Housekeeping

examples/VoltmeterSayQ/VoltmeterSayQ.ino

@@ -58,16 +58,6 @@
 #define Serial SerialUSB
 #endif
 
-#if defined(ESP32)
-/*
- * Send serial info over Bluetooth
- * Use the Serial Bluetooth Terminal app and connect to ESP32_Talkie
- */
-#include "BluetoothSerial.h"
-BluetoothSerial SerialBT;
-#define Serial SerialBT // redirect all Serial output to Bluetooth
-#endif
-
 /*
  * Voice PWM output pins for different ATmegas:
  *  ATmega328 (Uno and Nano): non inverted at pin 3, inverted at pin 11.
@@ -85,14 +75,10 @@ Talkie Voice;
 void setup() {
 //    pinMode(LED_BUILTIN, OUTPUT);
 
-#if defined(ESP32) && defined(Serial)
-    Serial.begin("ESP32_Talkie", false);
-#else
     Serial.begin(115200);
     while (!Serial)
         ; // Wait for Serial to become available. Is optimized away for some cores.
 
-#endif
 #if defined(__AVR_ATmega32U4__) || defined(SERIAL_PORT_USBVIRTUAL) || defined(SERIAL_USB) /*stm32duino*/|| defined(USBCON) /*STM32_stm32*/ \
     || defined(SERIALUSB_PID)  || defined(ARDUINO_ARCH_RP2040) || defined(ARDUINO_attiny3217) || (defined (USBCON) && defined(USBD_USE_CDC))
     delay(4000); // To be able to connect Serial monitor after reset or power up and before first print out. Do not wait for an attached Serial Monitor!

src/Talkie.cpp

@@ -331,7 +331,7 @@ void Talkie::initializeHardware() {
 #  define APB_FREQUENCY_DIVIDER 80
     if(sTalkieSampleRateTimer == NULL) {
 #  if ESP_ARDUINO_VERSION >= ESP_ARDUINO_VERSION_VAL(3, 0, 0)  // timerAlarm() enables it automatically
-    sTalkieSampleRateTimer = timerBegin(1000000);   // Only 1 parameter is required. 1000000 corresponds to 1 MHz / 1 uSec
+    sTalkieSampleRateTimer = timerBegin(1000000); // Only 1 parameter is required. 1000000 corresponds to 1 MHz / 1 uSec. After successful setup the timer will automatically start.
     timerAttachInterrupt(sTalkieSampleRateTimer, timerInterrupt);
     timerAlarm(sTalkieSampleRateTimer, (getApbFrequency() / APB_FREQUENCY_DIVIDER) / SAMPLE_RATE, true, 0);   // 0 in the last parameter is repeat forever
 #  else
@@ -465,7 +465,7 @@ void Talkie::terminateHardware() {
 #elif defined(ESP32)
     if(sTalkieSampleRateTimer != NULL) {
 #    if ESP_ARDUINO_VERSION >= ESP_ARDUINO_VERSION_VAL(3, 0, 0)
-        timerStop(sTalkieSampleRateTimer);
+        timerStop(sTalkieSampleRateTimer); // maybe timerEnd() is better, because it releases the hardware?
 #    else
         timerAlarmDisable(sTalkieSampleRateTimer);
 #    endif

src/digitalWriteFast.h

@@ -29,6 +29,10 @@
 
 #include <Arduino.h> // declarations for the fallback to digitalWrite(), digitalRead() etc.
 
+#if defined(MEGATINYCORE)
+#error Do not use "#include digitalWriteFast.h" because megaTinyCore has it own digitalWriteFast function set, except digitalToggleFast().
+#endif
+
 // --- Arduino Mega and ATmega128x/256x based boards ---
 #if (defined(ARDUINO_AVR_MEGA) || \
        defined(ARDUINO_AVR_MEGA1280) || \