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CC1101: Looking for design help to xmit data from a sensor

Arif Quronfleh72
Prodigy 90 points
Part Number: CC1101
Other Parts Discussed in Thread: CC1311R3, CC110L

Tool/software:

Hello,

We're working on a project to do the following:

Sensor-> XMIT data (using CC1101 or other) -> Receive and display data on a remote unit. 

This should be on the ISM band. 

We have a preliminary block diagram to do the following:

Send:

  • Sensor connected to the uP (could be analog or I2C)
  • uP to process data (possibly using STM32L431CCT6) < prefer to use a TI uP but has to be very low cost and low power. 
  • Radio chip CC1101 for DATA SEND
  • Buttons for resets and pairing
  • Battery
  • Antenna

Receive: 

  • Radio chip CC1101 for DATA RECEIVE 
  • uP for data processing
  • Display of some sort. 

My main question is on the SEND part above. 

Is there a reference design that provides some feedback or direction specifically schematics and layout?

Feedback on the above SEND function will be greatly appreciated. 

Thanks

Arif 

  • 0
    TI__Genius 17995 points

    Hi Arif,

    I would post a question on the MSP forum for TI MCU recommendations. Alternatively you could consider the CC1311R3 SoC (for a low cost SoC solution).

    We have many HW reference designs we can provide, but this heavily depends on the device(s) and the frequency band(s) chosen - please specify which ISM band you are planning to use. I would recommend deciding for certain which TI transceiver or SoC to use for your design and then I can advise you on a suitable reference design to use for your application.

    Regards,

    Zack

  • 0 in reply to ZC
    Prodigy 90 points

    Hi Zack and thanks for your reply. 

    We hired an engineer to set a preliminary spec do for us and he provided the STM32L431CCT6 uP and the  CC1101. 

    We still have not set the frequency so we're open. But it's within the CC1101 specs. 

    I took a look at the CC1311R3 SoC and it looks good. Possible replaces the two parts above. 

    We are in need of a low cost BOM for the sensor side and need a range of about 100 m (LOS). This will be a single use device. 

    Like I said before, I would much rather use TI solutions on most components on the sensor side. 

    Can you provide direction with this information or do you need more?

    Thanks agian.

    Arif 

  • 0 in reply to Arif Quronfleh72
    TI__Genius 17995 points

    Hi Arif,

    The CC1311R3 is designed as a low-cost option for the CC131x devices. A quick reference is SWRA814 (SimpleLink CC131x and CC135x Family Hardware Migration Guide) https://www.ti.com/lit/swra814 for an overview from a hardware perspective.

    100m LOS range shouldn't be an issue, but it does depend on your environment (for example, indoors vs outdoors) and PHY. You can use our tool for an estimation of the expected range (the accompanying App Note explains how to use it):

    The 868/915 MHz band(s) would allow for a PCB smaller antenna size compared to 433 MHz, if that is a concern for your design. It depends partly on what region(s) this is targeting certification in.

    The alternative would be an MSP MCU + CC110L (CC110L Datasheet: https://www.ti.com/lit/swrs109), which is a cost-optimised version of the CC1101.

    Regards,

    Zack