NRF905 carrier detection end CD end cannot be set high and cannot receive

panda_man

NRF905 carrier detection end CD end cannot be set high and cannot receive [Copy link]

I debugged an NRF905 module before. The final result was that the transmission was successful. The DR terminal could be successfully set high. This means that the data could be sent out. But the problem is that the carrier detection terminal CD at the receiving end cannot be set high. Therefore, the address terminal AM and the data preparation terminal DR cannot be set high. It cannot be received. I think if it can be sent successfully, it means that there is no problem with the SPI protocol and register configuration, and it should be the same for reception. Even if there is a problem with the data, at most the address cannot be identified. It cannot be received. At least the carrier can be detected. The carrier should only be related to the transmission frequency of the circuit and related hardware. Of course, it is also possible that the pin could not be set high originally. I would like to ask my brother for an answer.

kata

Carrier detection requires the antenna to transmit and receive normally to work, so check the high frequency part.

panda_man

Could you please give me some advice? I bought the module. It is all SMD components. If I want to check it, where should I start?

牛明强

Same question, need an answer urgently.

rocky2015

Have you solved it? I encountered the same problem.

朋友遍天下

Have you guys solved it?