• State TI Thinks Resolved
  • Locked Locked
  • Replies 6 replies
  • Answers 1 answer
  • Subscribers 54 subscribers
  • Views 1366 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Original question:

Important enhancements for CC1310 family of devices and Datasheet/Errata Updates

RTOS/CC1310: Long range mode for CC1310

Mobashir Mohammad
Expert 1005 points
Part Number: CC1310

Tool/software: TI-RTOS

Hi,

This is regarding SmartRF Setting for Long Range communication using CC1310 Launchpad. I tested out with the 625bps legacy and the 2.5 simple link mode. Both gave similar range performance. In a dense non-LOS urban setting I was able to reach up to 300m and with up to 800m in clearer environment. I have the following question regarding the range improvement.

1. What is the difference between the two settings and which one is recommended?

2. I understand that lower data rate can provide longer communication range. What is the lowest supported data rate for CC1310?

3. How can I modify the 625bps or the 2.5kbps setting from the SmartRF setting to support even lower data rates. Something like 100bps of Sigfox, etc for increased range.

4. Is there some recommended SmartRF setting file that I can use for observing the longest possible range that the community here has tried?

Thanks for providing such an active forum.

BR,

MM

  • 0
    TI__Mastermind 36395 points
    Mobashir,

    We recommend not using the original long range mode, however we still include it in our tools for backwards compatibility. The main issue with the old long range mode is that we found it was very sensitive to frequency error between TX and RX. The tolerance was less than 5ppm and we only have 20ppm XTALs on our development kits.

    From surveying the customer use-cases it was also found that 625bps was actually too slow, so therefore it was decided to try again at a higher data rate of 2.5kbps and 5.0kbps and aim for a better frequency error tolerance.

    I recommend staying with the 2.5kbps as this is our main path of development going forward.

    Regards,
    /TA
  • 0 in reply to TA12012
    Expert 1005 points
    Thanks TA,

    Much appreciate your feedback. I would stick to the 2.5kbps approach then. Further to my question, what should I do to improve the communication range for that setting. Is there a way to reduce the data rate further to extend it?

    I see quite a few parameters that SmartRF Studio allows us to change, including RX Filter BW, Deviation, Whitening, and Symbol rate to name a few. What would be the best setting especially to achieve the longest range.

    Also, during export, the current smart settings exports the RF_cmdPropTx and RF_cmdPropRx structures. Is there a way to export other structures like CMD_PROP_TX_ADV, etc.

    Thanks again,
    MM
  • 0 in reply to Mobashir Mohammad
    TI__Mastermind 36395 points
    Mobashir,

    Actually, one of the biggest items you can to increase the range is a better RF design. We have found that the range of the CC1310 LP is actually not as good as it could have been. Specifically the 2x3 jumper pins on either side of the antenna is a bad idea and caused the range to be reduced.

    The quickest option would be to get the CC1312 Launchpad instead, you will see almost 2x range.

    Regards,
    /TA
  • 0 in reply to TA12012
    Expert 1005 points
    Thanks again TA,

    Most certainly I'd try out the new Launchpad. Since I have already purchased quite a few of CC1310, it would be great if there was a software setting to try to improve the range. Would increasing the spread factor to 8 for the 2.5kbps setting show any improvement?

    Any suggestion on modifying those settings would be of great help.

    Best,
    MM
  • 0 in reply to Mobashir Mohammad
    TI__Guru**** 317180 points
    What range (LOS) do you need?
  • 0 in reply to Mobashir Mohammad
    TI__Mastermind 36395 points
    Mobashir,

    You could use an external antenna (good one), this will give you longer range.

    Regards,
    /TA