Develop Reference

Send data between two pico with LoRa

I am trying to send data from a Pico Raspberry Pi to another Pico through an SX1262, but I can't send it.
I already tried the ping pong example, but the SX1262 library gives me errors in the Thonny IDE.
Traceback (most recent call last):
File "", line 19, in
File "/lib/sx1262.py", line 27, in begin
File "/lib/sx126x.py", line 115, in begin
File "/lib/sx126x.py", line 240, in reset
File "/lib/sx126x.py", line 389, in standby
File "/lib/sx126x.py", line 1270, in SPIwriteCommand
File "/lib/sx126x.py", line 1287, in SPItransfer
TypeError: object with buffer protocol required
Then we tried to use AT commands, but there is no response (code). We don't want to use LoRaWAN.
Can you please help if you found the solution?

I tried this and it works: try this
https://github.com/ehong-tl/micropySX126X

VI_ERROR_TMO (-1073807339) on Anritsu OSA

I'm working on interfacing an old Optical Spectrum Analyzer Anritsu MS9710B with a RS232 connection. A year ago, I managed to comunicate with him, send SCPI command using pyvisa and receive data. Today, I execute the exact same code with libraries up to date and I get an error Timeout when I query IDN or anything. The RS232-USB drivers are ok, I manage to open a communication but a query or read fail.
I changed the parameter to "RS232C" on the OSA parameters and my communication parameters are the same between OSA and program. Following advices from the forum, I tried the connection with NI-VISA where I get the same error. I tried to change timeout parameter, write_termination and read_termination but there isn't any change. The manual is very hard to understand termination value, but when it worked I didn't add anything.
I don't know anymore what to do.
Any advices and help would be warmly welcome to fix my problem !
import pyvisa
from pyvisa.constants import StopBits, Parity
rm = pyvisa.ResourceManager()
print(rm.list_resources())
my_instrument = rm.open_resource('ASRL5::INSTR')
my_instrument.baud_rate=9600
my_instrument.data_bits=8
my_instrument.parity=Parity.even
my_instrument.stop_bits=StopBits.one
my_instrument.write('*IDN?')
print(my_instrument.read())```
'''
('ASRL5::INSTR',)
Traceback (most recent call last):
File "PremiereComm.py", line 26, in <module>
print(my_instrument.read())
File "C:\Program Files\Python38\lib\site-packages\pyvisa\resources\messagebased.py", line 486, in read
message = self._read_raw().decode(enco)
File "C:\Program Files\Python38\lib\site-packages\pyvisa\resources\messagebased.py", line 442, in _read_raw
chunk, status = self.visalib.read(self.session, size)
File "C:\Program Files\Python38\lib\site-packages\pyvisa\ctwrapper\functions.py", line 2337, in read
ret = library.viRead(session, buffer, count, byref(return_count))
File "C:\Program Files\Python38\lib\site-packages\pyvisa\ctwrapper\highlevel.py", line 222, in _return_handler
return self.handle_return_value(session, ret_value) # type: ignore
File "C:\Program Files\Python38\lib\site-packages\pyvisa\highlevel.py", line 251, in handle_return_value
raise errors.VisaIOError(rv)
pyvisa.errors.VisaIOError: VI_ERROR_TMO (-1073807339): Timeout expired before operation completed.
>>> '''

Can't send packets (Errno 9: Bad file descriptor)

Hi I'm a beginner with Python and Scapy. When I try to use sendp() on a basic Layer 2 packet, I get a traceback error.
Using Python 3.8 and the latest development version of Scapy from https://scapy.readthedocs.io/en/latest/installation.html#platform-specific-instructions
This is what I'm inputting into the Python shell:
import scapy
from scapy.all import *
a=Ether()/IP(dst="www.google.ca")/ICMP()/"Hello world"
sendp(a)
This is the error message:
Traceback (most recent call last):
File "<pyshell#3>", line 1, in <module>
sendp(a)
File "C:\Users\hoang\AppData\Local\Programs\Python\Python38-32\lib\site-packages\scapy-git_archive.dev304758016-py3.8.egg\scapy\sendrecv.py", line 336, in sendp
results = __gen_send(socket, x, inter=inter, loop=loop,
File "C:\Users\hoang\AppData\Local\Programs\Python\Python38-32\lib\site-packages\scapy-git_archive.dev304758016-py3.8.egg\scapy\sendrecv.py", line 296, in __gen_send
os.write(1, b".")
OSError: [Errno 9] Bad file descriptor

As pointed by #furas, this is indeed an issue with your console (IDLE?).
Scapy tries to display that the packet was sent, which fails.
You can always use
sendp(p, verbose=False)
To disable the logs, therefore working around the issue.
However I must say that if os.write(1, ..) was the only option back in the days, it's a bit outdated nowadays. This could probably be fixed on upstream.

Using TFTPY in python causing time out

I was trying to transfer a log file using tftp. For client side I am using TFTPY module in python. But it is showing below mentioned error messages.
WARNING:tftpy:Timeout waiting for traffic, retrying...
ERROR:tftpy:Timed-out waiting for traffic
WARNING:tftpy:resending last packet
WARNING:tftpy:Resending packet RRQ packet: filename = /opt/TDK/logs//55194186195512_Console.log mode = octet on sessions <tftpy.TftpStates.TftpStateSentRRQ object at 0xb70a0f8c>
Traceback (most recent call last):
File "callConsoleLogTransfer.py", line 30, in <module>
consoleLogTransfer(IP,Port,logTransferPort,fileName,localFilePath)
File "/file/consoleLogTransfer.py", line 68, in consoleLogTransfer
client.download( remoteFile, localFile, timeout=20 )
File "/usr/local/lib/python2.7/dist-packages/tftpy/TftpClient.py", line 52, in download
self.context.start()
File "/usr/local/lib/python2.7/dist-packages/tftpy/TftpContexts.py", line 378, in start
self.state.resendLast()
File "/usr/local/lib/python2.7/dist-packages/tftpy/TftpStates.py", line 203, in resendLast
(self.context.host, self.context.tidport))
TypeError: an integer is required

Scapy won't send packets in 64 bit Windows

I'm trying a simple code, just sending an ARP packet:
from scapy.all import *
p = ARP()
send(p)
and I get this error:
Traceback (most recent call last):
File "<pyshell#2>", line 1, in <module>
send(p)
File "C:\Python26\scapy\sendrecv.py", line 251, in send
__gen_send(conf.L3socket(*args, **kargs), x, inter=inter, loop=loop,
count=count,verbose=verbose, realtime=realtime)
File "C:\Python26\scapy\sendrecv.py", line 234, in __gen_send
s.send(p)
File "C:\Python26\scapy\arch\pcapdnet.py", line 237, in send
ifs = dnet.eth(iff)
File "dnet.pyx", line 112, in dnet.eth.__init__
OSError: No error
My OS is windows 8 64bit. I tried in win7 64bit and got the same problem. I tried in win7 32bit and that works fine.
I can't understand why.. please help..

I guess you have to inform the interface ID, like this:
sendp(netpacket, iface='eth1')
I had the same trouble as yours, did like I said and got it!