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CC1312R: The issue of communication distance and packet loss rate

faker wang
Intellectual 436 points
Part Number: CC1312R
Other Parts Discussed in Thread: SYSCONFIG, CC1310

Hi guys:

I used the cc1312 15.4 protocol stack. Previously, I used cc1310, but the flash and RAM were not sufficient to support our business. Therefore, we recommended cc1312 based on the ti official website. However, in the sysconfig of 1312, 433MHz communication cannot be selected (the hardware has already adapted to 433mHz)
So I used the configuration of LP-CC1352P7-4 with 433Mhz and added its configuration files ti_154stack_config. h, ti_radio.config. c, and ti_radio.config. h to my 1312 project. Currently, the tested communication distance is as follows:
1. The communication distance in a complex environment of a 5kbps underground garage is about 400 meters
2. The communication distance in a complex environment of a 50kbps underground garage is about 100 meters
My question is:
In the 433 configuration of LP-CC1352P7-4, txpower can only be configured to 13dbm and cannot reach the 15dbm of cc1310. So, when I use the configuration of LP-CC1352P7-4, can I not achieve the maximum communication distance of 433? If so, how should I optimize RF parameters
Based on the current distance, is it a configuration issue that caused the communication distance of 50kbps to be too low? (Can only reach 1/4 of 5kbps), if so, how should I modify it?
How much difference is there between a communication distance of 50kbps and 5kbps under normal circumstances?
When I connected 30 sensor nodes at a communication distance of about 100 meters, the packet loss rate was too high (about 50%) at 4.5kbps. So, how should I optimize the RF parameters at 5kbps to reduce the data packet loss rate?

  • 0
    TI__Genius 11215 points

    Hi,

    Please first go through the steps outlined in SWRA603 (Debugging Communication Range): https://www.ti.com/lit/swra603

    We strongly recommend using SmartRF Studio 7: https://www.ti.com/tool/SMARTRFTM-STUDIO for evaluating, modifying, and testing your RF settings in order to isolate just the RF performance.

    Most regulations for operation at 433 MHz have a maximum output power limit of +10 to +13 dBm, so please can you confirm that you are able to operate at +15 dBm output power?

    Regards,

    Zack

  • 0 in reply to ZC
    Intellectual 436 points

    Hi Zack:

    Our hardware engineers have already completed the above steps
    And our testing engineers have also conducted tests on SmartRF Studio 7,
    However, the RF configuration in SmartRF Studio 7 software seems to be unable to be applied to the 15.4 protocol stack. For example, the Deviation option cannot be configured in sysconfig. We can use SmartRF Studio 7 to reach about 400 meters in the same testing environment, and about 700 meters in open environments

    We have confirmed that it can support a power of 15dbm. How can we configure 15dbm for cc1312?

    Regards,

    Faker