Cordless phone intereference with NRF24L01P

[Hamid Reza]

Hello everybody it's a couple of mounth that our company is working on nrf24L01P .It works fine but there is a problem with cordless phone. when I make a call with the a 2.4GHZ cordless phone the nrf24l01p module hangs!!!! I changedthe RF frequency channel from 40 to 100 but the problem exist.

 
  nRF_SPI_RW_Reg(WRITE_REG + EN_AA, 0x3f);            // Enable Auto.Ack:Pipes 0-5
  nRF_SPI_RW_Reg(WRITE_REG + EN_RXADDR, 0x3f);        // Enable Pipes 0-5
  nRF_SPI_RW_Reg(WRITE_REG + SETUP_RETR, 0xff);       // 4000µs + 86µs, 15 retrans...
  nRF_SPI_RW_Reg(WRITE_REG + RF_CH, 40);              // Select RF channel 40

  nRF_SPI_RW_Reg(WRITE_REG + RF_SETUP, 0x27);         // TX_PWR:0dBm, Datarate:250kbps,
  nRF_SPI_RW_Reg(WRITE_REG + CONFIG, 0x0e);           // Set PWR_UP bit, enable CRC(2 bytes) & Prim:TX. MAX_RT & TX_DS enabled..

all suggestion and recommendation are welcomed.

[Kenneth]

When problems like that occur I typically ask if you have checked out all the Notes in the datasheet and made sure they are handled in the application code: https://www.nordicsemi.com/eng/content/download/2726/34069/file/nRF24L01P_Product_Specification_1_0.pdf

E.g. Always check if the packet width reported is 32 bytes or shorter when using the R_RX_PL_WID command. If its width is longer than 32 bytes then the packet contains errors and must be discarded. Discard the packet by using the Flush_RX command.

The 3 bit pipe information in the STATUS register is updated during the IRQ pin high to low transition. The pipe information is unreliable if the STATUS register is read during an IRQ pin high to low transition.