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create table t (nr) 2 as 3 select 123456789 from dual union all 4 select 987654321 from dual union all 5 select null from dual union all 6 select 1234567 from dual union all 7 select 12345678901234 from dual 8 / Tabel is aangemaakt.

SQL select nr 2 , regexp_replace(nr,'(^:digit:)(:digit:$)','\1-\2-\3') formatted_nr 3 from t 4 / NR FORMATTED_NR -------------------------------------- -------------------- 123456789 1 987654321 9 1234567 1234567 12345678901234 12345678901234 5 rijen zijn geselecteerd.


The first modification to the sketch was to average out the four temperature sensors to use as a reading. // we want to start counting temperatures temp_accumulative = 0; temp_count = 0; ... // record the value for the average calculation temp_accumulative = celsius; temp_count ; Easy enough - surely that doesn't require any explanation!

The next part was to create the variables that I would send over to my web server.

:: successfully connected to server -- request: POST /xxx/ HTTP/1.1 Host: xxx.User-Agent: Arduino/1.0 Connection: close Content-type: application/x-www-form-urlencoded Content-Length: 78 uuid=73c374f6-75d4-40ab-af37-412c575c18be&data={"temperature":25.80} -- response: HTTP/1.1 200 OK Date: Wed, GMT Server: Apache/2.4.10 (Debian) Vary: Accept-Encoding Content-Length: 105 Connection: close Content-Type: text/html; charset=UTF-8 uuid = 73c374f6-75d4-40ab-af37-412c575c18be _ts_ = 2015-11-17 data = :: done The device has been connected for almost twenty four hours now and I also put together a quick graph of the temperature which you can see below.

The minimum temperature on my alfresco in the last twenty four hours was 16.72C at in the morning - and the temperature peaked at with a whopping 21.34C.

In my case I built a generic web service that accepts a unique identifier (uuid) and data in the form of a JSON message - this lets me use my service for more than just tracking the temperature.

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