Nrf24l01 cant communicate with each other

Using Arduino Networking, Protocols, and Devices
1

Hi!
I've tried following Simple nRF24L01+ 2.4GHz transceiver demo but all i'm getting from running the code in #2 is : "Data Sent Message 0 Tx failed". Afterwards i tried running the code in #30 and received these results:

CheckConnection Starting

FIRST WITH THE DEFAULT ADDRESSES after power on
Note that RF24 does NOT reset when Arduino resets - only when power is removed
If the numbers are mostly 0x00 or 0xff it means that the Arduino is not
communicating with the nRF24

STATUS = 0x0e RX_DR=0 TX_DS=0 MAX_RT=0 RX_P_NO=7 TX_FULL=0
RX_ADDR_P0-1 = 0xe7e7e7e7e7 0x4141417852
RX_ADDR_P2-5 = 0xc3 0xc4 0xc5 0xc6
TX_ADDR = 0xe7e7e7e7e7
RX_PW_P0-6 = 0x20 0x20 0x20 0x20 0x20 0x20
EN_AA = 0x3f
EN_RXADDR = 0x02
RF_CH = 0x4c
RF_SETUP = 0x07
CONFIG = 0x0e
DYNPD/FEATURE = 0x00 0x00
Data Rate = 1MBPS
Model = nRF24L01+
CRC Length = 16 bits
PA Power = PA_MAX

AND NOW WITH ADDRESS AAAxR 0x41 41 41 78 52 ON P1
and 250KBPS data rate

STATUS = 0x0e RX_DR=0 TX_DS=0 MAX_RT=0 RX_P_NO=7 TX_FULL=0
RX_ADDR_P0-1 = 0xe7e7e7e7e7 0x4141417852
RX_ADDR_P2-5 = 0xc3 0xc4 0xc5 0xc6
TX_ADDR = 0xe7e7e7e7e7
RX_PW_P0-6 = 0x20 0x20 0x20 0x20 0x20 0x20
EN_AA = 0x3f
EN_RXADDR = 0x02
RF_CH = 0x4c
RF_SETUP = 0x27
CONFIG = 0x0e
DYNPD/FEATURE = 0x00 0x00
Data Rate = 250KBPS
Model = nRF24L01+
CRC Length = 16 bits
PA Power = PA_MAX

and:

CheckConnection Starting

FIRST WITH THE DEFAULT ADDRESSES after power on
Note that RF24 does NOT reset when Arduino resets - only when power is removed
If the numbers are mostly 0x00 or 0xff it means that the Arduino is not
communicating with the nRF24

STATUS = 0x0e RX_DR=0 TX_DS=0 MAX_RT=0 RX_P_NO=7 TX_FULL=0
RX_ADDR_P0-1 = 0x4141417852 0x4141417852
RX_ADDR_P2-5 = 0xc3 0xc4 0xc5 0xc6
TX_ADDR = 0x4141417852
RX_PW_P0-6 = 0x20 0x20 0x20 0x20 0x20 0x20
EN_AA = 0x3f
EN_RXADDR = 0x03
RF_CH = 0x4c
RF_SETUP = 0x01
CONFIG = 0x0e
DYNPD/FEATURE = 0x00 0x00
Data Rate = 1MBPS
Model = nRF24L01+
CRC Length = 16 bits
PA Power = PA_MIN

AND NOW WITH ADDRESS AAAxR 0x41 41 41 78 52 ON P1
and 250KBPS data rate

STATUS = 0x0e RX_DR=0 TX_DS=0 MAX_RT=0 RX_P_NO=7 TX_FULL=0
RX_ADDR_P0-1 = 0x4141417852 0x4141417852
RX_ADDR_P2-5 = 0xc3 0xc4 0xc5 0xc6
TX_ADDR = 0x4141417852
RX_PW_P0-6 = 0x20 0x20 0x20 0x20 0x20 0x20
EN_AA = 0x3f
EN_RXADDR = 0x03
RF_CH = 0x4c
RF_SETUP = 0x21
CONFIG = 0x0e
DYNPD/FEATURE = 0x00 0x00
Data Rate = 250KBPS
Model = nRF24L01+
CRC Length = 16 bits
PA Power = PA_MIN

What's even weirder is that if I switch the ardinos around so that the receiver becomes the transmitter, and the transmitter becomes the receiver then I get nothing at all.

I am using 2 arduino uno both hooked up to my pc.

2

On both Unos I have CE on pin 9, CSN on pin 10, Mosi on pin 11, Miso on pin 12, and SCK on pin 13

3

So you dont even get the "CheckConnection Starting" message ?

Or perhaps describe what 'nothing at all' means ?

4

Make sure the rf24 power supply can provide enough current. I use homemade adapters like these. They are powered by 5V and have a 3.3V regulator on the board.

If using the high powered radios make sure to separate them by a few meters. The may not work too close together.

Reset the radios by cycling power to them after uploading new code. I have found that to help. They do not reset with the Arduino.

Switch to 1MB data rate to catch the not so cloned clones.

5

All I get on the transmitter is "SimpleTx Starting" and on the receiver "SimpleRx Starting"

Could u explain what u mean by this / how i do it?

6

https://nrf24.github.io/RF24/classRF24.html#aeb9920e7a95699748b003c4a839b0814

7

Still getting Data sent message 0 Tx failed :confused:

8

Nobody can see or know what you are doing,
what modules you are using, and how the modules are powered.

The tx test without any fail/success messages points to a general problem.

9

I am using 2 Nrf24l01 and both are powered through the 3.3v on the respective arduino uno.

10

That is as specific as requesting a car repair for a Ford.
I have around 10 variants of NRF24L01+.

This does - as already suggested - not work reliably on many Unos,
from my experience it very often needs at least a capacitor (1-10uF) directly on the module pins,
bigger SMD capacitors fit there perfectly.

11

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