Connection Issues with Arduino Nano 33 BLE Rev2 and Edge Impulse Using build-in Microphone

Help
,
#1

Question/Issue:
I’m having trouble initializing the PDM microphone and connecting my Arduino Nano 33 BLE Rev2 to Edge Impulse. Despite the library being installed and the hardware set up correctly, the connection fails, and I cannot stream data to Edge Impulse.

Project ID:
01

Context/Use case:
I am trying to use the onboard PDM microphone of my Arduino Nano 33 BLE Rev2 to capture audio data and stream it to Edge Impulse for analysis. However, I am unable to establish a working connection and facing issues with library recognition and initialization.

Steps Taken:

  1. Installed the Adafruit Zero PDM Library (1.2.3) via Arduino IDE.
  2. Verified that the PDM files are available in the correct library paths, but the IDE doesn’t recognize them.
  3. Attempted to connect the Arduino to Edge Impulse using the Edge Impulse CLI, but the connection times out.|

Expected Outcome:
I expected the PDM microphone to initialize properly, and for Edge Impulse to connect and start streaming the data.

Actual Outcome:
• I receive an error when trying to install the PDM library:
Error installing PDM: Library ‘PDM@latest’ not found
• I get the following error when trying to connect to Edge Impulse:

"Edge Impulse serial daemon v1.31.0
Endpoints:
Websocket: wss://remote-mgmt.edgeimpulse.com
API: https://studio.edgeimpulse.com
Ingestion: https://ingestion.edgeimpulse.com

[SER] Connecting to /dev/tty.usbmodem1101
[SER] Serial is connected, trying to read config…
[SER] Failed to get info off device Timeout when waiting for > (timeout: 5000) onConnected
[SER] Serial is connected, trying to read config…
[SER] Failed to get info off device Timeout when waiting for > (timeout: 5000) onConnected …"

Reproducibility:

  • [X ] Always
  • [ ] Sometimes
  • [ ] Rarely

Environment:

  • Platform: Arduino Nano 33 BLE Rev2
  • Build Environment Details: Arduino IDE (latest version)
  • macOS

Additional Information:

  • I’m using a USB-C data cable directly connected from my MacBook to the Arduino.
  • The PDM microphone is not being recognized by the Edge Impulse daemon.
  • I have also tried using the Adafruit Zero PDM Library, but it didn’t resolve the issue.