Sending the message which includes ctrl-z(0x1A) character over uart

RE: Sending the message which includes ctrl-z(0x1A) character over uart

zester926 — Wed, 29 Jan 2020 09:56:44 GMT

Hi Simon!

The problem is solved when I changed the publishing function with this code.

void publish_mqtt(uint8_t * data)
{
    uint8_t msg[] = "AT+QMTPUB=0,1,1,0,\"topic\"\r";

    at_send(msg, sizeof(msg));
    nrf_delay_ms(1000);

    at_send(data, strlen(data));
    app_uart_put(0x1A);
    app_uart_put('\r');
}

I think the problem is something with strcpy().

Anyway, Thank you!

RE: Sending the message which includes ctrl-z(0x1A) character over uart

zester926 — Wed, 29 Jan 2020 07:17:00 GMT

Hi Simon!

I tested again. and I found that AT+QMTPUB(publishing command) is the only command which doesn't work.

Like below code, I sent AT+QCDS after AT+QMTPUB.

    lte_check(); // AT+QCDS
    lte_setup(); // AT+QMTCFG, AT+QSSLCFG, AT+QMTOPEN, AT+QMTCONN
    publish_mqtt("Hellow CEEDUP\r"); // AT+QMTPUB
    lte_check(); // AT+QCDS

but, As you can see below image, Only AT+QMTPUB command didn't work and, AT+QCDS command was able to confirm that it worked very well. Red box is the space where AT+QMTPUB is should printed.

RE: Sending the message which includes ctrl-z(0x1A) character over uart

zester926 — Tue, 28 Jan 2020 09:29:12 GMT

At segger, When I publish the message with below function, AWS doesn't receive any message.

but, other functions works well, and I can get the response very well(except of the publish function).

after these setup functions are done at the segger, I sent only the publish command with QCOM once again.

In this case, AWS can receive the message.

[QCOM]

[AWS]

and the RTT show me the response from the LM5 via UART.

[RTT]

So, only the publish function doesn't work at the segger. What would be the problem?

RE: Sending the message which includes ctrl-z(0x1A) character over uart

zester926 — Tue, 28 Jan 2020 04:10:14 GMT

And the main problem is I cant send hex character and cant get ">" this response.

RE: Sending the message which includes ctrl-z(0x1A) character over uart

zester926 — Mon, 27 Jan 2020 16:22:21 GMT

Hi Simon!

Well that is my ticket and at that time it works well, but now It doesn't work. Can u provide more help about thos problem?

Thank you.

RE: Sending the message which includes ctrl-z(0x1A) character over uart

Simon — Mon, 27 Jan 2020 16:09:46 GMT

Take a look at this ticket, which I think is relevant to yours since the same modem is used. If it doesn't help you, please tell me and I will take a closer look at your issue.

Best regards,

Simon