CC1200: Usage in Wireless Sensor Networks

Saber Kazeminasab

Part Number: CC1200

Hi Ti community

I need to have wireless communication with the following characteristics. (The communication environment is in water)

1- The communication is bi-directional. I mean the chips at both sides of the communication be able to send and receive data packets (They are transceivers.)

2- The carrier frequency is changeable (434 MHz is desired).

3- And more importantly, I need the communication to be able to have connection pick capability like RFID systems. In other words, if the chip at one side closes the chip at another side which advertising a unique signal, it can pick the connection and establish the communication.

After some searches, I came up with CC1200 a physical layer. Do you think this chip has the mentioned communication parameters?

Also, can you please let me know what communication protocol this chip is following?

Thanks and Regards

Saber

over 3 years ago

0 Eirik V over 3 years ago

TI__Guru 56590 points

I have assigned an expert to comment.

0 TER over 3 years ago in reply to Eirik V

TI__Guru**** 317180 points

"I need to have wireless communication with the following characteristics. (The communication environment is in water) ": Have you looked into the physics of water and RF? Have you calculated if you are able to achieve the range you require?

0 Siri over 3 years ago in reply to TER

TI__Guru* 79421 points

I am not sure I understand requirement # 3:

I need the communication to be able to have connection pick capability like RFID systems. In other words, if the chip at one side closes the chip at another side which advertising a unique signal, it can pick the connection and establish the communication.

The radio will receive packets from all devices that sends with the same RF parameters (frequency, data rate, modulation format etc.) given that the signal is strong enough and that the sync word is the same.

The packet format for the CC1200 is pictured in the data sheet. It does not follow any communication protocol, as you need to write your own protocol.

You can use SmartRF Studio to evaluate the chip, and also take a look at the available code examples here:

Siri

0 Saber Kazeminasab over 3 years ago in reply to Siri

Expert 1080 points

Thanks, Siri for your reply.

I did an experiment to investigate the signal strength to see if the coming signal from the sensor network inside water is strong enough. To do so, I put the sensors connected to the communication setup inside ziplock bag and put it in the bucket of water. For the range of around 10 meters, the RSSI was -47dbm which could be detected.

As for question #1, can I have bi-directional communication with the chip?

Thanks

Saber

0 TER over 3 years ago in reply to Saber Kazeminasab

TI__Guru**** 317180 points

Non of the CC1xxx devices are bi-directional.

0 Saber Kazeminasab over 3 years ago in reply to TER

Expert 1080 points

But in its datasheet, it is mentioned that CC1200 is a transceiver.

0 TER over 3 years ago in reply to Saber Kazeminasab

TI__Guru**** 317180 points

Sorry, I read it as full-duplex since that is a common question. Yes, as you can see from the datasheet the part can do both RX and TX but not on the same time.

0 Saber Kazeminasab over 3 years ago in reply to TER

Expert 1080 points

Thanks a lot!

Saber

Sub-1 GHz

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CC1200: Usage in Wireless Sensor Networks