MicroPython library for controlling a Semtech SX127x LoRa module over SPI.
The logic for the code came from this module but was streamlined and rewritten to be more MicroPython-friendly.
The module requires an SPI bus connected to the SX127x, one pin to be cs (chip select), and one to be the rx (receive IRQ).
lora = LoRa(
spi,
cs=Pin(CS, Pin.OUT),
rx=Pin(RX, Pin.IN),
)
You can send bytes or a string (which will be encoded to bytes). A ValueError exception will be raised if the message exceeds the allowed payload length. Currently this method blocks until the message is sent.
lora.send('Hello world!')
Receiving is done by attaching a handler using on_recv and then calling recv to put the device in receive mode. Receive mode is non-blocking so other code can run after calling recv but if you call send afterward you will need to put the device back into receive mode again.
def handler(x):
print(x)
lora.on_recv(handler)
lora.recv()