SierraWirelessAirPrime_MC7304_sms

kzo81 · 07-19-2023, 12:34 AM

Hi Folks,

I got this device working with qmi driver. However I'd like to process sms commands as well.
Do you have any idea how can I process an incoming sms that is "status" and the the device would reply it's state, rssi, etc". I didnt find sms section in the qmi driver.

Thanks

kzo81 · 07-20-2023, 02:19 AM

I'm doing this in 1 terminal:

Code:

echo -ne 'ATI\r\n' > /dev/ttyUSB0
echo -ne 'ATI\r\n' > /dev/ttyUSB1
echo -ne 'ATI\r\n' > /dev/ttyUSB2

and reading in another terminal from all possible variations:

Code:

tail -f /dev/ttyUSB0
tail -f /dev/ttyUSB1
tail -f /dev/ttyUSB2

nehakwilas · 07-20-2023, 08:06 AM

Hi,
I did use Python and the pyserial library to send and receive SMS messages using AT commands.

Code:

import serial

# Replace '/dev/ttyUSB0' with the appropriate serial port for your modem
ser = serial.Serial('/dev/ttyUSB0', baudrate=115200, timeout=1)

# Function to send an AT command and read the response
def send_at_command(command):
    ser.write(command.encode() + b'\r\n')
    response = ser.read(1024).decode('utf-8')
    return response.strip()

# Check if the modem is ready
response = send_at_command('AT')
if 'OK' not in response:
    print('Modem not ready or not responding to AT commands.')
    ser.close()
    exit()

# Set the SMS text mode
send_at_command('AT+CMGF=1')

# Read an incoming SMS message
response = send_at_command('AT+CMGR=1')

# Process the response to extract the SMS content and sender information
if '+CMGR:' in response:
    sms_index = response.index('+CMGR:')
    sms_content = response[sms_index:].split('\n', 2)[2].strip()
    print('Received SMS:')
    print(sms_content)

# Close the serial connection
ser.close()

kzo81 · 07-20-2023, 01:47 PM

I see :-) but I dont have python on that device, is it doable in bash?

nehakwilas · 07-20-2023, 03:12 PM

Yes it is possible to interact using bash scripts..

Quote:

#!/bin/bash

# Replace '/dev/ttyUSB0' with the appropriate serial port for your modem
modem_port='/dev/ttyUSB0'

# Function to send an AT command and read the response
function send_at_command() {
echo -ne "$1\r\n" > "$modem_port"
sleep 1 # Wait for the response (adjust the sleep duration if needed)
cat "$modem_port"
}

# Check if the modem is ready
response=$(send_at_command 'AT')
if [[ $response != *"OK"* ]]; then
echo "Modem not ready or not responding to AT commands."
exit 1
fi

# Set the SMS text mode
send_at_command 'AT+CMGF=1'

# Read an incoming SMS message
response=$(send_at_command 'AT+CMGR=1')

# Process the response to extract the SMS content and sender information
if [[ $response == *'+CMGR:'* ]]; then
sms_index=$(echo "$response" | grep -b -o '+CMGR:' | cut -d: -f1)
sms_content=$(echo "$response" | tail -n +$((sms_index+1)) | sed '1,2d')
echo "Received SMS:"
echo "$sms_content"
fi

nehakwilas · 07-20-2023, 03:13 PM

You can use the echo command to send AT commands to the modem and cat or tail to read the responses from the modem.

nehakwilas · 07-20-2023, 03:14 PM

Save the file as sms_processing.sh with x permission
Try if this work to you.