diff --git a/examples/arduino-rx/arduino-rx.ino b/examples/arduino-rx/arduino-rx.ino
index f56516f..506edd2 100644
--- a/examples/arduino-rx/arduino-rx.ino
+++ b/examples/arduino-rx/arduino-rx.ino
@@ -261,6 +261,11 @@ void loop() {
     // Main loop ..
     while (true) {
         while (qsize >= samplesPerFrame) {
+            // Use this with the serial plotter to observe real-time audio signal
+            //for (int i = 0; i < samplesPerFrame; i++) {
+            //    Serial.println(sampleBuffer[qhead + i]);
+            //}
+
             // We have enough captured samples - try to decode any "ggwave" data:
             auto tStart = millis();
 
diff --git a/examples/esp32-rx/esp32-rx.ino b/examples/esp32-rx/esp32-rx.ino
index 99dd0f4..75e3d4b 100644
--- a/examples/esp32-rx/esp32-rx.ino
+++ b/examples/esp32-rx/esp32-rx.ino
@@ -328,15 +328,15 @@ void loop() {
         size_t bytes_read = 0;
         i2s_read(i2s_port, sampleBufferRaw, sizeof(TSampleInput)*samplesPerFrame, &bytes_read, portMAX_DELAY);
 
-        int samples_read = bytes_read/sizeof(TSampleInput);
-        if (samples_read != samplesPerFrame) {
+        int nSamples = bytes_read/sizeof(TSampleInput);
+        if (nSamples != samplesPerFrame) {
             Serial.println("Failed to read samples");
             return;
         }
 
 #if defined(MIC_ANALOG)
         // the ADC samples are 12-bit so we need to do some massaging to make them 16-bit
-        for (int i = 0; i < samples_read; i += 2) {
+        for (int i = 0; i < nSamples; i += 2) {
             auto & s0 = sampleBuffer[i];
             auto & s1 = sampleBuffer[i + 1];
 
@@ -350,14 +350,14 @@ void loop() {
 #endif
 
 #if defined(MIC_I2S) || defined(MIC_I2S_SPH0645)
-        for (int i = 0; i < samples_read; ++i) {
+        for (int i = 0; i < nSamples; ++i) {
             sampleBuffer[i] = (sampleBufferRaw[i] & 0xFFFFFFF0) >> 11;
         }
 #endif
     }
 
     // Use this with the serial plotter to observe real-time audio signal
-    //for (int i = 0; i < samples_read; i++) {
+    //for (int i = 0; i < nSamples; i++) {
     //    Serial.println(sampleBuffer[i]);
     //}
 
diff --git a/examples/rp2040-rx/fritzing-sketch.fzz b/examples/rp2040-rx/fritzing-sketch.fzz
new file mode 100644
index 0000000..7da0721
Binary files /dev/null and b/examples/rp2040-rx/fritzing-sketch.fzz differ
diff --git a/examples/rp2040-rx/fritzing-sketch_bb.png b/examples/rp2040-rx/fritzing-sketch_bb.png
new file mode 100644
index 0000000..2931282
Binary files /dev/null and b/examples/rp2040-rx/fritzing-sketch_bb.png differ
diff --git a/examples/rp2040-rx/rp2040-rx.ino b/examples/rp2040-rx/rp2040-rx.ino
index d8aa1fe..7c2b421 100644
--- a/examples/rp2040-rx/rp2040-rx.ino
+++ b/examples/rp2040-rx/rp2040-rx.ino
@@ -203,7 +203,7 @@ void loop() {
     int nSamples = samplesRead;
     samplesRead = 0;
 
-    //// loop through any new collected samples
+    // Use this with the serial plotter to observe real-time audio signal
     //for (int i = 0; i < nSamples; i++) {
     //    Serial.printf("%d\n", sampleBuffer[i]);
     //}