1. Arduino Softwareserial Library Download
2. Arduino Softserial Library Download
3. New Softwareserial Library Download
4. Softwareserial Arduino Library Download
5. Esp32 Software Serial Library Download

So, that additional serial port must be programmed using softwareserial.h library. If the hardwareserial library can not be used because you need to use a communication protocol that needs the use of a physical UART instead of a virtual serial port. Then, you could convert the standard RS232 or RS485 from the device to a Serial TTL. GitHub is where the world builds software. Millions of developers and companies build, ship, and maintain their software on GitHub — the largest and most advanced development platform in the world. SoftwareSerial is a library that enables serial communication with a digital pin other than the serial port. It is possible to have multiple software serial ports with speeds up to 115200bps. However, be careful when the baud rate is 115200bps because the reception latch timing is not so accurate. The receive buffer is fixed at 256 bytes. With 3 hardware serial ports on the Maple, it is unlikely that SoftwareSerial would be needed until one realizes that some Arduino libraries (Adafruit’s GPS, for example) inherit from SoftwareSerial. If you are just out for a day’s playing, modifying the GPS library may not be something you really wish to do. SoftwareSerial read print println Reference Home. Corrections, suggestions, and new documentation should be posted to the Forum. The text of the Arduino reference is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain. Both of these libraries are available from the Arduino Library Manager, under the menu Sketch- Include Library- Manage Libraries. SoftwareSerial is very inefficient, because it disables interrupts for long periods of time. It cannot send and receive at the same time.

1. SoftwareSerial.h (formerly NewSoftSerial.h) -
2. Multi-instance software serial library for Arduino/Wiring
3. -- Interrupt-driven receive and other improvements by ladyada
4. -- Tuning, circular buffer, derivation from class Print/Stream,
5. multi-instance support, porting to 8MHz processors,
6. various optimizations, PROGMEM delay tables, inverse logic and
7. direct port writing by Mikal Hart (http://www.arduiniana.org)
8. -- Pin change interrupt macros by Paul Stoffregen (http://www.pjrc.com)
9. -- 20MHz processor support by Garrett Mace (http://www.macetech.com)
10. -- ATmega1280/2560 support by Brett Hagman (http://www.roguerobotics.com/)
11. This library is free software; you can redistribute it and/or
12. modify it under the terms of the GNU Lesser General Public
13. License as published by the Free Software Foundation; either
14. version 2.1 of the License, or (at your option) any later version.
15. This library is distributed in the hope that it will be useful,
16. but WITHOUT ANY WARRANTY; without even the implied warranty of
17. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18. You should have received a copy of the GNU Lesser General Public
19. License along with this library; if not, write to the Free Software
20. Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21. The latest version of this library can always be found at
22. */
23. #ifndef SoftwareSerial_h
24. #include <Stream.h>
25. /******************************************************************************
26. ******************************************************************************/
27. #define _SS_MAX_RX_BUFF 64 // RX buffer size
28. #define GCC_VERSION (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__)
29. {
30. // per object data
31. uint8_t _receiveBitMask;
32. uint8_t _transmitBitMask;
33. uint16_t _rx_delay_intrabit;
34. uint16_t _tx_delay;
35. uint16_t _buffer_overflow:1;
36. staticchar _receive_buffer[_SS_MAX_RX_BUFF];
37. staticvolatileuint8_t _receive_buffer_head;
38. void recv();
39. void tx_pin_write(uint8_t pin_state);
40. void setRX(uint8_t receivePin);
41. // private static method for timing
42. // public methods
43. SoftwareSerial(uint8_t receivePin,uint8_t transmitPin, bool inverse_logic =false);
44. void begin(long speed);
45. void end();
46. bool isListening(){return this active_object;}
47. bool overflow(){ bool ret = _buffer_overflow; _buffer_overflow =false;return ret;}
48. virtual int read();
49. virtual void flush();
50. using Print::write;
51. // public only for easy access by interrupt handlers
52. };
53. // Arduino 0012 workaround
54. #undef char
55. #undef byte
56. #undef abs

In certain cases we need to use more than one Serial port in the case of arduino, I use the arduino mega 2560 which has 4 serial ports including the programming port, in the case of arduino’s as the nano has a single programming port and as a solution Have created the softwareserial library, given the incompatibility of certain functions the softwareserial library for arduinodoes not work on esp8266.

Softwareserial Library

I have tested with ESP8266 NodeMCU and SoftwareSerial library of the espsoftwareserial repository created or supplied by plerupthanks for your contribution to the community.

Recommendations

In the case that these libraries that create a uart in code must be taken into account that at high speeds it is possible to have bit errors since they use interrupts and the microcontroller you are in many tasks at a time, in my case and the tests that I have I configured the port at Maximo 9600 Bauds, it is a relatively low speed but I consider it to be safe.

Arduino Softwareserial Library Download

Test

To verify the operation of the softwareserial library, I downloaded the library for espand I have temporarily replaced the serial software version for arduino.

Tutorial ESP8266 12E NodeMCU & SoftwareSerial

Arduino IDE Code

This test creates a bridge between the 2 serial ports.