Added support for port-expander PCA9555

README.md

@@ -5,9 +5,9 @@
 * DE: Ich habe ein primär deutschsprachiges Forum aufgesetzt, welches ich mit reichlich Doku versehen habe. Würde mich freuen, euch dort zu sehen: https://forum.espuino.de. Ihr könnt euch dort mit eurem Github-Login einloggen, jedoch auch "normal" anmelden. Dokumenation findet ihr insbesondere hier: https://forum.espuino.de/c/dokumentation/anleitungen/10
 ## Changelog
 Moved to [another location](changelog.md) as it became to prominent here. Only last three events are kept:
-* 25.02.2020: Added support for .m4a and .wav-files.
-* 26.02.2020: Shutdown via webgui is now available.
-* 05.03.2020: Added support for remote control via infrared. Make sure to enable `IR_CONTROL_ENABLE` to use this feature and don't forget to assign corresponding rc-commands of *your* remote control to actions.
+* 26.02.2021: Shutdown via webgui is now available.
+* 05.03.2021: Added support for remote control via infrared. Make sure to enable `IR_CONTROL_ENABLE` to use this feature and don't forget to assign corresponding rc-commands of *your* remote control to actions.
+* 19.03.2021: Added support for port-expander PCA9555. Can be used for everything, that is "button-like": buttons, headphone-detect, PN5180.IRQ.
 ## Known bugs
 * Some webstreams don't run. Guess it's a combination of saturated connection-pool and lack of heap-memory. Works probably better if ESP32-WROVER (e.g. Lolin D32 pro) is used, as this chip has PSRAM. Advice: Don't enable modules (e.g. MQTT) if you don't need them as this could save memory (and trouble).
 * English translation/version for webgui is currently pretty outdated. This will be fixed soon when i18n-support will be integrated.
@@ -219,6 +219,10 @@ This toggles the current WiFi-status: if it's currently enabled, it will be disa
 
 ## Bluetooth
 ESPuino can be used as bluetooth-sink (a2dp). This mode can be enabled/disabled via a RFID-modification-card. Applying one will restart ESPuino immediately. Two modes are available which are toggled in between: "normal" and "bluetooth". Normal means: SD + WiFi are available whereas in mode "bluetooth" only bluetooth-support can be provided. If bluetooth is active, this is indicated by four slow rotating *blue* LEDs. Now you can stream to your ESPuino e.g. with your mobile device. Tested this with Android 8 and worked 100% flawless.
+
+## Port-expander
+There might be situations where you run out of GPIOs. To address this, port-expander [PCA9555](https://www.nxp.com/docs/en/data-sheet/PCA9555.pdf) can be used to extend number of input-channels (output-mode is not supported by ESPuino). This port-expander provides 2 ports with 8 channels each - so 16 channels in total. To activate PCA9555 you need to set `PORT_EXPANDER_ENABLE`. Like GPIOs in your develboard-specific settings-file, you can assign numbers. Range is 100->115 where 100: port 0 channel 0 -> 107: port 0 channel 7; 108: port 1 channel 0 -> 115: port 1 channel 7. If you only need 8 channels: connect stuff only to port 0 and change `portsToRead` to 1. Via `expanderI2cAddress` port-expander's I2C-address can be changed. 0x20 is true, if all A0, A1, A2 are wired to GND.<br />
+Port-expander is read by hardware-timer. Interrupt-pin can be connected optionally and is only used to wake up ESP32. If so I suggest to use `WAKEUP_BUTTON`.
 ## After ESPuino is connected to your WiFi
 After bringing ESPuino part of your LAN/WiFi, the 'regular' webgui is available at the IP assigned by your router (or the configured hostname). Using this GUI, you can configure:
 * WiFi

changelog.md

@@ -18,17 +18,18 @@
 * 20.12.2020: Due to memory-issues with webstreams, FTP needs to be activated by pressing pause+next-button now
 <br />More to come...
 * 23.12.2020: User-config is now split into general part (settings.h) and develboard-specific part (e.g. settings-lolin32.h)
-* 13.01.2020: Added fileexlorer to webgui (thanks @grch87 for contribution!). Now files and directories can be renamed, uploaded and deleted via webgui.
-* 17.01.2020: Added directive `STATIC_IP_ENABLE`: (optional) static IPv4-configuration
-* 18.01.2020: Added directive `PN5180_ENABLE_LPCD`: awake from deepsleep with PN5180 is now possible (but needs another GPIO)
-* 25.01.2020: Added directive `USE_LAST_VOLUME_AFTER_REBOOT`: Remembers volume used at last shutdown after reboot. This overwrites initial volume from GUI.
-* 28.01.2020: Removed cached RFID-filebrowser and replaced by realtime-browser
-* 01.02.2020: Introducing PCB: Lolin32 with SD_MMC + PN5180
-* 06.02.2020: German umlauts now supported. When uploading via FTP make sure to change charset to CP437.
-* 09.02.2020: Added support for bluetooth-sink (a2dp). Thanks @grch87 & @elmar-ops for providing this feature!
-* 25.02.2020: Added support for dynamic button-layout. Rotary-encoder is now optional and up to five buttons can be used.
-* 25.02.2020: Actions can be freely assigned to buttons (multi-button, single-button (short), single-button (long))
-* 25.02.2020: Added support for webcontrol: basic control (volume, play/pause, next, previous, first, last track) can now be controlled via webgui.
-* 25.02.2020: Added support for .m4a and .wav-files.
-* 26.02.2020: Shutdown via webgui is now available.
-* 05.03.2020: Added support for remote control via infrared. Make sure to enable `IR_CONTROL_ENABLE` to use this feature and don't forget to assign corresponding rc-commands of *your* remote control to actions.
+* 13.01.2021: Added fileexlorer to webgui (thanks @grch87 for contribution!). Now files and directories can be renamed, uploaded and deleted via webgui.
+* 17.01.2021: Added directive `STATIC_IP_ENABLE`: (optional) static IPv4-configuration
+* 18.01.2021: Added directive `PN5180_ENABLE_LPCD`: awake from deepsleep with PN5180 is now possible (but needs another GPIO)
+* 25.01.2021: Added directive `USE_LAST_VOLUME_AFTER_REBOOT`: Remembers volume used at last shutdown after reboot. This overwrites initial volume from GUI.
+* 28.01.2021: Removed cached RFID-filebrowser and replaced by realtime-browser
+* 01.02.2021: Introducing PCB: Lolin32 with SD_MMC + PN5180
+* 06.02.2021: German umlauts now supported. When uploading via FTP make sure to change charset to CP437.
+* 09.02.2021: Added support for bluetooth-sink (a2dp). Thanks @grch87 & @elmar-ops for providing this feature!
+* 25.02.2021: Added support for dynamic button-layout. Rotary-encoder is now optional and up to five buttons can be used.
+* 25.02.2021: Actions can be freely assigned to buttons (multi-button, single-button (short), single-button (long))
+* 25.02.2021: Added support for webcontrol: basic control (volume, play/pause, next, previous, first, last track) can now be controlled via webgui.
+* 25.02.2021: Added support for .m4a and .wav-files.
+* 26.02.2021: Shutdown via webgui is now available.
+* 05.03.2021: Added support for remote control via infrared. Make sure to enable `IR_CONTROL_ENABLE` to use this feature and don't forget to assign corresponding rc-commands of *your* remote control to actions.
+* 19.03.2021: Added support for port-expander PCA9555. Can be used for everything, that is "button-like": buttons, headphone-detect, PN5180.IRQ.

