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  • Case ID: 332606
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Migrating MQTT Sample to a Custom Board

RodWatt

Hi,

I have successfully built and ran the MQTT sample (/opt/nordic/ncs/v2.7.0/nrf/samples/net/mqtt) on the nRF9160-DK. I did have a few problems with SIM coverage and firmware versions which was sorted in this ticket.

 MQTT Sample Not Connecting on nRF9160 Board 

I would now like to move this code onto my own board.

When I run this code on my own board, I see this error.

*** Booting nRF Connect SDK v2.7.0-5cb85570ca43 ***
*** Using Zephyr OS v3.6.99-100befc70c74 ***
[00:00:00.431,610] <inf> network: Bringing network interface up and connecting to the network
[00:00:00.658,813] <inf> nrf_modem_lib_trace: Trace thread ready
[00:00:00.666,107] <inf> nrf_modem_lib_trace: Trace level override: 2
[00:00:00.667,724] <err> lte_lc: Could not send AT command, error: 65536
[00:00:00.667,755] <err> lte_lc: Failed to set system mode and mode preference, err -14
+CEREG: 2
+CEREG: 4
+CEREG: 2,"B984","00542616",9
+CSCON: 1
+CEREG: 2,"B984","00542616",9,0,11
+CSCON: 0
 

My overlay file is shown below.

&pinctrl {
        uart0_default: uart0_default {
                group1 {
                        psels = <NRF_PSEL(UART_TX, 0, 6)>, <NRF_PSEL(UART_RX, 0, 7)>;
                };
        };

        uart0_sleep: uart0_sleep {
                group1 {
                        psels = <NRF_PSEL(UART_TX, 0, 6)>, <NRF_PSEL(UART_RX, 0, 7)>;
                        low-power-enable;
                };
        };
};

&uart0 {
        status = "okay";
        current-speed = < 115200 >;
        /delete-property/ rts-pin;
        /delete-property/ cts-pin;
};

/* Enable uart1 for tracing. */

&uart1 {
   status = "okay";
   current-speed = <1000000>;
   pinctrl-0 = <&uart1_default>;
   pinctrl-1 = <&uart1_sleep>;
   pinctrl-names = "default", "sleep";
};

/ {
   chosen {
      nordic,modem-trace-uart = &uart1;
   };
};

I use UART0 for my serial terminal.

Would appreciate your pointers on this,

Thanks,

Rod 

Parents
  • 0

    Hi Rod,

    Did you manage to collect a modem trace through either uart1 or RTT terminal?

    I see you also play with link monitor before. If this is a new custom board, are you able to see it can successfully connect with network when you check with link monitor after programming Serial LTE modem (nordicsemi.com)?

    Best regards,

    Charlie

  • 0 in reply to Charlie

    Hi Charlie,

    No, I didn't manage to get the trace to work.

    I tried the serial LTE example,

    / {
	chosen {
		ncs,slm-uart = &uart1;
	};
};

&uart0 {
	status = "okay";
	hw-flow-control;
};

&uart1 {
	compatible = "nordic,nrf-uarte";
	current-speed = <115200>;
	status = "okay";

	pinctrl-0 = <&uart1_default_alt>;
	pinctrl-1 = <&uart1_sleep_alt>;
	pinctrl-names = "default", "sleep";
};



&i2c2 {
	status = "disabled";
};

&pinctrl {
	uart1_default_alt: uart1_default_alt {
		group1 {
			psels = <NRF_PSEL(UART_RX, 0, 7)>;
			bias-pull-up;
		};
		group2 {
			psels = <NRF_PSEL(UART_TX, 0, 6)>;
		};
	};

	uart1_sleep_alt: uart1_sleep_alt {
		group1 {
			psels = <NRF_PSEL(UART_TX, 0, 6)>,
				<NRF_PSEL(UART_RX, 0, 7)>;
			low-power-enable;
		};
	};
};

    I am using my own overlay file, above to redirect the serial. terminal.

    Im getting this as an output

    All pins have been configured as non-secure
[Sec Thread] Secure image initializing!
TF-M Float ABI: Hard
Lazy stacking enabled
Booting TF-M v2.0.0-ncs2
Ready

    Rod

Reply
  • 0 in reply to Charlie

    Hi Charlie,

    No, I didn't manage to get the trace to work.

    I tried the serial LTE example,

    / {
	chosen {
		ncs,slm-uart = &uart1;
	};
};

&uart0 {
	status = "okay";
	hw-flow-control;
};

&uart1 {
	compatible = "nordic,nrf-uarte";
	current-speed = <115200>;
	status = "okay";

	pinctrl-0 = <&uart1_default_alt>;
	pinctrl-1 = <&uart1_sleep_alt>;
	pinctrl-names = "default", "sleep";
};



&i2c2 {
	status = "disabled";
};

&pinctrl {
	uart1_default_alt: uart1_default_alt {
		group1 {
			psels = <NRF_PSEL(UART_RX, 0, 7)>;
			bias-pull-up;
		};
		group2 {
			psels = <NRF_PSEL(UART_TX, 0, 6)>;
		};
	};

	uart1_sleep_alt: uart1_sleep_alt {
		group1 {
			psels = <NRF_PSEL(UART_TX, 0, 6)>,
				<NRF_PSEL(UART_RX, 0, 7)>;
			low-power-enable;
		};
	};
};

    I am using my own overlay file, above to redirect the serial. terminal.

    Im getting this as an output

    All pins have been configured as non-secure
[Sec Thread] Secure image initializing!
TF-M Float ABI: Hard
Lazy stacking enabled
Booting TF-M v2.0.0-ncs2
Ready

    Rod

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