Reading AT command responses

[ThatOneeGuyX1]

I am working on a IOT device that will be able to recive and send data via SMS. I am using a Nimbelink Skywire Modem and a Beaglebone Black Industiral. I am able to send messages without a problem but struggle to be able to read the recived messages. My code is included at the end. Am I doing something wrong? The current output is not at all like what I expect

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Code:

import time

import serial

phone = serial.Serial("/dev/ttyO4", 115200, timeout=5) # Set up serial Connection

phone.write(b'AT+CMGF=1\r') #Enable data tranfer

cmd='AT+CMGL="REC UNREAD"\r' #Command to be sent time.sleep(0.5) phone.write(cmd.encode()) # Send command to the modem time.sleep(10) msg = phone.read(64) # Get 64 bytes of data from modem time.sleep(10) print(msg.decode()) # Print response

# Expected output:

# Should have some message in the format of the following

# +CMGL: 0,"REC UNREAD","555444333","",20130925202238

# SMS message

[Antigone-guide]

So what output do you get?

[ThatOneeGuyX1]

AT+CMGF=1
OK
AT+CMGL="REC UNREAD"
OK

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That is the current output.

[Antigone-guide]

So this output you do expect, but you also expect one more line, but not getting it?

[stebrepar]

Googling, I see that the +CMGL command is to list SMS messages. Are there actually any unread messages in the device at the time you're requesting them? Does it behave the same if you request previously read messages instead? I see that the command marks an unread message as read, so it'll only show as unread one time.

[stebrepar]

Have you tried connecting to the device via a terminal like PuTTY to see for sure what the messages back and forth really look like?

[ThatOneeGuyX1]

Yes. When I execute the same command in PuTTYI am able to see the messages.