src/main.cpp

@@ -47,8 +47,10 @@
 #ifdef RFID_READER_TYPE_MFRC522_SPI
         #include <MFRC522.h>
 #endif
-#ifdef RFID_READER_TYPE_MFRC522_I2C
+#if defined(RFID_READER_TYPE_MFRC522_I2C) || defined(PORT_EXPANDER_ENABLE)
     #include "Wire.h"
+#endif
+#ifdef RFID_READER_TYPE_MFRC522_I2C
     #include <MFRC522_I2C.h>
 #endif
 #ifdef RFID_READER_TYPE_PN5180
@@ -259,6 +261,18 @@ TaskHandle_t fileStorageTaskHandle;
     TaskHandle_t LED;
 #endif
 
+// I2C
+#if defined(RFID_READER_TYPE_MFRC522_I2C) || defined(PORT_EXPANDER_ENABLE)
+    static TwoWire i2cBusTwo = TwoWire(1);
+#endif
+#ifdef RFID_READER_TYPE_MFRC522_I2C
+    static MFRC522 mfrc522(MFRC522_ADDR, MFRC522_RST_PIN, i2cBusTwo);
+#endif
+
+#ifdef PORT_EXPANDER_ENABLE
+    uint8_t expanderPorts[portsToRead];
+#endif
+
 #if (HAL == 2)
     #include "AC101.h"
     static TwoWire i2cBusOne = TwoWire(0);
@@ -267,10 +281,6 @@ TaskHandle_t fileStorageTaskHandle;
 #ifdef RFID_READER_TYPE_MFRC522_SPI
     static MFRC522 mfrc522(RFID_CS, RST_PIN);
 #endif
-#ifdef RFID_READER_TYPE_MFRC522_I2C
-    static TwoWire i2cBusTwo = TwoWire(1);
-    static MFRC522 mfrc522(MFRC522_ADDR, MFRC522_RST_PIN, i2cBusTwo);
-#endif
 
 // FTP
 #ifdef FTP_ENABLE
@@ -327,24 +337,40 @@ QueueHandle_t rfidCardQueue;
 RingbufHandle_t explorerFileUploadRingBuffer;
 QueueHandle_t explorerFileUploadStatusQueue;
 
-// Only enable those buttons that use GPIOs <= 39
+// Only enable those buttons that are not disabled (99 or >115)
+// 0 -> 39: GPIOs
+// 100 -> 115: Port-expander
 #if (NEXT_BUTTON >= 0 && NEXT_BUTTON <= 39)
     #define BUTTON_0_ENABLE
+#elif (NEXT_BUTTON >= 100 && NEXT_BUTTON <= 115)
+    #define EXPANDER_0_ENABLE
 #endif
 #if (PREVIOUS_BUTTON >= 0 && PREVIOUS_BUTTON <= 39)
     #define BUTTON_1_ENABLE
+#elif (PREVIOUS_BUTTON >= 100 && PREVIOUS_BUTTON <= 115)
+    #define EXPANDER_1_ENABLE
 #endif
 #if (PAUSEPLAY_BUTTON >= 0 && PAUSEPLAY_BUTTON <= 39)
     #define BUTTON_2_ENABLE
+#elif (PAUSEPLAY_BUTTON >= 100 && PAUSEPLAY_BUTTON <= 115)
+    #define EXPANDER_2_ENABLE
 #endif
 #ifdef USEROTARY_ENABLE
-    #define BUTTON_3_ENABLE
+    #if (DREHENCODER_BUTTON >= 0 && DREHENCODER_BUTTON <= 39)
+        #define BUTTON_3_ENABLE
+    #elif (DREHENCODER_BUTTON >= 100 && DREHENCODER_BUTTON <= 115)
+        #define EXPANDER_3_ENABLE
+    #endif
 #endif
 #if (BUTTON_4 >= 0 && BUTTON_4 <= 39)
     #define BUTTON_4_ENABLE
+#elif (BUTTON_4 >= 100 && BUTTON_4 <= 115)
+    #define EXPANDER_4_ENABLE
 #endif
 #if (BUTTON_5 >= 0 && BUTTON_5 <= 39)
     #define BUTTON_5_ENABLE
+#elif (BUTTON_5 >= 100 && BUTTON_5 <= 115)
+    #define EXPANDER_5_ENABLE
 #endif
 
