MQTT output scrambled

RE: MQTT output scrambled

Dion — Fri, 10 Feb 2023 15:38:24 GMT

I thought I did. However, after double checking, it seems like something went wrong with saving the config file... the additional config options were not in fact saved. After this quick fix, it does work. Thanks!

RE: MQTT output scrambled

Didrik Rokhaug — Fri, 10 Feb 2023 15:03:41 GMT

Did you also copy the config options from prj.conf?

RE: MQTT output scrambled

Dion — Wed, 08 Feb 2023 13:32:53 GMT

Thank you for the quick reply.

I tried the project you sent and it works fine on its own, every variation prints the number.

However, when I copy/paste the lines of code into the main section of 'Cellular IoT fundamentals - Lesson 4', the following error happens:

*** Booting Zephyr OS build v3.2.99-ncs1 ***

Hello World! thingy91_nrf9160

printk: 46.692345

printf:

* buffer overflow detected *

[00:00:01.510,894]

[1;31m<err> os: r0/a1:  0x00000003  r1/a2:  0x00000000  r2/a3:  0x00000001

[0m

[00:00:01.510,925]

[1;31m<err> os: r3/a4:  0x2000fcb8 r12/ip:  0x0000000a r14/lr:  0x0001f451

[0m

[00:00:01.510,955]

[1;31m<err> os:  xpsr:  0x61000000

[0m

[00:00:01.510,955]

[1;31m<err> os: Faulting instruction address (r15/pc): 0x0001d1f6

[0m

[00:00:01.510,986]

[1;31m<err> os: >>> ZEPHYR FATAL ERROR 3: Kernel oops on CPU 0

[0m

[00:00:01.511,016]

[1;31m<err> os: Current thread: 0x2000cf08 (unknown)

[0m

[00:00:01.555,664]

[1;31m<err> fatal_error: Resetting system

[0m

Alternatively, I tried placing it in the function that only activates when the button is pushed. This is also where I had placed my 'acc' variable initially. Then it only returns empty values after the second line:

Hello World! thingy91_nrf9160

printk: 46.692345

printf:

printk sprintf:

printf sprintf:

the string is:

RE: MQTT output scrambled

Didrik Rokhaug — Wed, 08 Feb 2023 12:41:10 GMT

Hi,

Have you tried to print acc on the device as well, to see if it is encoded correctly on the device?

It might be that your application haven't enabled support for floats in the string library. Please see the attached project for how you can enable support for floats and doubles in strings.

devzone.nordicsemi.com/.../3323.hello_5F00_float.zip

Best regards,

Didrik