Watch a databin for new entries?

Questions
1

In his Data Drop announcement post Stephen Wolfram writes:

You don’t have to make a report. Instead, you can just have a Wolfram Language program that watches a databin, then for example sends out alerts—or takes some other action—if whatever combination of conditions you specify occur.

How exactly does one do that? I’d like to send an email whenever a new databin entry is added, but after hours of googling I cannot find anything related to any such functionality.

I thought I came close when I found out about Channel-Based Communication, but the instructions there work “the other way around”, i.e. pushing a message into a databin when the channel receives one – not pushing a message into a channel when the databin receives one.

2

Dear Ville,

This is a simple demo on how this can be done.

I’ve set up the following wolfram language script and left it running in a raspberryPi.

CloudConnect["user@domain.com","password"]; 
db=Databin["databinID"];
count=db["EntryCount"]; 
latestCount=count;
While[
    FindFile["quit.txt"]==$Failed, 	
    latestCount=db["EntryCount"];
    If[latestCount>count, SendMail["Record added in DataBin @"<>DateString@Now];
    count=latestCount;];
    Pause[10];]
    DeleteFile["quit.txt"]

You could use other methods to interrupt the process that we’ll trigger in the raspberry Pi instead of checking for the file. Try out the new Channel-Comm to play with this.

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From my computer I added a record in the databin

DatabinAdd[db, 666];

The script detected the increase in recordcount of the bin and send me a message back to my registered email address.

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