Initial commit

2026-03-31 13:17:21 +02:00
commit 7eeecff042
6821 changed files with 3514215 additions and 0 deletions
--- a/library/examples/ledEsp32OnTheSecondI2C/ledEsp32OnTheSecondI2C.ino
+++ b/library/examples/ledEsp32OnTheSecondI2C/ledEsp32OnTheSecondI2C.ino
@@ -0,0 +1,66 @@
+#include "Arduino.h"
+/*
+ * 	PCF8575 GPIO Port Expand
+ *  Blink all led
+ *  by Mischianti Renzo <http://www.mischianti.org>
+ *
+ *  https://www.mischianti.org/2019/01/02/pcf8575-i2c-digital-i-o-expander-fast-easy-usage/
+ *
+ *
+ * PCF8575    ----- Esp32
+ * A0         ----- GRD
+ * A1         ----- GRD
+ * A2         ----- GRD
+ * VSS        ----- GRD
+ * VDD        ----- 5V/3.3V
+ * SDA        ----- 21
+ * SCL        ----- 22
+ *
+ * P0     ----------------- LED0
+ * P1     ----------------- LED1
+ * P2     ----------------- LED2
+ * P3     ----------------- LED3
+ * P4     ----------------- LED4
+ * P5     ----------------- LED5
+ * P6     ----------------- LED6
+ * P7     ----------------- LED7
+ *
+ */
+
+#include "Arduino.h"
+#include "PCF8575.h"  // https://github.com/xreef/PCF8575_library
+
+// Instantiate Wire for generic use at 400kHz
+TwoWire I2Cone = TwoWire(0);
+// Instantiate Wire for generic use at 100kHz
+TwoWire I2Ctwo = TwoWire(1);
+
+// Set i2c address
+PCF8575 pcf8575(&I2Ctwo, 0x20);
+// PCF8575 pcf8575(&I2Ctwo, 0x20, 21, 22);
+// PCF8575(TwoWire *pWire, uint8_t address, uint8_t interruptPin,  void (*interruptFunction)() );
+// PCF8575(TwoWire *pWire, uint8_t address, uint8_t sda, uint8_t scl, uint8_t interruptPin,  void (*interruptFunction)());
+
+void setup()
+{
+  Serial.begin(112560);
+
+  I2Cone.begin(16,17,400000); // SDA pin 16, SCL pin 17, 400kHz frequency
+
+  // Set pinMode to OUTPUT
+  for(int i=0;i<8;i++) {
+    pcf8575.pinMode(i, OUTPUT);
+  }
+  pcf8575.begin();
+}
+
+void loop()
+{
+  static int pin = 0;
+  pcf8575.digitalWrite(pin, HIGH);
+  delay(400);
+  pcf8575.digitalWrite(pin, LOW);
+  delay(400);
+  pin++;
+  if (pin > 7) pin = 0;
+}