Buffer size **SOLVED**

[timeb]

Hello,

I was using struct to unpack a message with destination, source address, length of Ack and Ack as the following *** _LORA_ACK_FORMAT = "!4s4sBB"
*** recv_pkg = lora_sock.recv(512)
*** dest_addr,src_addr,pkg_len msg = struct.unpack(_LORA_PKG_FORMAT % recv_pkg_len, recv_pkg) . I get ValueError: buffer too small. What might be causing this? Any suggestion?

[livius]

solved by chat

reason was in

recv_pkg_len = recv_pkg[1]

but package was modified by different device_ID length
and for modified device length - data length was in different place

recv_pkg_len = recv_pkg[8]

and in

struct.unpack(_LORA_PKG_FORMAT % recv_pkg_len, recv_pkg)

instead recv_pkg_len=4 recv_pkg_len got value 164
caused ValueError: buffer too small

[JeromeMaquoi]

Hello livius,

I have the same problem but I don't understand what you said about it. How can I fix this problem?

Have a nice evening,

Jérôme Maquoi

[livius]

@jeromemaquoi
really better if you show some sample what do.
As you can read here detail was provided by chat
but better is write on the forum and ask question with sample and exact error message.