<p>I just found <a class="issue-link js-issue-link" data-error-text="Failed to load issue title" data-id="460880047" data-permission-text="Issue title is private" data-url="https://github.com/RIOT-OS/RIOT/issues/11747" data-hovercard-type="pull_request" data-hovercard-url="/RIOT-OS/RIOT/pull/11747/hovercard" href="https://github.com/RIOT-OS/RIOT/pull/11747">#11747</a>  which seem to address at least one of your question.</p>

<p style="font-size:small;-webkit-text-size-adjust:none;color:#666;">—<br />You are receiving this because you are subscribed to this thread.<br />Reply to this email directly, <a href="https://github.com/RIOT-OS/RIOT/issues/11644?email_source=notifications&email_token=ABE7WYCG2OPAEDSYO2NU7ZTP7W52DA5CNFSM4HVBJ4K2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOD2AWJ7Q#issuecomment-511796478">view it on GitHub</a>, or <a href="https://github.com/notifications/unsubscribe-auth/ABE7WYF3NZDXRYDUDGQDNI3P7W52DANCNFSM4HVBJ4KQ">mute the thread</a>.<img src="https://github.com/notifications/beacon/ABE7WYC5NUKCNJMC6CPK4OLP7W52DA5CNFSM4HVBJ4K2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOD2AWJ7Q.gif" height="1" width="1" alt="" /></p>
<script type="application/ld+json">[
{
"@context": "http://schema.org",
"@type": "EmailMessage",
"potentialAction": {
"@type": "ViewAction",
"target": "https://github.com/RIOT-OS/RIOT/issues/11644?email_source=notifications\u0026email_token=ABE7WYCG2OPAEDSYO2NU7ZTP7W52DA5CNFSM4HVBJ4K2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOD2AWJ7Q#issuecomment-511796478",
"url": "https://github.com/RIOT-OS/RIOT/issues/11644?email_source=notifications\u0026email_token=ABE7WYCG2OPAEDSYO2NU7ZTP7W52DA5CNFSM4HVBJ4K2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOD2AWJ7Q#issuecomment-511796478",
"name": "View Issue"
},
"description": "View this Issue on GitHub",
"publisher": {
"@type": "Organization",
"name": "GitHub",
"url": "https://github.com"
}
}
]</script>