I have a question about err = modem.sendsbdtext();

char a = "hi, hi, hi\r\n my,my,my

err = modem.sendsbdtext(a);

When you do Iridium satellite communication by sbdsend in the code above,i can only receive the first line above.

The above is a simple example, and to be exact, I want to call up the csv file stored on the sd card and save it in variable a and see it on my computer using Iridium satellite communication, but I can't receive the first line whenever I communicate. Can't we get an entry from iridium communication? Or I'd appreciate it if you could give me an answer.

Do you think that it might help if we had more details of what you are doing ?

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Thanks in advance for your cooperation.