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Add SoftwareSerial support for RS485 transport #1510

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Add SoftwareSerial support for RS485 transport #1510

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1f3dfa3
Allow using SoftwareSerial for RS485
kasparsd Oct 29, 2021
eda91c6
Document the new flag
kasparsd Oct 29, 2021
e3f723c
Describe the SoftwareSerial usage in the RS485 example too
kasparsd Oct 29, 2021
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1 change: 1 addition & 0 deletions MyConfig.h
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Original file line number Diff line number Diff line change
Expand Up @@ -2440,6 +2440,7 @@
#define MY_RS485_DE_PIN
#define MY_RS485_DE_INVERSE
#define MY_RS485_HWSERIAL
#define MY_RS485_SOFTWARESERIAL
// PJON
#define MY_PJON
#define MY_DEBUG_VERBOSE_PJON
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2 changes: 2 additions & 0 deletions MySensors.h
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Expand Up @@ -373,8 +373,10 @@ MY_DEFAULT_RX_LED_PIN in your sketch instead to enable LEDs
#if defined(__linux__)
#error You must specify MY_RS485_HWSERIAL for RS485 transport
#endif
#if !defined(MY_RS485_SOFTWARESERIAL)
#include "drivers/AltSoftSerial/AltSoftSerial.cpp"
#endif
#endif
#include "hal/transport/RS485/MyTransportRS485.cpp"
#elif defined(MY_RADIO_RFM69)
#if defined(MY_RFM69_NEW_DRIVER)
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7 changes: 7 additions & 0 deletions examples/GatewaySerialRS485/GatewaySerialRS485.ino
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Expand Up @@ -34,6 +34,8 @@
*
* If your Arduino board has additional serial ports
* you can use to connect the RS485 module.
* Alternatively, use the Arduino SoftwareSerial library to use any of the supported
* GPIO pins for communicating with the RS485 module.
* Otherwise, the gateway uses AltSoftSerial to handle two serial
* links on one Arduino. Use the following pins for RS485 link
*
Expand Down Expand Up @@ -65,6 +67,11 @@
// Enable this if RS485 is connected to a hardware serial port
//#define MY_RS485_HWSERIAL Serial1

// Enable if using SoftwareSerial to communicate with RS485 transceivers.
// #include <SoftwareSerial.h>
// SoftwareSerial RS485SoftwareSerial(D1, D2); // RX, TX
// #define MY_RS485_SOFTWARESERIAL RS485SoftwareSerial

// Enable serial gateway
#define MY_GATEWAY_SERIAL

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2 changes: 2 additions & 0 deletions hal/transport/RS485/MyTransportRS485.cpp
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Expand Up @@ -88,6 +88,8 @@ unsigned char _recCalcCS;

#if defined(__linux__)
SerialPort _dev = SerialPort(MY_RS485_HWSERIAL);
#elif defined(MY_RS485_SOFTWARESERIAL)
SoftwareSerial& _dev = MY_RS485_SOFTWARESERIAL;
#elif defined(MY_RS485_HWSERIAL)
HardwareSerial& _dev = MY_RS485_HWSERIAL;
#else
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1 change: 1 addition & 0 deletions keywords.txt
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Expand Up @@ -236,6 +236,7 @@ MY_RS485_BAUD_RATE LITERAL1
MY_RS485_DE_PIN LITERAL1
MY_RS485_DE_INVERSE LITERAL1
MY_RS485_HWSERIAL LITERAL1
MY_RS485_SOFTWARESERIAL LITERAL1
MY_RS485_MAX_MESSAGE_LENGTH LITERAL1
MY_RS485_SOH_COUNT LITERAL1

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