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Peripherical problems for cc253x.

Bjorn Lindstrom
Prodigy 10 points

Other Parts Discussed in Thread: SIMPLICITI

Abit of a newbie, it's 6 years since I study electronics and havn't been working with it since then. neigther been practicing english, sorry.

But at the moment I'm about to start a project with sensors using ZigBee communication.

The idea is to read temprature, humidity and airpressure to start with in every module in order to control a climatesystem for a house.
Temp.range (-50)-40 to +85(+125) degree C. (secundary)primary. Testhouse had a peak at -38,4 C this winter.

So I have some questions:

1. Is cc253x overkill to read some sensors and send the values to a server?

2. Best way to connect a capacitiv humidity sensor? At the moment the choice is a SMTHS07 from Smartec since TI doesn't seams to have any sensors at all (except temp).
 A. dubble 555 astable multivibrator for analog signal and then ad-converter
   AA. Parallell or serial A/D
      AAA. How many bits suites best for cc253x?
Any other ideas?

3. Schematics for connecting a JTAG-bus or is it nessecary with the cc253x?

The primary is too keep it to a low cost. aprox 15 messurepoints for regular (temp, hum and airpressure) modules and 7-8 high priority (humidity for waterleakage, smoke for fire and temp for freezing the pipes)

Feel free to comment, drop constructiv ideas and reflections.

  • 0
    TI__Guru*** 130875 points

    Hi Bjorn,

    For and independent 15 point sensor network, you may find SimpliciTI works just as well depending on the range and setup you require.  For example, SimpliciTI can not do a mesh network if this is something you truely need.

    I would have a look

    http://focus.ti.com/docs/toolsw/folders/print/simpliciti.html

    In general the radios are so far all lower datarate (up to 500kbps ... for Zigbee radios and more typical use 250kbps). 

    However the SoCs will have an ADC.   With the exception of the CC430 family, all of our SoCs use a proprietary debug protocol and not JTAG.

    I hope this helps as a start with some further info.

    Cheers,

    Yoda