NRF24L01+ PIPE SETTINGS

[KALPESH PATEL]

Hello,

i just want setup 1Tx and 1 RX using NRF24L01+ chips. but i am confused what should be Transmitter side Tx & Rx and what should be in Rx Tx & RX ? in order to use auto-ack feature.

which addresses sould be kept in Transmitter and Receiver side ? could you please explain with some example as i am not able to understand...

Please help

Thanks

[KALPESH PATEL]

Hi Hakon,

Finally i am able to get the TX_DS and MAX_RT bits with my led. I have tried with HW SPI MCU and it worked. Soft SPI is not working with NRF24L01+ i don't know why everything seems to be fine. Now i have issue of speed and range. I have tried to put both the module to 250kbps to get more range. by setting RF_DR_LOW = 1 & RF_DR_HIGH = 0. // speed set to 250kbps. Is there any thing else to set ? Because i got worst range with 250kbps. Even it did not cross single wall properly. People say when you transmit at lower rates you get better range. But in my case its completed vice-versa. With default 2mbps speed i am getting good range in my home with 3-4 walls crossed easily. So what you say ? what could be the issue with 250kbps ? and practically low speed high range ? right ?

awaiting your reply.

[Håkon Alseth]

Hi,

250kBit mode should give you better range. We have seen that if you poll registers (ie: SPI communication always running), you may get reduced sensitivity due to noise. What you should do is to check the "IRQ" pin (or set interrupt on this pin) before doing any communication.

-H

[KALPESH PATEL]

You means to say,

When some interrupt occurs (IRQ Pin goes low) then i should stop polling registers, means i should stop spi communication ? Please elborate i am not able to understand you regarding 250kbps speed settings. I want long range so i need to use 250kbps. So please guide me because right now 250kbps is giving worst range.

Thanks.

[Håkon Alseth]

What you can try:

1. Use interrupt on IRQ pin instead of polling in your main-loop. (ie: wait untill IRQ is active before checking radio-registers)
2. Use a slower SPI transfer rate (< 1 MHz for instance)

Best regards Håkon