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[Issue Report] Causes and Countermeasures for Equipment Data Not Being Received Even When Connected to the Router

LTE connection is normal, but data is not coming through? Explanation of cause analysis and countermeasures.

"Although the LTE router is connected, the equipment data is not reaching the monitoring screen" — are you facing such troubles? In IoT remote monitoring for factories, plants, and water treatment facilities, even if the LTE line is functioning normally, monitoring data may not be updated due to issues with VPN connections, communication routes, data transmission settings, or server processing. This technical report divides the communication route from equipment and sensors to the monitoring screen into seven stages, explaining the confirmation points to identify the location of failures and the troubleshooting procedures that can be used on-site. [What you can learn from this document] * Main causes of data not being received even when connected to LTE * Confirmation points and troubleshooting procedures by symptoms * Considerations for checking logs on the VPN, device side, and server side * Design and operational measures to minimize data loss * Case studies of troubles addressed by MI Corporation Please use this for responding to equipment monitoring system failures, reviewing maintenance systems, and designing new IoT implementations. We also accept inquiries regarding remote monitoring and IoT communications.