nrf24l01+ Auto acknowledge problem

[YDoc]

I have an application where I am sending a fixed packet length of 32 bytes to data pipe 1.

I have set the data width to 32,

I have auto acknowledge enabled on P1.

I have the TX and P0 address of the transmitter set to the P1 address of the receiver.

The data makes it to the receiver OK and is very repeatable but I don't ever get an acknowledge interrupt. I always get the MAX_RT interrupt. 

I have read back all the registers and they are what I expect them to be. 

   This is actually post of the someone at other forums, but the my situation %100  same ... so looking for advice to find the problem...  Thanks for your time ...

[Håkon Alseth]

Hi,

 

Could you post the configuration on both ends?

It is very important that this is equal on both sides.

Kind regards,

Håkon

[YDoc]

// Transmitter

uint8_t nrf_tx_addr[ ] ={
0xE8,
0xE8,
0xE8,
0xE8,
0xE8
};

uint8_t nrf_rx_addr_p0[ ] ={
0xE8,
0xE8,
0xE8,
0xE8,
0xE8
};

uint8_t nrf_rx_addr_p1[ ] ={
0xC1,
0xC1,
0xC1,
0xC1,
0xC1
};

nrf_WriteRegister(nrf_reg_SETUP_AW,0x03);                           // Address width adjusted to 5 bytes
nrf_WriteRegister(nrf_reg_EN_AA,0x03);                                   // Auto ACK enabled for only data pipe 0,1

nrf_WriteRegister(nrf_reg_EN_RXADDR,0x03);                         // RX Pipelines enabled( 0 and 1 )


nrf_WriteRegister(nrf_reg_rx_pw_P0,32);                                   // PAYLOAD width of P0 adjusted to 32 bytes
nrf_WriteRegister(nrf_reg_rx_pw_P1,32);                                   // PAYLOAD width of P1 adjusted to 32 bytes


nrf_MultiWriteRegister(nrf_reg_Tx_ADDR,nrf_tx_addr,5);                    // Transmit address
nrf_MultiWriteRegister(nrf_reg_RX_ADDR_P0,nrf_rx_addr_p0,5);      // Receive address of pipeline 0
nrf_MultiWriteRegister(nrf_reg_RX_ADDR_P1,nrf_rx_addr_p1,5);      // Receive address of pipeline 1


nrf_WriteRegister(nrf_reg_SETUP_RETR,0x28);                        // 750uS Auto retransmit delay , 8 max auto retransmit 
nrf_WriteRegister(nrf_reg_RF_SETUP,0x0E);                             // Output Power = 0 dBm , Datarate = 2 Mbps
nrf_WriteRegister(nrf_reg_RF_CH,0x2A);                                   // Frequency band = 2400 MHz + 42 = 2442 MHz

//  For Receiver  same configuration with  address setting at below 

uint8_t nrf_tx_addr[] ={
0xC1,
0xC1,
0xC1,
0xC1,
0xC1
};

uint8_t nrf_rx_addr_p0[] ={
0xC1,
0xC1,
0xC1,
0xC1,
0xC1
};

uint8_t nrf_rx_addr_p1[] ={
0xE8,
0xE8,
0xE8,
0xE8,
0xE8
};

[Håkon Alseth]

I do not see anything standing out wrt. your configuration. As long as you also set the payload width to 32 and the RF channel to 42 on the PRX side as well, it should work.

Do you have more than one module that you see this issue on? Could you post pictures of the modules that you use?

This is actually post of the someone at other forums, but the my situation %100  same

Could you post the link to this?