[EMS Discuss] Sensors reporting via cell phone (AKA networking my dog/car) (?Bluetooth maybe?)

Julie Baumler EMAIL HIDDEN
Wed Mar 27 17:02:47 PDT 2013

On Wed, Mar 27, 2013 at 4:46 PM, Benjamin Hallert <EMAIL HIDDEN> wrote:
> You can often connect to a phone and send text messages using AT commands
> over serial.

Ohhh, that would be ideal for me. I wore out the T key on my first Mac
laptop sending AT commands over serial to various devices...

I currently have a Samsung S125Z
http://www.samsung.com/us/mobile/cell-phones/SGH-S125ZSATFN - I've
already got the case duct-taped together, I should see if there is
serial access internally (This is my backup 2nd network emergency
phone, as long as it works, it could be totally hacked together.)

The $20 phone is an LG800G

> If physical serial access isn't available on the phone then you might be
> able to pair to it with Bluetooth and send the commands via that.  What
> model of TracFone exactly?  Might be able to see what AT commands are
> available for things like sending SMS.

How would I find things like that? Looking for 'datasheet' and
'manual' has not been fruitful.


>> Sent from Mailbox for iPhone
> On Wed, Mar 27, 2013 at 4:41 PM, Julie Baumler <EMAIL HIDDEN> wrote:
>> Hi everyone -
>> Since my dog likes to hang out in my car, I want to set up a
>> temperature and water sensor in my car that reports over a cellular
>> network when the temperature reaches certain thresholds or the water
>> sensor shows no water, and possibly can be triggered from the network
>> to report temperature and water status. I may wish to add additional
>> sensors later.
>> The actual sensors and having them trigger 'something' using an
>> arduino are easy, but I'm not sure what the best way to get from there
>> to having a cell phone do something - and what features the phone
>> needs to have to support this. I know I could do it with an Android
>> phone, but I want to use a throw away phone that's clearly not worth
>> stealing. Is Bluetooth support enough to do what I want if I use it to
>> trigger SMS (and vice-versa)? I need to throw some money at TracFone
>> in the next week to keep my backup/emergency service going, and one
>> way to do that is to purchase a new phone from them. Their $20 phone
>> with Bluetooth has Version 2.1 + EDR (Enhanced Data Rate) with the
>> hands-free, headset, object push, and object exchange profiles. Is
>> that sufficient? Or what is the minimal hardware profile I need?
>> Thanks,
>> Julie
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