 // Prototypes
@@ -353,6 +379,7 @@ static int arrSortHelper(const void* a, const void* b);
 void batteryVoltageTester(void);
 void buttonHandler();
 void deepSleepManager(void);
+bool digitalReadFromAll(const uint8_t _channel);
 void doButtonActions(void);
 void doRfidCardModifications(const uint32_t mod);
 void doCmdAction(const uint16_t mod);
@@ -385,6 +412,9 @@ float measureBatteryVoltage(void);
 #endif
 size_t nvsRfidWriteWrapper (const char *_rfidCardId, const char *_track, const uint32_t _playPosition, const uint8_t _playMode, const uint16_t _trackLastPlayed, const uint16_t _numberOfTracks);
 void onWebsocketEvent(AsyncWebSocket * server, AsyncWebSocketClient * client, AwsEventType type, void * arg, uint8_t *data, size_t len);
+#ifdef PORT_EXPANDER_ENABLE
+    bool portExpanderHandler();
+#endif
 bool processJsonRequest(char *_serialJson);
 void randomizePlaylist (char *str[], const uint32_t count);
 char ** returnPlaylistFromWebstream(const char *_webUrl);
@@ -431,19 +461,6 @@ void logger(const uint8_t _currentLogLevel, const char *_logBuffer, const uint8_
 }
 
 
-int countChars(const char* string, char ch) {
-    int count = 0;
-    int length = strlen(string);
-
-    for (uint8_t i = 0; i < length; i++) {
-        if (string[i] == ch) {
-            count++;
-        }
-    }
-
-    return count;
-}
-
 void IRAM_ATTR onTimer() {
   xSemaphoreGiveFromISR(timerSemaphore, NULL);
 }
@@ -510,6 +527,52 @@ void IRAM_ATTR onTimer() {
     }
 #endif
 
+#ifdef PORT_EXPANDER_ENABLE
+    // Reads input from port-expander and writes output into global array
+    // Datasheet: https://www.nxp.com/docs/en/data-sheet/PCA9555.pdf
+    bool portExpanderHandler() {
+        i2cBusTwo.beginTransmission(expanderI2cAddress);
+        for (uint8_t i=0; i<portsToRead; i++) {
+            i2cBusTwo.write(0x00+i);                        // Go to input-register...
+            i2cBusTwo.endTransmission();
+            i2cBusTwo.requestFrom(expanderI2cAddress, 1);   // ...and read its byte
+
+            if (i2cBusTwo.available()) {
+                expanderPorts[i] = i2cBusTwo.read();
+            } else {
+                return false;
+            }
+        }
+        return false;
+    }
+#endif
+
+
+// Wrapper: reads from GPIOs (via digitalRead()) or from port-expander (if enabled)
+// Behaviour like digitalRead(): returns true if not pressed and false if pressed
+bool digitalReadFromAll(const uint8_t _channel) {
+    switch (_channel) {
+        case 0 ... 39:          // GPIO
+            return digitalRead(_channel);
+
+        #ifdef PORT_EXPANDER_ENABLE
+            case 100 ... 107:   // Port-expander (port 0)
+                return (expanderPorts[0] & (1 << (_channel-100)));    // Remove offset 100 (return false if pressed)
+
+            case 108 ... 115:   // Port-expander (port 1)
+                if (portsToRead == 2) {     // Make sure portsToRead != 1 when channel > 107
+                    return (expanderPorts[1] & (1 << (_channel-108)));    // Remove offset 100 + 8 (return false if pressed)
+                } else {
+                    return true;
+                }
+
+        #endif
+
+        default:                // Everything else (doesn't make sense at all) isn't supposed to be pressed
+            return true;
+    }
+}
+
 
 // If timer-semaphore is set, read buttons (unless controls are locked)
 void buttonHandler() {
@@ -517,24 +580,30 @@ void buttonHandler() {
         if (lockControls) {
             return;
         }
+        #ifdef PORT_EXPANDER_ENABLE
+            portExpanderHandler();
+        #endif
         unsigned long currentTimestamp = millis();
-        #ifdef BUTTON_0_ENABLE
-            buttons[0].currentState = digitalRead(NEXT_BUTTON);
+
+        // Buttons can be mixed between GPIO and port-expander.
+        // But at the same time only one of them can be for example NEXT_BUTTON
+        #if defined(BUTTON_0_ENABLE) || defined(EXPANDER_0_ENABLE)
+            buttons[0].currentState = digitalReadFromAll(NEXT_BUTTON);
         #endif
-        #ifdef BUTTON_1_ENABLE
-            buttons[1].currentState = digitalRead(PREVIOUS_BUTTON);
+        #if defined(BUTTON_1_ENABLE) || defined(EXPANDER_1_ENABLE)
+            buttons[1].currentState = digitalReadFromAll(PREVIOUS_BUTTON);
         #endif
-        #ifdef BUTTON_2_ENABLE
-            buttons[2].currentState = digitalRead(PAUSEPLAY_BUTTON);
+        #if defined(BUTTON_2_ENABLE) || defined(EXPANDER_2_ENABLE)
+            buttons[2].currentState = digitalReadFromAll(PAUSEPLAY_BUTTON);
         #endif
-        #ifdef BUTTON_3_ENABLE
-            buttons[3].currentState = digitalRead(DREHENCODER_BUTTON);
+        #if defined(BUTTON_3_ENABLE) || defined(EXPANDER_3_ENABLE)
+            buttons[3].currentState = digitalReadFromAll(DREHENCODER_BUTTON);
         #endif
-        #ifdef BUTTON_4_ENABLE
-            buttons[4].currentState = digitalRead(BUTTON_4);
+        #if defined(BUTTON_4_ENABLE) || defined(EXPANDER_4_ENABLE)
+            buttons[4].currentState = digitalReadFromAll(BUTTON_4);
         #endif
-        #ifdef BUTTON_5_ENABLE
-            buttons[5].currentState = digitalRead(BUTTON_5);
+        #if defined(BUTTON_5_ENABLE) || defined(EXPANDER_5_ENABLE)
+            buttons[5].currentState = digitalReadFromAll(BUTTON_5);
         #endif
 
