: The probe is placed perpendicular to the skin and pressed lightly until a click is heard. The device typically calculates an average (AVE) from three sequential measurements.
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The manual includes the UART debug commands to ping the wireless module. Using a USB-to-TTL adapter, you can input AT+CONNCHECK directly to the serial bus to see if the antenna is disconnected or the module is dead. : The probe is placed perpendicular to the