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Didier,<br>
<br>
you may need to send a periodic "tester present" signal after
entering the diagnostic session via "10 03".<br>
<br>
Depending on the vehicle, the diag session automatically terminates
within 60 seconds or less, if the tester presence isn't signalled.<br>
<br>
The RE toolkit contains a tester presence tool:<br>
<br>
<font face="monospace">OVMS# re obdii tester ?<br>
Usage: re obdii tester list|start|stop|stopall<br>
list List current tester present signals<br>
start Start sending a tester present signal to an
ECU<br>
stop Stop tester present for an ECU<br>
stopall Stop tester present for all ECUs<br>
</font><br>
This normally isn't needed if you send the commands directly in
series.<br>
<br>
If you can exclude that issue, I'd say you've got an error in the
key calculation.<br>
<br>
Regards,<br>
Michael<br>
<br>
<br>
<div class="moz-cite-prefix">Am 28.09.24 um 22:54 schrieb didier---
via OvmsDev:<br>
</div>
<blockquote type="cite"
cite="mid:1059624650.13849918.1727556874007@mail.yahoo.com">
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<div dir="ltr" data-setdir="false">Hi,</div>
<div dir="ltr" data-setdir="false"><br>
</div>
<div dir="ltr" data-setdir="false">I need to put a ECU into diag
mode and access private data in a secured session.</div>
<div dir="ltr" data-setdir="false">I am supposed to send "10
03", then "27 03", receive a seed, and send the private key
with "27 04".</div>
<div dir="ltr" data-setdir="false">This is working fine with the
terminal in CarScanner mobile app connected to a BT dongle,
but when I try to use the OVMS box, the "10 03" is ok, but "27
03" return a <span>
<pre>serviceNotSupportedInActiveSession</pre>
</span>error. It is possible to start a secured / private
session with the OVMS box ?</div>
<div dir="ltr" data-setdir="false"><br>
</div>
<div dir="ltr" data-setdir="false">Didier<br>
</div>
</div>
<br>
<fieldset class="moz-mime-attachment-header"></fieldset>
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</blockquote>
<br>
<pre class="moz-signature" cols="72">--
Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
Fon 02333 / 833 5735 * Handy 0176 / 206 989 26</pre>
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