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SMARTRFTRXEBK: Packet Sniffer sniffing SimpliciTI issue

Stefan Radunovic
Prodigy 60 points
Part Number: SMARTRFTRXEBK
Other Parts Discussed in Thread: CC1101, SIMPLICITI

Hello everyone,

I'm using SMARTRF-TRXEB PCB rev 1.5 with CC1101 and Packet Sniffer application to sniff SimpliciTI protocol packets from a network I'm developing using SimpliciTI. The sniffer works when SimpliciTi radio settings are default (2-GFSK, 902MHz, 250kbaud, 540kHz Rx Filter, 200kHz channel spacing,  127kHz deviation, channel 20, Manchester disabled, 30/32 sync, preamble count 4, DC filter disabled). But, if I change radio settings to DC filter enable and change the modulation to 2-FSK (both in the SimpliciTI devices and in the sniffer) my SimpliciTI devices communicate properly, but the sniffer doesn't pick any packets. If I continue using 2-GFSK and enable DC filter, SimpliciTI devices stop communicating as well, and the Sniffer still doesn't see anything. Basically, the Sniffer only managed to sniff packets for me if the DC filter was disabled. Any thoughts on this? Why is it so?

Thanks.

PS. I'm using the following radio settings:

2-FSK, 20kHz deviation, 38.4kBaud, 120kHz Rx bandwidth, 150kHz channel bandwidth, Manchester disabled, 30/32 sync, preamble count 4, DC filter enabled, 4 channels

2-FSK, 50kHz deviation, 100kBaud, 250kHz Rx bandwidth, 300kHz channel bandwidth, Manchester disabled, 30/32 sync, preamble count 4, DC filter enabled, 2 channels

2-GFSK, 127kHz deviation, 250kBaud, 540kHz Rx bandwidth, 400kHz channel bandwidth, Manchester disabled, 30/32 sync, preamble count 4, DC filter disabled(doesn't work with enabled), 1 channel.

  • 0
    TI__Guru* 82351 points
    I have been testing your settings with SmartRF Studio, and I am not having any problems with these settings.
    Please test your settings in SmartRF Studio first and make sure they are OK. When you have settings that works, you can export them to your SimpliciTI application. Not sure what HW you are running your SimpliciTI application at, but if you can connect this HW to SmartRF Studio as well, it would be good to confirm that the new settings work on all devices and between all devices.
    If all devices can communicate with each other whit the new settings when using SmartRF Studio, but you cannot communicate from the SimpliciTI application to the Sniffer, you need to check that there is no place in the SimpliciTI application you settings are getting overwritten.
    BR
    Siri