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Cannot send SMS with over 255 chars.

See original GitHub issue

Hi, I got an issue sending SMS when I send an SMS with 280 chars. Is it possible to send message over 255 chars, If yes, Please help me how to fix it or show me what did I do wrong. Thank sa lot.

Here is my code to submit_sm: session.submit_sm({ source_addr: 'TEST', destination_addr: number, short_message: message }, function(pdu) { if (pdu.command_status == 0) { console.log("- submit_sm success",pdu.message_id); session.close(); } else{ console.log("- submit_sm fail:", pdu); session.close(); } });

Issue Analytics

State:
Created 7 years ago
Comments:11

Top GitHub Comments

1reaction

notgiorgicommented, Dec 16, 2016

@Sukhrob I tried, It didn’t work. I think it’s provider’s problem.

I solved problem using this answer: https://github.com/farhadi/node-smpp/issues/4#issuecomment-150810079

    calculateMessageUHD(sms) {
        const info = gsm(sms)
        const cref = this.concat_ref
        return info.parts.map((part, i) => {
            
            let udh = new Buffer(6)
            udh.write(String.fromCharCode(0x5), 0) //Length of UDF
            udh.write(String.fromCharCode(0x0), 1) //Indicator for concatenated message
            udh.write(String.fromCharCode(0x3), 2) //  Subheader Length ( 3 bytes)
            udh.write(String.fromCharCode(cref), 3) //Same reference for all concatenated messages
            udh.write(String.fromCharCode(info.sms_count), 4) //Number of total messages in the concatenation
            udh.write(String.fromCharCode(i + 1), 5) //Sequence number ( used by the mobile to concatenate the split messages)

            return {
                udh: udh,
                message: part,
            }
        })
    }

then while sending submit_sm:

short_message: {
        udh: part.udh,
        message: part.message,
},

1reaction

sukhrobkhakimovcommented, Dec 2, 2016

@habaongoc Are you testing with GSM or CDMA operator? If it is GSM, then use “message_payload” instead of “short_message”. If it is CDMA, you must send multiple messages. Please, refer to this link https://github.com/farhadi/node-smpp/issues/4