         // Iterate over all buttons in struct-array
@@ -551,15 +620,12 @@ void buttonHandler() {
             buttons[i].lastState = buttons[i].currentState;
         }
     }
+    doButtonActions();
 }
 
 
 // Do corresponding actions for all buttons
 void doButtonActions(void) {
-    if (lockControls) {
-        return; // Avoid button-handling if buttons are locked
-    }
-
     if (buttons[0].isPressed && buttons[1].isPressed) {
         buttons[0].isPressed = false;
         buttons[1].isPressed = false;
@@ -2355,7 +2421,7 @@ void gotoLPCD() {
     Serial.println(F("prepare low power card detection..."));
     nfc.prepareLPCD();
     nfc.clearIRQStatus(0xffffffff);
-    Serial.print(F("PN5180 IRQ PIN: ")); Serial.println(digitalRead(RFID_IRQ));
+    Serial.print(F("PN5180 IRQ PIN: ")); Serial.println(digitalReadFromAll(RFID_IRQ));
     // turn on LPCD
     uint16_t wakeupCounterInMs = 0x3FF; //  must be in the range of 0x0 - 0xA82. max wake-up time is 2960 ms.
     if (nfc.switchToLPCD(wakeupCounterInMs)) {
@@ -3739,7 +3805,7 @@ void setupVolume(void) {
         maxVolume = maxVolumeSpeaker;
         return;
     #else
-        if (digitalRead(HP_DETECT)) {
+        if (digitalReadFromAll(HP_DETECT)) {
             maxVolume = maxVolumeSpeaker;               // 1 if headphone is not connected
         } else {
             maxVolume = maxVolumeHeadphone;             // 0 if headphone is connected (put to GND)
@@ -3753,7 +3819,7 @@ void setupVolume(void) {
 
 #ifdef HEADPHONE_ADJUST_ENABLE
     void headphoneVolumeManager(void) {
-        bool currentHeadPhoneDetectionState = digitalRead(HP_DETECT);
+        bool currentHeadPhoneDetectionState = digitalReadFromAll(HP_DETECT);
 
         if (headphoneLastDetectionState != currentHeadPhoneDetectionState && (millis() - headphoneLastDetectionTimestamp >= headphoneLastDetectionDebounce)) {
             if (currentHeadPhoneDetectionState) {
@@ -4330,7 +4396,7 @@ void printWakeUpReason() {
         nfc14443.setupRF();
         if (!nfc14443.isCardPresent()) {
             nfc14443.clearIRQStatus(0xffffffff);
-            Serial.print(F("Logic level at PN5180' IRQ-PIN: ")); Serial.println(digitalRead(RFID_IRQ));
+            Serial.print(F("Logic level at PN5180' IRQ-PIN: ")); Serial.println(digitalReadFromAll(RFID_IRQ));
             // turn on LPCD
             uint16_t wakeupCounterInMs = 0x3FF; //  needs to be in the range of 0x0 - 0xA82. max wake-up time is 2960 ms.
             if (nfc14443.switchToLPCD(wakeupCounterInMs)) {
@@ -4470,32 +4536,32 @@ void setup() {
     #endif
 
     #ifdef NEOPIXEL_ENABLE      // Try to find button that is used for shutdown via longpress-action (only necessary for Neopixel)
-        #ifdef BUTTON_0_ENABLE
+        #if defined(BUTTON_0_ENABLE) || defined(EXPANDER_0_ENABLE)
             #if (BUTTON_0_LONG == CMD_SLEEPMODE)
                 shutdownButton = 0;
             #endif
         #endif
-        #ifdef BUTTON_1_ENABLE
+        #if defined(BUTTON_1_ENABLE) || defined(EXPANDER_1_ENABLE)
             #if (BUTTON_1_LONG == CMD_SLEEPMODE)
                 shutdownButton = 1;
             #endif
         #endif
-        #ifdef BUTTON_2_ENABLE
+        #if defined(BUTTON_2_ENABLE) || defined(EXPANDER_2_ENABLE)
             #if (BUTTON_2_LONG == CMD_SLEEPMODE)
                 shutdownButton = 2;
             #endif
         #endif
-        #ifdef BUTTON_3_ENABLE
+        #if defined(BUTTON_3_ENABLE) || defined(EXPANDER_3_ENABLE)
             #if (BUTTON_3_LONG == CMD_SLEEPMODE)
                 shutdownButton = 3;
             #endif
         #endif
-        #ifdef BUTTON_4_ENABLE
+        #if defined(BUTTON_4_ENABLE) || defined(EXPANDER_4_ENABLE)
             #if (BUTTON_4_LONG == CMD_SLEEPMODE)
                 shutdownButton = 4;
             #endif
         #endif
-        #ifdef BUTTON_5_ENABLE
+        #if defined(BUTTON_5_ENABLE) || defined(EXPANDER_5_ENABLE)
             #if (BUTTON_5_LONG == CMD_SLEEPMODE)
                 shutdownButton = 5;
             #endif
@@ -4547,34 +4613,34 @@ void setup() {
     prefsRfid.putString("228064156042", "#0#0#110#0"); // modification-card (repeat playlist)
     prefsRfid.putString("212130160042", "#/mp3/Hoerspiele/Yakari/Sammlung2#0#3#0");*/
 
