From 82422a8ef89ca7988eddcddc5b2e18147d52d72d Mon Sep 17 00:00:00 2001
From: iamromulan <50184035+iamromulan@users.noreply.github.com>
Date: Sat, 20 Jan 2024 22:16:25 -0500
Subject: [PATCH] Create ICCID_APN.sh

---
 ICCID_APN.sh | 101 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 ICCID_APN.sh

diff --git a/ICCID_APN.sh b/ICCID_APN.sh
new file mode 100644
index 0000000..9ec5dde
--- /dev/null
+++ b/ICCID_APN.sh
@@ -0,0 +1,101 @@
+#!/bin/sh
+
+# Configuration
+DEVICE_FILE="/dev/smd7"
+ICCID_FILE="/path/to/iccid_master_file" # Path to the ICCID-APN-IPType master file
+TMP_DIR="/tmp"
+TIMEOUT=4
+
+# Start listening to device file
+start_listening() {
+    cat "$DEVICE_FILE" > "$TMP_DIR/device_readout" &
+    CAT_PID=$!
+}
+
+# Send AT command
+send_at_command() {
+    local command=$1
+    echo -e "${command}\r" > "$DEVICE_FILE"
+}
+
+# Wait for and process response
+wait_for_response() {
+    local start_time=$(date +%s)
+    local current_time
+    local elapsed_time
+
+    while true; do
+        if grep -q "OK" "$TMP_DIR/device_readout" || grep -q "ERROR" "$TMP_DIR/device_readout"; then
+            RESPONSE=$(cat "$TMP_DIR/device_readout")
+            echo "Response received: $RESPONSE"
+            return 0
+        fi
+        current_time=$(date +%s)
+        elapsed_time=$((current_time - start_time))
+        if [ "$elapsed_time" -ge "$TIMEOUT" ]; then
+            echo "Error: Response timed out."
+            return 1
+        fi
+        sleep 1
+    done
+}
+
+# Cleanup function
+cleanup() {
+    kill "$CAT_PID"
+    wait "$CAT_PID" 2>/dev/null
+    rm -f "$TMP_DIR/device_readout"
+}
+
+# Function to send AT command and wait for response
+send_and_wait() {
+    send_at_command "$1"
+    wait_for_response
+}
+
+# Function to update the APN
+update_apn() {
+    local slot=$1
+    local apn=$2
+    local iptype=$3
+    send_and_wait "AT+CGDCONT=$slot,\"$iptype\",\"$apn\""
+    if [ $? -eq 0 ]; then
+        echo "APN updated successfully."
+    else
+        echo "Failed to update APN."
+    fi
+}
+
+# Main Execution
+if [ -c "$DEVICE_FILE" ]; then
+    start_listening
+
+    # Get ICCID
+    send_and_wait "AT+CCID"
+    ICCID=$(echo "$RESPONSE" | grep "+CCID" | cut -d ':' -f2 | tr -d '[:space:]')
+    echo "ICCID: $ICCID"
+
+    # Check ICCID in master file
+    if grep -q "$ICCID" "$ICCID_FILE"; then
+        APN=$(grep "$ICCID" "$ICCID_FILE" | cut -d ',' -f2)
+        IP_TYPE=$(grep "$ICCID" "$ICCID_FILE" | cut -d ',' -f3)
+        IP_TYPE=${IP_TYPE:-"IPV4V6"} # Default to IPV4V6 if not specified
+
+        # Get current APN settings
+        send_and_wait "AT+CGDCONT?"
+        CURRENT_APN=$(echo "$RESPONSE" | grep "+CGDCONT: 1" | cut -d ',' -f3 | tr -d '"')
+
+        # Compare and update APN if necessary
+        if [ "$APN" != "$CURRENT_APN" ]; then
+            update_apn 1 "$APN" "$IP_TYPE"
+        else
+            echo "No APN update needed."
+        fi
+    else
+        echo "ICCID not found in the master file."
+    fi
+
+    cleanup
+else
+    echo "Error: Device $DEVICE_FILE does not exist or is not a character special file."
+fi