[riot-notifications] [RIOT-OS/RIOT] tests/pkg_semtech_loramac: fix get command with EUI values (#8633)

Alexandre Abadie notifications at github.com
Sat Feb 24 11:14:33 CET 2018

- add a null character after conversion from bytes to hex chars
- set the maximum print buffer size to the maximum possible size (application key size)

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### Contribution description

This PR fixes the output of the `loramac set` command in the `pkg_semtech-loramac` test application. I
just realized that no string terminating character is added to the buffer used to store the string of hex chars. And thus, calling the `get` command with `appkey` (16 bytes, 32 hex chars) before `deveui` (8 bytes, 16 hex chars) was working for the former but not for the latter: chars from the previous command still being in the converted chars buffer.

This PR also set the maximum size of the print buffer to the maximum number of characters expected: the keys (application, application session and network session keys) are 16 bytes long (32 hex chars) so now it's 33 bytes long.

Tested and works now.

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-- Commit Summary --

  * tests/pkg_semtech_loramac: fix get command for EUIs

-- File Changes --

    M tests/pkg_semtech-loramac/main.c (10)

-- Patch Links --


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