-#ifdef NEOPIXEL_ENABLE
-    xTaskCreatePinnedToCore(
-        showLed, /* Function to implement the task */
-        "LED", /* Name of the task */
-        2000,  /* Stack size in words */
-        NULL,  /* Task input parameter */
-        1 | portPRIVILEGE_BIT,  /* Priority of the task */
-        &LED,  /* Task handle. */
-        0 /* Core where the task should run */
-    );
-#endif
+    #ifdef NEOPIXEL_ENABLE
+        xTaskCreatePinnedToCore(
+            showLed, /* Function to implement the task */
+            "LED", /* Name of the task */
+            2000,  /* Stack size in words */
+            NULL,  /* Task input parameter */
+            1 | portPRIVILEGE_BIT,  /* Priority of the task */
+            &LED,  /* Task handle. */
+            0 /* Core where the task should run */
+        );
+    #endif
 
-#if (HAL == 2)
-    i2cBusOne.begin(IIC_DATA, IIC_CLK, 40000);
+    #if (HAL == 2)
+        i2cBusOne.begin(IIC_DATA, IIC_CLK, 40000);
 
-    while (not ac.begin()) {
-        Serial.println(F("AC101 Failed!"));
-        delay(1000);
-    }
-    Serial.println(F("AC101 via I2C - OK!"));
+        while (not ac.begin()) {
+            Serial.println(F("AC101 Failed!"));
+            delay(1000);
+        }
+        Serial.println(F("AC101 via I2C - OK!"));
 
-    pinMode(22, OUTPUT);
-    digitalWrite(22, HIGH);
+        pinMode(22, OUTPUT);
+        digitalWrite(22, HIGH);
 
-    pinMode(GPIO_PA_EN, OUTPUT);
-    digitalWrite(GPIO_PA_EN, HIGH);
-    Serial.println(F("Built-in amplifier enabled\n"));
-#endif
+        pinMode(GPIO_PA_EN, OUTPUT);
+        digitalWrite(GPIO_PA_EN, HIGH);
+        Serial.println(F("Built-in amplifier enabled\n"));
+    #endif
 
     #ifdef RFID_READER_TYPE_MFRC522_SPI
         SPI.begin(RFID_SCK, RFID_MISO, RFID_MOSI, RFID_CS);
@@ -4610,7 +4676,8 @@ void setup() {
                 #endif
             }
 
-    #ifdef RFID_READER_TYPE_MFRC522_I2C
+    // Init 2nd i2c-bus if RC522 is used with i2c or if port-expander is enabled
+    #if defined(RFID_READER_TYPE_MFRC522_I2C) || defined(PORT_EXPANDER_ENABLE)
         i2cBusTwo.begin(ext_IIC_DATA, ext_IIC_CLK, 40000);
         delay(50);
         loggerNl(serialDebug, (char *) FPSTR(rfidScannerReady), LOGLEVEL_DEBUG);
@@ -4634,18 +4701,18 @@ void setup() {
    // print wake-up reason
    printWakeUpReason();
    #ifdef PN5180_ENABLE_LPCD
-     // disable pin hold from deep sleep
-     gpio_deep_sleep_hold_dis();
-     gpio_hold_dis(gpio_num_t(RFID_CS)); // NSS
-     gpio_hold_dis(gpio_num_t(RFID_RST)); // RST
+        // disable pin hold from deep sleep
+        gpio_deep_sleep_hold_dis();
+        gpio_hold_dis(gpio_num_t(RFID_CS)); // NSS
+        gpio_hold_dis(gpio_num_t(RFID_RST)); // RST
    #endif
-  // show SD card type
+    // show SD card type
     #ifdef SD_MMC_1BIT_MODE
-      loggerNl(serialDebug, (char *) FPSTR(sdMountedMmc1BitMode), LOGLEVEL_NOTICE);
-      uint8_t cardType = SD_MMC.cardType();
+        loggerNl(serialDebug, (char *) FPSTR(sdMountedMmc1BitMode), LOGLEVEL_NOTICE);
+        uint8_t cardType = SD_MMC.cardType();
     #else
-      loggerNl(serialDebug, (char *) FPSTR(sdMountedSpiMode), LOGLEVEL_NOTICE);
-      uint8_t cardType = SD.cardType();
+        loggerNl(serialDebug, (char *) FPSTR(sdMountedSpiMode), LOGLEVEL_NOTICE);
+        uint8_t cardType = SD.cardType();
     #endif
     Serial.print(F("SD card type: "));
     if (cardType == CARD_MMC) {
@@ -4660,7 +4727,7 @@ void setup() {
 
     #ifdef HEADPHONE_ADJUST_ENABLE
         pinMode(HP_DETECT, INPUT);
-        headphoneLastDetectionState = digitalRead(HP_DETECT);
+        headphoneLastDetectionState = digitalReadFromAll(HP_DETECT);
     #endif
 
     // Create queues
@@ -4898,7 +4965,7 @@ void setup() {
     timerSemaphore = xSemaphoreCreateBinary();
     timer = timerBegin(0, 240, true);           // Prescaler: CPU-clock in MHz
     timerAttachInterrupt(timer, &onTimer, true);
-    timerAlarmWrite(timer, 1000, true);         // 1000 Hz
+    timerAlarmWrite(timer, 10000, true);        // 100 Hz
     timerAlarmEnable(timer);
 
