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Integration Overview

With hardware wired and individual drivers tested, this section brings everything together into a working clock.

Strategy: Layered Bring-Up​

The most reliable way to integrate hardware is the same way you would integration-test software: verify each layer before adding the next.

If something fails at layer 3, you know the problem is in a feature layer, not the hardware wiring or driver — because you verified those earlier.

What to Expect​

  • First boot will probably not work perfectly. That is normal. Expect to iterate.
  • Serial output is your debugger. ESP_LOGI / ESP_LOGW / ESP_LOGE are your best friends. Add log output liberally — you can strip it later.
  • One change at a time. If you add three things and something breaks, you do not know which one caused it.

Integration Sections​

  1. Bring-Up Sequence — a 9-step process from bare drivers to full firmware, with expected serial output at each step
  2. End-to-End Smoke Test — a scripted test to run once the full firmware is flashed
  3. Troubleshooting — symptom → cause → fix for common failures