Wi-Fi Connection Troubleshooting on IMX8MP Board Using ConnMan

1. Use connmanctl to Scan and Connect:

ConnMan handles Wi-Fi connections dynamically, and the usual workflow is to scan for networks, configure them, and connect. Instead of manually creating files, you can follow this process:

• Scan for available networks:
  connmanctl scan wifi
• List available Wi-Fi services:
  connmanctl services

  This will list Wi-Fi networks as wifi_XXXXX_YYYYY_managed_psk. Use this identifier in the next steps.

• Configure Wi-Fi service: Use the SSID found in the services list and configure it with the passphrase:
  arduino:

  connmanctl connect wifi_XXXXX_YYYYY_managed_psk

  When prompted for a passphrase, enter the Wi-Fi password. To do this programmatically, use the following:

• Pre-configure the Wi-Fi credentials with connmanctl: Instead of manually creating the settings file, use ConnMan's API to configure the credentials directly:
  lua:

  connmanctl config wifi_XXXXX_YYYYY_managed_psk --passphrase PASSPHRASE

  This will store the passphrase securely, and next time you can use:
  arduino: connmanctl connect wifi_XXXXX_YYYYY_managed_psk
  
  
  

2. Add Wi-Fi via a Configurable Script:

To script the process without user interaction, you can automate the connmanctl commands. Below is a sample script that automates scanning, connecting, and providing the passphrase.

#!/bin/bash

SSID_NAME=$1
PASSPHRASE=$2

# Ensure connman is running
connmanctl scan wifi
# List available Wi-Fi services
AVAILABLE_NETWORK=$(connmanctl services | grep "$SSID_NAME" | awk '{print $3}')

# Check if network is available
if [ -n "$AVAILABLE_NETWORK" ]; then
    # Configure the Wi-Fi service with the passphrase
    connmanctl config $AVAILABLE_NETWORK --passphrase $PASSPHRASE
    # Connect to the service
    connmanctl connect $AVAILABLE_NETWORK
else
    echo "Network not found"
    exit 1
fi

3. Verify Configuration:

Ensure that ConnMan is correctly managing the interface for Wi-Fi. You can check the status of ConnMan services and interfaces using:

connmanctl technologies

Make sure the wifi technology is enabled.

4. Debugging ConnMan:

If the problem persists, check the system logs for ConnMan errors:

journalctl -u connman

This will provide more detailed information about what ConnMan is doing during the connection process and help isolate any issues with how Wi-Fi services are registered.

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