     // Create tasks
@@ -5050,7 +5117,6 @@ void loop() {
         batteryVoltageTester();
     #endif
     buttonHandler();
-    doButtonActions();
     sleepHandler();
     deepSleepManager();
     rfidPreferenceLookupHandler();

src/settings-custom.h

@@ -49,18 +49,25 @@
     #ifdef USEROTARY_ENABLE
         #define DREHENCODER_CLK             34          // If you want to reverse encoder's direction, just switch GPIOs of CLK with DT (in software or hardware)
         #define DREHENCODER_DT              35          // Info: Lolin D32 / Lolin D32 pro 35 are using 35 for battery-voltage-monitoring!
-        #define DREHENCODER_BUTTON          32          // Button 3: is used to switch ESPuino on and off
+        #define DREHENCODER_BUTTON          32          // (set to 99 to disable; 0->39 for GPIO; 100->115 for port-expander)
     #endif
 
-    // Control-buttons (set to 99 to disable)
+    // Control-buttons (set to 99 to DISABLE; 0->39 for GPIO; 100->115 for port-expander)
     #define NEXT_BUTTON                      4          // Button 0: GPIO to detect next
     #define PREVIOUS_BUTTON                  2          // Button 1: GPIO to detect previous (Important: as of 19.11.2020 changed from 33 to 2; make sure to change in SD-MMC-mode)
     #define PAUSEPLAY_BUTTON                 0          // Button 2: GPIO to detect pause/play
     #define BUTTON_4                        99          // Button 4: unnamed optional button
     #define BUTTON_5                        99          // Button 5: unnamed optional button
 
-    // Wake-up button
-    // Please note: only RTC-GPIOs (0, 4, 12, 13, 14, 15, 25, 26, 27, 32, 33, 34, 35, 36, 39, 99) can be used! Set to 99 to disable.
+    // I2C-configuration (necessary for RC522 [only via i2c - not spi!] or port-expander)
+    #if defined(RFID_READER_TYPE_MFRC522_I2C) || defined(PORT_EXPANDER_ENABLE)
+        #define ext_IIC_CLK                 4           // i2c-SCL (clock)
+        #define ext_IIC_DATA                2           // i2c-SDA (data)
+    #endif
+
+    // Wake-up button => this also is the interrupt-pin if port-expander is enabled!
+    // Please note: only RTC-GPIOs (0, 4, 12, 13, 14, 15, 25, 26, 27, 32, 33, 34, 35, 36, 39, 99) can be used! Set to 99 to DISABLE.
+    // Please note #2: this button can be used as interrupt-pin for port-expander. If so, all pins connected to port-expander can wake up ESPuino.
     #define WAKEUP_BUTTON                   DREHENCODER_BUTTON // Defines the button that is used to wake up ESPuino from deepsleep.
 
     // (optional) Power-control

src/settings-espa1s.h

@@ -43,18 +43,25 @@
     #ifdef USEROTARY_ENABLE
         #define DREHENCODER_CLK              5          // If you want to reverse encoder's direction, just switch GPIOs of CLK with DT (in software or hardware)
         #define DREHENCODER_DT              18          // Info: Lolin D32 / Lolin D32 pro 35 are using 35 for battery-voltage-monitoring!
-        #define DREHENCODER_BUTTON           4          // Button 3: is used to switch ESPuino on and off
+        #define DREHENCODER_BUTTON           4          // (set to 99 to disable; 0->39 for GPIO; 100->115 for port-expander)
     #endif
 
-    // Control-buttons (set to 99 to disable)
+    // Control-buttons (set to 99 to DISABLE; 0->39 for GPIO; 100->115 for port-expander)
     #define NEXT_BUTTON                    199          // Button 0: GPIO to detect next
     #define PREVIOUS_BUTTON                198          // Button 1: GPIO to detect previous (Important: as of 19.11.2020 changed from 33 to 2; make sure to change in SD-MMC-mode)
     #define PAUSEPLAY_BUTTON                36          // Button 2: GPIO to detect pause/play
     #define BUTTON_4                        99          // Button 4: unnamed optional button
     #define BUTTON_5                        99          // Button 5: unnamed optional button
 
-    // Wake-up button
-    // Please note: only RTC-GPIOs (0, 4, 12, 13, 14, 15, 25, 26, 27, 32, 33, 34, 35, 36, 39, 99) can be used! Set to 99 to disable.
+    // I2C-configuration (necessary for RC522 [only via i2c - not spi!] or port-expander)
+    #if defined(RFID_READER_TYPE_MFRC522_I2C) || defined(PORT_EXPANDER_ENABLE)
+        #define ext_IIC_CLK                 5           // i2c-SCL (clock)
+        #define ext_IIC_DATA                2           // i2c-SDA (data)
+    #endif
+
+    // Wake-up button => this also is the interrupt-pin if port-expander is enabled!
+    // Please note: only RTC-GPIOs (0, 4, 12, 13, 14, 15, 25, 26, 27, 32, 33, 34, 35, 36, 39, 99) can be used! Set to 99 to DISABLE.
+    // Please note #2: this button can be used as interrupt-pin for port-expander. If so, all pins connected to port-expander can wake up ESPuino.
     #define WAKEUP_BUTTON                   DREHENCODER_BUTTON // Defines the button that is used to wake up ESPuino from deepsleep.
 
