nrf24l01

[pedrofelipest]

Hello everyone, I use Wipy 2.0 in an esp32 wroom32 and I can not use a micropython library for nrf24l01. can anybody help me?

[robert-hh]

@pedrofelipest said in nrf24l01:
Please verify a) the intended connection as below

CE on P6 -> GPIO27
CSN on P21 ->GPIO26
SCK on P22 ->GPIO25
MISO on P12 -> GPIO21
MOSI on P20 -> GPIO33

b) The semantics of the SPI method may be different between the poerts. Please compare the different ports (Pycom and micropython) by printing the results and self.buf content from write_register and read_register.

[pedrofelipest]

You have returned this error. And u checked nrf and it's working. I tested it in standard Arduino code.

File "<stdin>", line 1, in <module>
  File "boot.py", line 34, in master
  File "nrf24l01.py", line 77, in __init__
OSError: nRF24L01+ Hardware not responding

CE on P6
CSN on P21
SCK on P22
MISO on P12
MOSI on P20

[robert-hh]

@pedrofelipest said in nrf24l01:

self.spi.readinto(self.buf, 0x20 | reg)

According to the documentation, the syntax is:
self.spi.readinto(self.buf, write=(0x20 | reg))
or later
self.spi.readinto(self.buf, write=value)
If that works, you have to change the other places too.

[pedrofelipest]

I set the pins to use the SPI

csn = Pin(cfg['csn'], mode=Pin.OUT, value=1)
ce = Pin(cfg['ce'], mode=Pin.OUT, value=0)
spi = SPI(0, pins=('P22','P20','P12'))
nrf = NRF24L01(spi, csn, ce, payload_size=8)

Make a mistake in the library

def reg_write(self, reg, value):
    self.cs(0)
    self.spi.readinto(self.buf, 0x20 | reg) # The mistake happens here. More arguments than necessary
    ret = self.buf[0]
    self.spi.readinto(self.buf, value)
    self.cs(1)
    return ret

[robert-hh]

@pedrofelipest Yes, and my other question:

• how do you call that module? Which parameters do you use?
• What is the result of the call. Any error messages?

[pedrofelipest]

It is https://github.com/micropython/micropython/blob/master/drivers/nrf24l01/nrf24l01test.py @robert-hh

[robert-hh]

@pedrofelipest Please give a link to that library, post the section of code in which you use the library and what kind of response you get.