func (m *GSMModem) SendLongPduSms(mobile string, message string) string {
mes := []rune(message)
numberOfMessages := len(mes) / 67
if len(mes)%67 > 0 {
numberOfMessages++
}
log.Debug("Total messages", numberOfMessages, "length:", len(message))
udh := createUDH(numberOfMessages)
encodedPhoneNumber := encodePhoneNumber(mobile)
phoneLength := fmt.Sprintf("%02X", len(mobile))
var status string
for i := 0; i < numberOfMessages; i++ {
status = m.SendCommand("AT+CMGF=0\r", false)
log.Debug(status)
telNumber := "41" + getNextTpmr() + phoneLength + "91" + encodedPhoneNumber
startByte := i * 67
stopByte := (i + 1) * 67
if stopByte >= len(mes) {
stopByte = len(mes) - 1
}
text := string(mes[startByte:stopByte])
log.Debug(startByte, stopByte, text)
encodedText := pdu.EncodeUcs2ToString(text)
textLen := lenInHex(udh[i] + encodedText)
text = telNumber + "0008" + textLen + udh[i] + encodedText
status = m.SendCommand("AT+CMGS="+strconv.Itoa(lenInBytes(text))+"\r", false)
log.Debug(status)
text = "00" + text
status = m.SendCommand(text+string(26), true)
log.Debug(status)
}
return status
}
func (m *GSMModem) SendPduSMS(mobile string, message string) string {
log.Info("SendPduSMS ", mobile, message)
if len([]rune(message)) > 70 {
log.Info("This is long message. Will split")
return m.SendLongPduSms(mobile, message)
}
// Put Modem in SMS Binary Mode
status := m.SendCommand("AT+CMGF=0\r", false)
telNumber := "01" + "00" + fmt.Sprintf("%02X", len(mobile)) + "91" + encodePhoneNumber(mobile)
encodedText := pdu.EncodeUcs2ToString(message)
textLen := lenInHex(encodedText)
text := telNumber + "0008" + textLen + encodedText
status = m.SendCommand("AT+CMGS="+strconv.Itoa(lenInBytes(text))+"\r", false)
text = "00" + text
// EOM CTRL-Z = 26
status = m.SendCommand(text+string(26), true)
return status
}