> ## Documentation Index
> Fetch the complete documentation index at: https://docs.efference.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Run a Health Check

> Run device diagnostics over USB or Bluetooth LE

Run the normal health sweep and print each check. Pass `true` to
`health_check()` for the deep stress tier.

<Tabs>
  <Tab title="Wired">
    ```cpp theme={null}
    #include <iostream>
    #include <ef/Device.hpp>

    int main() {
        ef::Device device;
        if (device.open() != ef::ERROR_CODE::SUCCESS) {
            return 1;
        }

        ef::HealthStatus health;
        ef::ERROR_CODE status = device.health_check(health);
        if (status != ef::ERROR_CODE::SUCCESS) {
            std::cerr << ef::to_string(status) << "\n";
            return 1;
        }

        for (const ef::HealthCheck& check : health.checks) {
            std::cout << (check.passed ? "PASS " : "FAIL ")
                      << check.name << " " << check.detail << "\n";
        }

        device.close();
        return health.passed ? 0 : 1;
    }
    ```
  </Tab>

  <Tab title="Wireless">
    A control-only BLE session is sufficient.

    ```cpp theme={null}
    #include <iostream>
    #include <ef/Device.hpp>

    int main() {
        ef::InitParameters init;
        init.input_type = ef::INPUT_TYPE::STREAM;
        init.ble_address = "AA:BB:CC:DD:EE:FF";
        init.ble_password = "123456";

        ef::Device device;
        if (device.open(init) != ef::ERROR_CODE::SUCCESS) {
            return 1;
        }

        ef::HealthStatus health;
        ef::ERROR_CODE status = device.health_check(health);
        if (status != ef::ERROR_CODE::SUCCESS) {
            std::cerr << ef::to_string(status) << "\n";
            return 1;
        }

        for (const ef::HealthCheck& check : health.checks) {
            std::cout << (check.passed ? "PASS " : "FAIL ")
                      << check.name << " " << check.detail << "\n";
        }

        device.close();
        return health.passed ? 0 : 1;
    }
    ```
  </Tab>
</Tabs>