err != nil {
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log.Fatal(err)
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}
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buf := make([]byte, 1024)
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time.Sleep(500 * time.Millisecond)
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n, _ := p.Read(buf)
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if n > 0 {
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last_line_arr := strings.Split(string(buf[:n]), "\n")
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//fmt.Printf("AAA: %+q\n", last_line_arr)
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last_line = last_line_arr[len(last_line_arr)-2]
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fmt.Print(string(buf[:n]))
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}
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return last_line
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}
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func getDevEui(p *serial.Port) string {
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var reply = sendCommand(p, "AT+ChipID=?")
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//fmt.Printf("XXX%sYYY\n",reply)
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if len(reply) >= 20 {
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return "0000" + reply[8:20]
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} else {
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return ""
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}
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}
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func readSerial(p *serial.Port) {
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p.Flush()
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buf := make([]byte, 32)
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time.Sleep(200 * time.Millisecond)
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n, _ := p.Read(buf)
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for n > 0 {
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// ignoring error as EOF raises error on Linux
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reply := string(buf[:n])
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fmt.Print(reply)
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n, _ = p.Read(buf)
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}
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}
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func main() {
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if len(os.Args) != 3 {
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fmt.Println("usage: " + filepath.Base(os.Args[0]) + " <SerialDevice> <appEui>")
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os.Exit(1)
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}
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serialdev := os.Args[1]
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appEui := os.Args[2]
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c := &serial.Config{Name: serialdev, Baud: 115200, ReadTimeout: time.Second * 1}
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s, err := serial.OpenPort(c)
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if err != nil {
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log.Fatal("Problem mit Serial Interface")
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}
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sendCommand(s, "AT+XXX")
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devEui := getDevEui(s)
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if devEui != "" {
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sendCommand(s, "AT+DevEui="+devEui)
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sendCommand(s, "AT+AppEui="+appEui)
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sendCommand(s, "AT+AppKey="+devEui+devEui)
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sendCommand(s, "AT+RESET=1")
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readSerial(s)
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} else {
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log.Fatal("Could not get devEui (that is: ChipID)")
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}
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}
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