I know this has been asked a few times, but I am having a hell of a time receiving a ACK packet from my nrf24l01+ receiver (PRX). I am able to successfully send packets from 5 radios to my receiver. My issue is I am not getting an ACK back from the receiver. Here is my configuration:
Settings Receiver (PRX):
STATUS: 0x0E – Initial status – TX FIFO is empty and No Data Pipe Received
CONFIG: 0x4B - PRIM_RX = 1, PWR_UP = 1, EN_CRC = 1, MASK_RX_DR = 1
RF_CH: 0x47 – Channel 71
RF SETUP: 0x26 – RF_PWR = 0dBm, RF_DR_LOW = 1
EN_AA: 0x3F - All pipes enable Auto Acknowledgment
EN_RXADDR: 0x3F – Enable all RX addresses
FEATURE: 0x06 – EN_ACK_PAY = 1, EN_DPL = 1
DYNPD: 0x3F – Dynamic Payload enabled all pipes
OBSERVE_TX: 0x0F -
RX_ADDR_P0: 0x78 0x78 0x78 0x78 0x78
RX_ADDR_P1: 0xB3 0xB4 0xB5 0xB6 0xF1
RX_ADDR_P2: 0xB3 0xB4 0xB5 0xB6 0xCD
RX_ADDR_P3: 0xB3 0xB4 0xB5 0xB6 0xA3
RX_ADDR_P4: 0xB3 0xB4 0xB5 0xB6 0xF
RX_ADDR_P5: 0xB3 0xB4 0xB5 0xB6 0x5
Settings Sender (PTX5) – 5 node
STATUS: 0x0E
CONFIG: 0x4B
RF_CH: 0x47
RF SETUP: 0x26
EN_AA: 0x3F
EN_RXADDR: 0x3F
FEATURE: 0x06
DYNPD: 0x3F
OBSERVE_TX: 0x0F
TX_ADDR: 0xB3 0xB4 0xB5 0xB9 0x5
RX_ADDR_P0: 0xB3 0xB4 0xB5 0xB9 0x5
In my code, I am loading the ack packet before anything is received.
void receive_data(){
// preload ack data
ack_payload[0] = 0xFF;
nrf24_setAckPayLoad(&ack_payload, 5,BUF_LENGTH); // load ack for pipe 5
if(nrf24_dataReady())
{
// get the payload size
uint8_t payLoadsize = nrf24_getPayloadLength();
if(payLoadsize > 32){
printf("Invalid payload length received: %d\n\r", payLoadsize);
return;
}
printf("Payload Size: %d\n\r", payLoadsize);
nrf24_getPayLoad(&data_array, payLoadsize);
// TEST READ BACK
for(uint8_t i = 0; i < payLoadsize ;i++){
printf("Received Data %d: %d\n\r", i, data_array[i]);
}
printf("<<< Data Complete From Radio Pipe %d>>>\n\r", data_array[0]);
}
}
My Transmitter is sending the data and checking for ACK here:
void send_data(){
if(fakeval > 120){
fakeval = 0; // reset
}
data_array[0] = node; // node id
for(uint8_t z = 1; z < 32; z++){
data_array[z] = fakeval++; // fill with dummy data
}
printf("Sending Payload size: %d\n\r", sizeof(data_array));
nrf24_sendPayLoad(&data_array, sizeof(data_array));
while(nrf24_isSending()){};
// get ack payload
uint8_t ackdata = nrf24_rxFifoEmpty();
printf("Ack? : %d\n\r", ackdata);
if(ackdata == 0){ // rx has data when 0
// grab data from RX FIFO
}
}
Any advice is greatly appreciated.
