sparkle mini factorytest

Factory_Tests/Adafruit_Sparkle_Motion_Mini_FactoryTest/Adafruit_Sparkle_Motion_Mini_FactoryTest.ino

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+// SPDX-FileCopyrightText: 2025 Limor Fried for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+#include <Arduino.h>
+#include "WiFi.h"
+#include <Adafruit_TestBed.h>
+#include "ESP_I2S.h"
+extern Adafruit_TestBed TB;
+
+// I2S pin definitions
+const uint8_t I2S_SCK = 23;  // BCLK
+const uint8_t I2S_WS = 10;   // LRCLK
+const uint8_t I2S_DIN = 9;  // DATA_IN
+I2SClass i2s;
+
+// the setup routine runs once when you press reset:
+void setup() {
+  Serial.begin(115200);
+  pinMode(LED_BUILTIN, OUTPUT);
+  digitalWrite(LED_BUILTIN, HIGH);
+  i2s.setPins(I2S_SCK, I2S_WS, -1, I2S_DIN);
+  if (!i2s.begin(I2S_MODE_STD, 44100, I2S_DATA_BIT_WIDTH_16BIT, I2S_SLOT_MODE_MONO, I2S_STD_SLOT_LEFT)) {
+    Serial.println("Failed to initialize I2S bus!");
+    return;
+  }
+  // TestBed will handle the neopixel swirl for us
+  TB.neopixelPin = PIN_NEOPIXEL;
+  TB.neopixelNum = 1;
+  TB.begin();
+
+  // Set WiFi to station mode and disconnect from an AP if it was previously connected
+  WiFi.mode(WIFI_STA);
+  WiFi.disconnect();
+}
+
+// the loop routine runs over and over again forever:
+uint8_t wheelColor=0;
+void loop() {
+  if (wheelColor == 0) {
+    // Test I2C!
+    Serial.print("I2C port ");
+    TB.theWire = &Wire;
+    TB.printI2CBusScan();
+
+    // Test WiFi Scan!
+    // WiFi.scanNetworks will return the number of networks found
+    int n = WiFi.scanNetworks();
+    Serial.print("WiFi AP scan done...");
+    if (n == 0) {
+        Serial.println("no networks found");
+    } else {
+        Serial.print(n);
+        Serial.println(" networks found");
+        for (int i = 0; i < n; ++i) {
+            // Print SSID and RSSI for each network found
+            Serial.print(i + 1);
+            Serial.print(": ");
+            Serial.print(WiFi.SSID(i));
+            Serial.print(" (");
+            Serial.print(WiFi.RSSI(i));
+            Serial.print(")");
+            Serial.println((WiFi.encryptionType(i) == WIFI_AUTH_OPEN)?" ":"*");
+            delay(10);
+        }
+    }
+    Serial.println("");
+    for (int i=0; i < 5; i++) {
+      int32_t sample = i2s.read();
+      if (sample >= 0){
+        Serial.print("Amplitude: ");
+        Serial.println(sample);
+
+        // Delay to avoid printing too quickly
+        delay(200);
+        }
+      }
+  }
+
+  TB.setColor(TB.Wheel(wheelColor++)); // swirl NeoPixel
+  digitalWrite(LED_BUILTIN, !digitalRead(LED_BUILTIN));
+
+  delay(5);
+}

Sparkle_Motion_Mini_Examples/Arduino_I2S_SparkleMotionMini/Arduino_I2S_SparkleMotionMini.ino

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+// SPDX-FileCopyrightText: 2025 Limor Fried for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+
+#include <Arduino.h>
+#include "ESP_I2S.h"
+
+// I2S pin definitions for Sparklemotion
+const uint8_t I2S_SCK = 23;  // BCLK
+const uint8_t I2S_WS = 10;   // LRCLK
+const uint8_t I2S_DIN = 9;  // DATA_IN
+
+// Create I2S instance
+I2SClass i2s;
+
+void setup() {
+  // Fast serial for plotting
+  Serial.begin(500000);
+
+  // Initialize I2S
+  i2s.setPins(I2S_SCK, I2S_WS, -1, I2S_DIN);
+  if (!i2s.begin(I2S_MODE_STD, 44100, I2S_DATA_BIT_WIDTH_16BIT, I2S_SLOT_MODE_MONO, I2S_STD_SLOT_LEFT)) {
+    Serial.println("Failed to initialize I2S bus!");
+    return;
+  }
+
+  Serial.println("I2S Mic Plotter Ready");
+}
+
+void loop() {
+  static uint32_t lastPlot = 0;
+
+  // Get a sample
+  int32_t sample = i2s.read();
+
+  // Only plot every 1ms (1000 samples/sec is plenty for visualization)
+  if (millis() - lastPlot >= 1) {
+    if (sample >= 0) {  // Valid sample
+      // Plot both raw and absolute values
+      Serial.printf("%d,%d\n", (int16_t)sample, abs((int16_t)sample));
+    }
+    lastPlot = millis();
+  }
+}