WPA Key has illegal character (! and ?) with Intercel router

Context
When using an Intercel router in a Wi-Fi bridge configuration, connection errors may occur if the Wi-Fi password (WPA key) contains certain special characters, specifically “!” or “?”. This article explains the cause and possible workarounds.

Information

Cause of the Issue

• The character “!” is used as a separator in the modem’s internal coding.

• This creates compatibility issues when used inside Wi-Fi passwords.

• The “?” character has also been reported to cause problems in bridge configurations.

• These limitations are linked to the Intercel router firmware and cannot be fixed directly.

Troubleshooting

• Ask the customer to share the exact error message displayed when the connection fails.

• Confirm that the router is indeed in Wi-Fi bridge mode and not another configuration.

Workarounds

Since no official fix was provided by Intercel, the following alternatives can be used:

1. Change the Wi-Fi Password

   • Remove special characters “!” or “?” from the WPA key.

2. Use Another Configuration

   • If possible, reconfigure the router to avoid bridge mode.

3. Replace the Device

   • Use a different router or device that supports Wi-Fi bridge mode with special characters in passwords.

Conclusion
The Intercel router may fail to connect in Wi-Fi bridge mode if the WPA key contains “!” or “?”. Updating the password or switching to another configuration/device are the only current solutions.

👉 Need further help? Contact support@robotiq.com