     // Power-control

src/settings-lolin32.h

@@ -53,18 +53,25 @@
 #ifdef USEROTARY_ENABLE
     #define DREHENCODER_CLK             34          // If you want to reverse encoder's direction, just switch GPIOs of CLK with DT (in software or hardware)
     #define DREHENCODER_DT              35          // Info: Lolin D32 / Lolin D32 pro 35 are using 35 for battery-voltage-monitoring!
-    #define DREHENCODER_BUTTON          32          // Button 3: is used to switch ESPuino on and off
+    #define DREHENCODER_BUTTON          32          // (set to 99 to disable; 0->39 for GPIO; 100->115 for port-expander)
 #endif
 
-// Control-buttons (set to 99 to disable)
+// Control-buttons (set to 99 to DISABLE; 0->39 for GPIO; 100->115 for port-expander)
 #define NEXT_BUTTON                      4          // Button 0: GPIO to detect next
 #define PREVIOUS_BUTTON                  2          // Button 1: GPIO to detect previous (Important: as of 19.11.2020 changed from 33 to 2; make sure to change in SD-MMC-mode)
 #define PAUSEPLAY_BUTTON                 5          // Button 2: GPIO to detect pause/play
 #define BUTTON_4                        99          // Button 4: unnamed optional button
 #define BUTTON_5                        99          // Button 5: unnamed optional button
 
-// Wake-up button
-// Please note: only RTC-GPIOs (0, 4, 12, 13, 14, 15, 25, 26, 27, 32, 33, 34, 35, 36, 39, 99) can be used! Set to 99 to disable.
+// I2C-configuration (necessary for RC522 [only via i2c - not spi!] or port-expander)
+#if defined(RFID_READER_TYPE_MFRC522_I2C) || defined(PORT_EXPANDER_ENABLE)
+    #define ext_IIC_CLK                 5           // i2c-SCL (clock)
+    #define ext_IIC_DATA                2           // i2c-SDA (data)
+#endif
+
+// Wake-up button => this also is the interrupt-pin if port-expander is enabled!
+// Please note: only RTC-GPIOs (0, 4, 12, 13, 14, 15, 25, 26, 27, 32, 33, 34, 35, 36, 39, 99) can be used! Set to 99 to DISABLE.
+// Please note #2: this button can be used as interrupt-pin for port-expander. If so, all pins connected to port-expander can wake up ESPuino.
 #define WAKEUP_BUTTON                   DREHENCODER_BUTTON // Defines the button that is used to wake up ESPuino from deepsleep.
 
 // (optional) Power-control

src/settings-lolin_d32.h

@@ -56,18 +56,25 @@
     #ifdef USEROTARY_ENABLE
         #define DREHENCODER_CLK             34          // If you want to reverse encoder's direction, just switch GPIOs of CLK with DT (in software or hardware)
         #define DREHENCODER_DT              33          // Info: Lolin D32 is using 35 for battery-voltage-monitoring!
-        #define DREHENCODER_BUTTON          32          // Button is used to switch ESPuino on and off
+        #define DREHENCODER_BUTTON          32          // (set to 99 to disable; 0->39 for GPIO; 100->115 for port-expander)
     #endif
 
-    // Control-buttons (set to 99 to disable)
+// Control-buttons (set to 99 to DISABLE; 0->39 for GPIO; 100->115 for port-expander)
     #define NEXT_BUTTON                      4          // Button 0: GPIO to detect next
     #define PREVIOUS_BUTTON                  2          // Button 1: GPIO to detect previous (Important: as of 19.11.2020 changed from 33 to 2; make sure to change in SD-MMC-mode)
     #define PAUSEPLAY_BUTTON                 5          // Button 2: GPIO to detect pause/play
     #define BUTTON_4                        99          // Button 4: unnamed optional button
     #define BUTTON_5                        99          // Button 5: unnamed optional button
 
-    // Wake-up button
-    // Please note: only RTC-GPIOs (0, 4, 12, 13, 14, 15, 25, 26, 27, 32, 33, 34, 35, 36, 39, 99) can be used! Set to 99 to disable.
+    // I2C-configuration (necessary for RC522 [only via i2c - not spi!] or port-expander)
+    #if defined(RFID_READER_TYPE_MFRC522_I2C) || defined(PORT_EXPANDER_ENABLE)
+        #define ext_IIC_CLK                 5           // i2c-SCL (clock)
+        #define ext_IIC_DATA                2           // i2c-SDA (data)
+    #endif
+
+    // Wake-up button => this also is the interrupt-pin if port-expander is enabled!
+    // Please note: only RTC-GPIOs (0, 4, 12, 13, 14, 15, 25, 26, 27, 32, 33, 34, 35, 36, 39, 99) can be used! Set to 99 to DISABLE.
+    // Please note #2: this button can be used as interrupt-pin for port-expander. If so, all pins connected to port-expander can wake up ESPuino.
     #define WAKEUP_BUTTON                   DREHENCODER_BUTTON // Defines the button that is used to wake up ESPuino from deepsleep.
 
