Always returns [65]

[5k3105]

on windows 7.
Using Termite:
Port: COM1
Baud rate: 115200
Data bits: 8
Stop bits: 1
Parity: none
Flow control: none

• Append LF

TEMPS?
AC/DC Temperature 1 = 56 C
AC/DC Temperature 2 = 51 C
Control Brd Temp = 39 C
DC/AC Temperature = 39 C
DC2 Temperature = 55.18 C
DC2 Temperature 2 = 51.18 C
Battery Temperature = 29.8 C

Code below gives [65] though:

λ telem_serial.exe
2017/10/24 23:47:58 %q[65 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0]
buf len:  1

package main

import (
	"github.com/tarm/serial"
	"log"
)

func main() {
	c := &serial.Config{Name: "COM1", Baud: 115200}
	s, err := serial.OpenPort(c)
	if err != nil {
		log.Fatal(err)
	}

	err = s.Flush()
	if err != nil {
		log.Fatal(err)
	}

	cmd := []byte("TEMPS?\r\n")
	n, err := s.Write(cmd)
	if err != nil {
		log.Fatal(err)
	}

	buf := make([]byte, 128)
	n, err = s.Read(buf)
	if err != nil {
		log.Fatal(err)
	}
	log.Print("%q", buf) //buf[:n])
	println("buf len: ", n)
}

[5k3105]

Actually, if I send it a different command, it gives me the first letter of the response. So it is returning correct data, just only one byte of it.

Any ideas?

[5k3105]

Got same issue using github.com/knieriem/serport however, https://github.com/jacobsa/go-serial worked correctly.