Dear Clarke, dear George,
many thanks for your quick responses.
I'm working in a project with the company BSC which is pushing the
EnOcean spec.
We are preparing some hardware and a gateway for the interop meeting
next week.
I really like the R Pi example. I started some time ago with Rami's
example "IoTivity Development on Raspberry Pi* 3"
I think we will start a server providing ONE device with one to several
resources representing a single EnOcean sensors.
What do you think?
One more question - hopefully I will not bother ;-) - since I have been
not involved in the iotivity lite topic for a longer time.
At the beginning of the security stuff there were cbor files stored
holding the credentials.
Nowadays there are commands like
oc_storage_config("./devicebuilderserver_creds");
oc_storage_config("./devicebuilderserver_creds");
But it seems that e.g. ./devicebuilderserver_credsis displayed as a
folder not a file.
Maybe there is a trick behind that ...
@George:
I just tried the multi_device_server_linux.c
The OTGC app displays two devices - unfortunately with the same name "My
fridge"
Having onboarded the first device an onboarding of the second device failed.
Was that example tested with the OTGC app and security?
In general there might be the question:
If a server application provides two or more devices: then it can only
manage ONE credential folder / file ? Is that the design goal?
Best regards,
Diethelm
Am 03.12.2019 um 20:53 schrieb Clarke Stevens:
Diethelm,
From your example, I think you may just be building a basic OCF device
with multiple resources (resources in OCF are fairly atomic and
devices contain multiple resources). You might want to look at the
Raspberry Pi examples here that have multiple resources on daughter
boards. I particularly like the Explorer Hat Pro example because it
has both sensors and actuators and there is a nice tutorial
(enclosed). Also, the EnOcean bridge specification should be available
soon. In the mean time, you can see what a bridge looks like with
several other protocols (ZigBee, Z-Wave, U+, oneM2M, AllJoyn and
Bluetooth).
https://github.com/openconnectivity/Sample-Raspberry-Pi-Code
If you actually do need a Device to contain other devices, you can do
that, but it is not as simple.
Thanks,
-Clarke
On Dec 3, 2019, at 12:11 PM, Prof. Dr.-Ing. Diethelm Bienhaus
<diethelm.bienh...@mni.thm.de <mailto:diethelm.bienh...@mni.thm.de>>
wrote:
Hi all,
we are building a gateway for EnOcean sensors. The goal is to have a
device for each physical device like a button or a sensor.
There are EnOcean sensors with e.g. three measurement points like
combined temperature / illuminance / presence.
So we want to provide several devices (with one to n resources) from
our gateway application.
In old days (IoTivity) it was possible to have one server (in one
surrounding application) that starts several devices. Is that
possible with IoTivity lite too?
If so: could some one send me e.g. a link to an example?
Many thanks in advance.
Best regards,
Diethelm
-------- Weitergeleitete Nachricht --------
Betreff: RE: IoTivity lite question
Datum: Tue, 3 Dec 2019 18:49:40 +0000
Von: Rami Alshafi<ralsh...@vtmgroup.com> <mailto:ralsh...@vtmgroup.com>
An: Prof. Dr.-Ing. Diethelm Bienhaus<diethelm.bienh...@mni.thm.de>
<mailto:diethelm.bienh...@mni.thm.de>
Hi,
Yes, I believe it is possible to be accomplished with IoTivity-lite.
I do not know for sure but no one complained about it being an issue
at all and I work with many developers.
Your best bet is to send out your question to the IoTivity developer
mailing list (iotivity-dev@lists.iotivity.org
<mailto:iotivity-dev@lists.iotivity.org>) and one of the developers
will likely respond. The holidays in the US are coming up so maybe
responses will be slower.
Thanks,
-Rami
*From:*Prof. Dr.-Ing. Diethelm Bienhaus
[mailto:diethelm.bienh...@mni.thm.de]
*Sent:*Tuesday, December 3, 2019 8:17 AM
*To:*Rami Alshafi<ralsh...@vtmgroup.com> <mailto:ralsh...@vtmgroup.com>
*Subject:*IoTivity lite question
Hi Rami,
hopefully you can help us (or push forward our problem):
Using the nice development process (gen.sh -> build.sh -> run.sh) we
could generate a server with the desired resources.
OCF Server name : "server_lite_5821"
Intialize Secure Resources
Register Resource with local path "/humidity"
number of Resource Types: 1
Resource Type: "oic.r.humidity"
Default OCF Interface: "oic.if.a"
Register Resource with local path "/keycardswitch"
number of Resource Types: 1
Resource Type: "oic.r.keycardswitch"
Default OCF Interface: "oic.if.a"
Register Resource with local path "/rockerbutton"
number of Resource Types: 1
Resource Type: "oic.r.button"
Default OCF Interface: "oic.if.a"
Register Resource with local path "/sensor_contact"
number of Resource Types: 1
Resource Type: "oic.r.sensor.contact"
Default OCF Interface: "oic.if.a"
Register Resource with local path "/sensor_presence"
number of Resource Types: 1
Resource Type: "oic.r.sensor.presence"
Default OCF Interface: "oic.if.a"
Register Resource with local path "/temperature"
number of Resource Types: 1
Resource Type: "oic.r.temperature"
Default OCF Interface: "oic.if.a"
Successfully installed PKI certificate
Successfully installed intermediate CA certificate
Successfully installed root certificate
OCF server "server_lite_5821" running, waiting on incoming connections.
The goal is to have a device for each physical device like a button
or a sensor.
There are EnOcean sensors with e.g. three measurement points:
Light, Temperature and Occupancy Sensor
(A5-08-XX)
Temperature value
Temp Unit (by spec
Temp Range (by TYPE spec)
Illumination value
Illumination range (by type spec)
Occupancy
oic.r.temperature
oic.r.sensor.illuminance
oic.r.sensor.presence
oic.d.sensor
Generic Sensor
So we want to provide several devices (with one to n resources) from
our gateway application.
In old days (IoTivity) it was possible to have one server (in one
surrounding application) that starts several devices. Is that
possible with IoTivity lite too?
If not: I started two servers (one and the copy of the executable
from the first). When I onboarded the first one successfully
onboarding of the second failed.
Our questions:
- is it possible to start two or more servers within one application ?
- How to organise credentials in that case (persistence, etc...)
Many thanks in advance,
Diethelm
--
----------------------------------------------------------
Prof. Dr.-Ing. Dipl.-Wirt. Ing. Diethelm Bienhaus
Fachgebiet Informatik mit Schwerpunkt Ingenieur-lnformatik
Fachbereich Mathematik, Naturwissenschaften und Informatik
Technische Hochschule Mittelhessen
Wiesenstr. 14 - D-35390 Gießen
--
----------------------------------------------------------
Prof. Dr.-Ing. Dipl.-Wirt. Ing. Diethelm Bienhaus
Fachgebiet Informatik mit Schwerpunkt Ingenieur-lnformatik
Fachbereich Mathematik, Naturwissenschaften und Informatik
Technische Hochschule Mittelhessen
Wiesenstr. 14 - D-35390 Gießen
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