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LoRa with Raspberry pi and Python

Hi,

I am trying to make two raspberry pi communicate through LoRa (SX127x). (https://media.digikey.com/pdf/Data%20Sheets/Semtech%20PDFs/SX1272MB2DAS_HM.PDF)

When I try the following code, I get the following error :

Code :
**import digitalio
import board
import busio
import adafruit_rfm9x

RADIO_FREQ_MHZ = 915.0
CS = digitalio.DigitalInOut(board.CE1)
RESET = digitalio.DigitalInOut(board.D25)
spi = busio.SPI(board.SCK, MOSI=board.MOSI, MISO=board.MISO)
rfm9x = adafruit_rfm9x.RFM9x(spi, CS, RESET, RADIO_FREQ_MHZ)**

Error :
Traceback (most recent call last):
File "/home/pi/Downloads/test.py", line 10, in
rfm9x = adafruit_rfm9x.RFM9x(spi, CS, RESET, RADIO_FREQ_MHZ)
File "/usr/local/lib/python3.7/dist-packages/adafruit_rfm9x.py", line 250, in init
"Failed to find rfm9x with expected version -- check wiring"
RuntimeError: Failed to find rfm9x with expected version -- check wiring

The wiring is good (double-triple-quadruple checked)

I tried switching CE1 and CE2 and GPIO's, but it doesn't seem to work.

Now I know that this is a RFM library, but the RFM is build on SX127x's chips isn't it?

Any help would be greatly appreciated!

The library I first tried is this one : https://github.com/adafruit/Adafruit_CircuitPython_RFM9x
Jul 7 '21 #1
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