Object with buffer protocol required
Hi, I was trying to send ASCII txt from Lopy4 to gateway where I now tried to send the ascii txt in packets but based on line by line so that I can easily reconstruct the ascii txt on the receive node/gateway.
I used the code below;
from network import LoRa import socket import ubinascii import struct from time import sleep LORA_FREQUENCY = 915000000 LORA_NODE_DR = 3 lora = LoRa(mode=LoRa.LORAWAN, region=LoRa.AU915) dev_addr = struct.unpack(">l", ubinascii.unhexlify('0024f28c')) nwk_swkey = ubinascii.unhexlify('fce40d8e91545d50e2f914022f66a0cb') app_swkey = ubinascii.unhexlify('c003d97951bf56d7e1ec8d8f0f9d2cee') lora.join(activation=LoRa.ABP, auth=(dev_addr, nwk_swkey, app_swkey)) s.setsockopt(socket.SOL_LORA, socket.SO_DR, LORA_NODE_DR) s = socket.socket(socket.AF_LORA, socket.SOCK_RAW) s.setblocking(True) f = open("SIGN.txt", "rb") n = 30 '''characters_per_packet''' def split(s, n): if len(s) <= n: return [s] else: return split(s[:n], n) + split(s[n:], n) if __name__ == "__main__": while True: line = f.readline() if not line: print("Finished Printing") break send_packet = split(line, n) print(send_packet) s.send(send_packet)
But upon execution, I came with the error saying 'Object with buffer protocol required' (error nature attached). I tried to browse for how to build buffer protocol for this program but could not figure out. Any help would be appreciated.
Thank you in advance
@robert-hh Thank you so much. Thank you for correcting me. Yes now I am able to send successfully.
robert-hh last edited by
@phusy012 You supplied a list to send, but send requires a bytearray, bytes-object or string. The function split and the logic you are calling seems not to match. If you want split to return a list of smaller chunks, the you must have send to iterate over these chunks, like:
send_packet = split(line, n) print(send_packet) for packet in send_packet: s.send(packet)