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In this video, we will create a link drop sensor with an ESP32 and a SIM800. This means that with this project, we can verify the connection to the internet, and in the event of a connection failure, call a telephone number to notify that the network is in trouble.
This is one many ways you can perform this type of monitoring. While it’s simple, it allows you to test various devices that may exist within your CPD. Its power of check becomes much greater when using the ESP32. Though I use WiFi in this example, you can use wired internet, if you prefer.”

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