Engineer uses ESP32-S3 to connect vintage rotary phone to modern LTE network

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A developer has created RotaryCell, an open-source project that enables an unmodified rotary telephone to make calls over a 4G LTE network. The project uses an ESP32-S3 microcontroller as the bridge between the analog rotary mechanism and modern cellular infrastructure. No hardware modifications to the original phone are required, preserving the device's vintage integrity. The project's code and documentation have been published on GitHub for others to replicate or build upon.

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