nRF24L01+ on a Teensy 4.0, transmit says the max number of retransmits is reached but I can't tell if it's actually transmitting

RE: nRF24L01+ on a Teensy 4.0, transmit says the max number of retransmits is reached but I can't tell if it's actually transmitting

heyspencerb — Tue, 22 Jun 2021 20:08:51 GMT

It was just the hardware.... I swapped the module and everything works now

RE: nRF24L01+ on a Teensy 4.0, transmit says the max number of retransmits is reached but I can't tell if it's actually transmitting

heyspencerb — Tue, 22 Jun 2021 15:07:32 GMT

If you're willing to help out I will program anything you suggest and send the results! Thank you

RE: nRF24L01+ on a Teensy 4.0, transmit says the max number of retransmits is reached but I can't tell if it's actually transmitting

heyspencerb — Tue, 22 Jun 2021 15:04:48 GMT

and they have never correctly communicated

RE: nRF24L01+ on a Teensy 4.0, transmit says the max number of retransmits is reached but I can't tell if it's actually transmitting

heyspencerb — Tue, 22 Jun 2021 15:04:13 GMT

Hello! Thanks for the help! So I am able to write and read back and forth from the module and it acts perfectly. I can send config messages and watch on my scope, (it has SPI decode) and I can set the configurations and then read them back after and they are identical. I checked the power of the device and it didn't increase at all except for the jump in power consumption which I'm pretty sure is just from running digitalWrite(CE, HIGH)

RE: nRF24L01+ on a Teensy 4.0, transmit says the max number of retransmits is reached but I can't tell if it's actually transmitting

Håkon Alseth — Tue, 22 Jun 2021 13:01:07 GMT

Hi,

If you check the current consumption of the PTX device (assuming it should always transmit), you can usually see if it transmits or not based on this.

Another test is to scope your lines with a logic analyzer to see if anything does not act as it normally should.

has your devices ever communicated properly with eachother?

Kind regards,

Håkon

RE: nRF24L01+ on a Teensy 4.0, transmit says the max number of retransmits is reached but I can't tell if it's actually transmitting

heyspencerb — Mon, 21 Jun 2021 22:07:29 GMT

I left one line off of the transmitter code, I know I need to run

digitalWriteFast(NRF24_CSN, LOW);

before I can fill the TX FIFO