ESP8266 ESP32 compatible

README.adoc

@@ -8,6 +8,7 @@ image:https://github.com/{repository-owner}/{repository-name}/actions/workflows/
 image:https://github.com/{repository-owner}/{repository-name}/actions/workflows/spell-check.yml/badge.svg["Spell Check status", link="https://github.com/{repository-owner}/{repository-name}/actions/workflows/spell-check.yml"]
 
 Enables sending and receiving data using the RS-485 standard with RS-485 shields, like the MKR 485 Shield.
+I've Made this compatible with ESP8266 and ESP32.
 
 This library supports the Maxim Integrated MAX3157 and equivalent chipsets.
 

library.properties

@@ -1,5 +1,5 @@
 name=ArduinoRS485
-version=1.0.2
+version=1.0.61
 author=Arduino
 maintainer=Arduino <[email protected]>
 sentence=Enables sending and receiving data using the RS-485 standard with RS-485 shields, like the MKR 485 Shield.

src/RS485.cpp

@@ -38,12 +38,12 @@ void RS485Class::begin(unsigned long baudrate, int predelay, int postdelay)
   begin(baudrate, SERIAL_8N1, predelay, postdelay);
 }
 
-void RS485Class::begin(unsigned long baudrate, uint16_t config)
+void RS485Class::begin(unsigned long baudrate, RS485_SER_CONF_TYPE config)
 {
   begin(baudrate, config, RS485_DEFAULT_PRE_DELAY, RS485_DEFAULT_POST_DELAY);
 }
 
-void RS485Class::begin(unsigned long baudrate, uint16_t config, int predelay, int postdelay)
+void RS485Class::begin(unsigned long baudrate, RS485_SER_CONF_TYPE config, int predelay, int postdelay)
 {
   _baudrate = baudrate;
   _config = config;
@@ -137,6 +137,11 @@ void RS485Class::endTransmission()
   }
 
   _transmisionBegun = false;
+#ifdef ESP32
+  // there is a bug in ESP32 for Serial2
+  while(_serial->available())
+    _serial->read();
+#endif
 }
 
 void RS485Class::receive()

src/RS485.h

@@ -21,33 +21,17 @@
 #define _RS485_H_INCLUDED
 
 #include <Arduino.h>
+#include "RS485_defs.h"
 
-#ifdef PIN_SERIAL1_TX
-#define RS485_DEFAULT_TX_PIN PIN_SERIAL1_TX
-#else
-#define RS485_DEFAULT_TX_PIN 1 
-#endif
-
-#ifdef __AVR__
-#define RS485_DEFAULT_DE_PIN 2
-#define RS485_DEFAULT_RE_PIN -1
-#else
-#define RS485_DEFAULT_DE_PIN A6
-#define RS485_DEFAULT_RE_PIN A5
-#endif
-
-
-#define RS485_DEFAULT_PRE_DELAY 50
-#define RS485_DEFAULT_POST_DELAY 50
 
 class RS485Class : public Stream {
   public:
     RS485Class(HardwareSerial& hwSerial, int txPin, int dePin, int rePin);
 
     virtual void begin(unsigned long baudrate);
-    virtual void begin(unsigned long baudrate, uint16_t config);
+    virtual void begin(unsigned long baudrate, RS485_SER_CONF_TYPE config);
     virtual void begin(unsigned long baudrate, int predelay, int postdelay);
-    virtual void begin(unsigned long baudrate, uint16_t config, int predelay, int postdelay);
+    virtual void begin(unsigned long baudrate, RS485_SER_CONF_TYPE config, int predelay, int postdelay);
     virtual void end();
     virtual int available();
     virtual int peek();
@@ -79,7 +63,7 @@ class RS485Class : public Stream {
 
     bool _transmisionBegun;
     unsigned long _baudrate;
-    uint16_t _config;
+    RS485_SER_CONF_TYPE _config;
 };
 
 extern RS485Class RS485;

src/RS485_defs.h

@@ -0,0 +1,38 @@
+#ifndef _ARDUINO_RS485_DEFS_H_INCLUDED
+#define _ARDUINO_RS485_DEFS_H_INCLUDED
+
+#ifndef RS485_DEFAULT_TX_PIN
+#ifdef PIN_SERIAL1_TX
+#define RS485_DEFAULT_TX_PIN PIN_SERIAL1_TX
+#else
+#define RS485_DEFAULT_TX_PIN 1
+#endif
+#endif
+
+#ifdef __AVR__
+#define RS485_DEFAULT_DE_PIN 2
+#define RS485_DEFAULT_RE_PIN -1
+#elif defined(ESP32) || defined(ESP8266)
+#ifndef RS485_DEFAULT_DE_PIN
+#define RS485_DEFAULT_DE_PIN 0
+#endif
+#ifndef RS485_DEFAULT_RE_PIN
+#define RS485_DEFAULT_RE_PIN 0
+#endif
+#else
+#define RS485_DEFAULT_DE_PIN A6
+#define RS485_DEFAULT_RE_PIN A5
+#endif
+
+#if defined(ESP8266)
+#define RS485_SER_CONF_TYPE SerialConfig
+#elif defined(ESP32)
+#define RS485_SER_CONF_TYPE uint32_t
+#else
+#define RS485_SER_CONF_TYPE uint16_t
+#endif
+
+#define RS485_DEFAULT_PRE_DELAY 50
+#define RS485_DEFAULT_POST_DELAY 50
+
+#endif