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Tool/software: Code Composer Studio
Dear Mods and friends,
We have designed our own PCB using CC1352R as the communication chip for both BLE5 and Sub-Ghz. The BLE5 part and related software have run correctly. However, the Sub-Ghz part has not run successfully.
1. We replaced the Balun components as in the LAUNCHPAD with a Balun chip: 0850BM14E0016:
2. Then we used a Wire antenna with a length of 86mm as follow:
3. I tested our Designed board as a Sensor and a launchpad CC1352R as a Collector: This Sensor is Active Scanning (toggle LED each time it calls function sendScanReq). I also measured the frequency that it transmitted with another launchpad (as a network analyzer). It actually can transmit radio signals about 868Mhz. However, this designed board cannot receive any Beacon indication back from the Collector (scanCnfCb does not give any successful status). So at the end, it cannot join the collector's PAN.
4. I tested the designed board with rfEasyLinkRx and rfEasyLinkTx: a. When I turned on the board as rfEasyLinkTx, the network analyzer can detect frequency about 868Mhz but the rfEasyLinkRx - Launchpad cannot receive any packet. Also, when I turned the designed board as rfEasyLinkRx, it cannot receive any packet from the Launchpad- rfEasyLinkTx.
5. Do you have any suggestions for me to improve the matching between this designed board and launchpad CC1352R?
6. Did we miss any important components that are required to help Sensor be able to join Collector's PAN.
Really hope to hear any advice soon.
Thank you very much.