     // (optional) Power-control

src/settings-lolin_d32_pro.h

@@ -51,18 +51,25 @@
     #ifdef USEROTARY_ENABLE
         #define DREHENCODER_CLK             34          // If you want to reverse encoder's direction, just switch GPIOs of CLK with DT (in software or hardware)
         #define DREHENCODER_DT              39          // 39 = 'VN'; Info: Lolin D32 pro is using 35 for battery-voltage-monitoring!
-        #define DREHENCODER_BUTTON          36          // Button 3: is used to switch ESPuino on and off; 36 = 'VP'
+        #define DREHENCODER_BUTTON          36          // (set to 99 to disable; 0->39 for GPIO; 100->115 for port-expander)
     #endif
 
-    // Control-buttons (set to 99 to disable)
+    // Control-buttons (set to 99 to DISABLE; 0->39 for GPIO; 100->115 for port-expander)
     #define NEXT_BUTTON                      0          // Button 0: GPIO to detect next
     #define PREVIOUS_BUTTON                  2          // Button 1: GPIO to detect previous (Important: as of 19.11.2020 changed from 33 to 2; make sure to change in SD-MMC-mode)
     #define PAUSEPLAY_BUTTON                32          // Button 2: GPIO to detect pause/play
     #define BUTTON_4                        99          // Button 4: unnamed optional button
     #define BUTTON_5                        99          // Button 5: unnamed optional button
 
-    // Wake-up button
-    // Please note: only RTC-GPIOs (0, 4, 12, 13, 14, 15, 25, 26, 27, 32, 33, 34, 35, 36, 39, 99) can be used! Set to 99 to disable.
+    // I2C-configuration (necessary for RC522 [only via i2c - not spi!] or port-expander)
+    #if defined(RFID_READER_TYPE_MFRC522_I2C) || defined(PORT_EXPANDER_ENABLE)
+        #define ext_IIC_CLK                 5           // i2c-SCL (clock)
+        #define ext_IIC_DATA                2           // i2c-SDA (data)
+    #endif
+
+    // Wake-up button => this also is the interrupt-pin if port-expander is enabled!
+    // Please note: only RTC-GPIOs (0, 4, 12, 13, 14, 15, 25, 26, 27, 32, 33, 34, 35, 36, 39, 99) can be used! Set to 99 to DISABLE.
+    // Please note #2: this button can be used as interrupt-pin for port-expander. If so, all pins connected to port-expander can wake up ESPuino.
     #define WAKEUP_BUTTON                   DREHENCODER_BUTTON // Defines the button that is used to wake up ESPuino from deepsleep.
 
     // (optional) Power-control

src/settings-ttgo_t8.h

@@ -51,18 +51,25 @@
 #ifdef USEROTARY_ENABLE
     #define DREHENCODER_CLK             34          // If you want to reverse encoder's direction, just switch GPIOs of CLK with DT (in software or hardware)
     #define DREHENCODER_DT              33          // Info: Lolin D32 / Lolin D32 pro 35 are using 35 for battery-voltage-monitoring!
-    #define DREHENCODER_BUTTON          32          // Button 3: is used to switch ESPuino on and off
+    #define DREHENCODER_BUTTON          32          // (set to 99 to disable; 0->39 for GPIO; 100->115 for port-expander)
 #endif
 
-// Control-buttons (set to 99 to disable)
+// Control-buttons (set to 99 to DISABLE; 0->39 for GPIO; 100->115 for port-expander)
 #define NEXT_BUTTON                      0          // Button 0: GPIO to detect next
 #define PREVIOUS_BUTTON                 36          // Button 1: GPIO to detect previous (Important: as of 19.11.2020 changed from 33 to 2; make sure to change in SD-MMC-mode)
 #define PAUSEPLAY_BUTTON                39          // Button 2: GPIO to detect pause/play
 #define BUTTON_4                        99          // Button 4: unnamed optional button
 #define BUTTON_5                        99          // Button 5: unnamed optional button
 
-// Wake-up button
-// Please note: only RTC-GPIOs (0, 4, 12, 13, 14, 15, 25, 26, 27, 32, 33, 34, 35, 36, 39, 99) can be used! Set to 99 to disable.
+// I2C-configuration (necessary for RC522 [only via i2c - not spi!] or port-expander)
+#if defined(RFID_READER_TYPE_MFRC522_I2C) || defined(PORT_EXPANDER_ENABLE)
+    #define ext_IIC_CLK                 5           // i2c-SCL (clock)
+    #define ext_IIC_DATA                2           // i2c-SDA (data)
+#endif
+
+// Wake-up button => this also is the interrupt-pin if port-expander is enabled!
+// Please note: only RTC-GPIOs (0, 4, 12, 13, 14, 15, 25, 26, 27, 32, 33, 34, 35, 36, 39, 99) can be used! Set to 99 to DISABLE.
+// Please note #2: this button can be used as interrupt-pin for port-expander. If so, all pins connected to port-expander can wake up ESPuino.
 #define WAKEUP_BUTTON                   DREHENCODER_BUTTON // Defines the button that is used to wake up ESPuino from deepsleep.
 
 // (optional) Power-control

src/settings.h

@@ -21,6 +21,7 @@
 
 
     //########################## MODULES #################################
+    //#define PORT_EXPANDER_ENABLE          // When enabled, buttons can be connected via port-expander PCA9555
     #define MDNS_ENABLE                     // When enabled, you don't have to handle with ESPuino's IP-address. If hostname is set to "ESPuino", you can reach it via ESPuino.local
     #define MQTT_ENABLE                     // Make sure to configure mqtt-server and (optionally) username+pwd
     #define FTP_ENABLE                      // Enables FTP-server; DON'T FORGET TO ACTIVATE AFTER BOOT BY PRESSING PAUSE + NEXT-BUTTONS (IN PARALLEL)!
@@ -57,6 +58,12 @@
     #endif
 
 
+    //############# Port-expander-configuration ######################
+    #ifdef PORT_EXPANDER_ENABLE
+        const uint8_t portsToRead = 2;      // PCA9555 has two ports à 8 channels. If 8 channels are sufficient, set to 1 and only use the first port!
+        uint8_t expanderI2cAddress = 0x20;  // I2C-address of PCA9555
+    #endif
+
     //################## BUTTON-Layout ##################################
     /* German documentation: https://forum.espuino.de/t/das-dynamische-button-layout/224
     Please note the following numbers as you need to know them in order to define actions for buttons.