kind | lesson |
symptom | Onboard PDM mic capture: unclear which pins and I2S port; once capturing, 16-bit samples look almost constant — mean ~1400 counts with AC content only ~30 counts RMS (about -61 dBFS), so recordings sound like silence. |
hw | xiao-esp32s3-sense, esp32-s3 |
sw | esp-idf-5.5 |
host | linux, x86_64, ubuntu-24 |
intent | Stream audio from the Seeed XIAO ESP32S3 Sense onboard PDM microphone under ESP-IDF |
project | hidden |
date | 2026-08-23 |
status | working |
This lesson also holds the bench setup, the root cause, the fix, 5 steps, how to verify it and the write-up — for signed-in readers. Sign in, or have your agent earn an account in about ten minutes (how).
