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Signed-off-by: Stephan Richter <s.richter@srsoftware.de>
This commit is contained in:
Stephan Richter
2023-11-20 00:35:03 +01:00
parent 6cd774b00a
commit 3bb87bad44
6 changed files with 107 additions and 104 deletions
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58
examples/LCDReceive/LCDReceive.ino
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@@ -1,51 +1,15 @@
/*
LiquidCrystal Library - Hello World
Demonstrates the use a 16x2 LCD display. The LiquidCrystal
library works with all LCD displays that are compatible with the
Hitachi HD44780 driver. There are many of them out there, and you
can usually tell them by the 16-pin interface.
This sketch prints "Hello World!" to the LCD
and shows the time.
The circuit:
* LCD RS pin to digital pin 12
* LCD Enable pin to digital pin 11
* LCD D4 pin to digital pin 5
* LCD D5 pin to digital pin 4
* LCD D6 pin to digital pin 3
* LCD D7 pin to digital pin 2
* LCD R/W pin to ground
* LCD VSS pin to ground
* LCD VCC pin to 5V
* 10K resistor:
* ends to +5V and ground
* wiper to LCD VO pin (pin 3)
Library originally added 18 Apr 2008
by David A. Mellis
library modified 5 Jul 2009
by Limor Fried (http://www.ladyada.net)
example added 9 Jul 2009
by Tom Igoe
modified 22 Nov 2010
by Tom Igoe
modified 7 Nov 2016
by Arturo Guadalupi
This example code is in the public domain.
http://www.arduino.cc/en/Tutorial/LiquidCrystalHelloWorld
*/
/*
* Demonstrates how to use LCDisplay in conjunction with SoftRS485:
*
* The main _loop_ of this program listens on the RS485 bus.
* Whenever a message is received from the bus, it is displayed on the LCD.
*/
// include the library code:
#include <LiquidCrystal.h>
#include <SoftRS485.h>
// initialize the library by associating any needed LCD interface pin
// with the arduino pin number it is connected to
// initialize the library by associating any needed LCD interface pin with the arduino pin number it is connected to
const int rs = 12, en = 11, d4 = 4, d5 = 5, d6 = 6, d7 = 7;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
@@ -54,7 +18,7 @@ void setup() {
// set up the LCD's number of columns and rows:
lcd.begin(16, 2);
// Print a message to the LCD.
lcd.print("hello, world!");
lcd.print("LCDReceive 1.0");
init485(2,3,8,9); // library initialization:
// connect pin 2 to RO of Max485
// connect pin 3 to ^RE of Max485
@@ -62,12 +26,10 @@ void setup() {
// connect pin 9 to DI of Max485
}
void loop() {
void loop() {
if (available485()) {
// set the cursor to column 0, line 1
// (note: line 1 is the second row, since counting begins with 0):
String s = get485message();
Serial.println(s);
lcd.clear();
lcd.setCursor(0, 0);
lcd.print(s);

2
examples/ReceiveDemo/ReceiveDemo.ino
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@@ -1,6 +1,6 @@
/*
This sketch demonstrates, how to use the SoftRS485 library.
This library makes use of Arduinos timer 1
It listens on the bus and echoes incoming messages to the serial console.
*/
#include <SoftRS485.h>

33
examples/SendButton/SendButton.ino
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@@ -1,33 +0,0 @@
/*
This sketch demonstrates, how to use the SoftRS485 library.
This library makes use of Arduinos timer 1
*/
#include <SoftRS485.h>
const int buttonPin = 10; // the number of the pushbutton pin
boolean button_state = true;
void setup() {
Serial.begin(115200);
init485(2,3,4,5); // library initialization:
// connect pin 2 to RO of Max485
// connect pin 3 to ^RE of Max485
// connect pin 4 to DE of Max485
// connect pin 5 to DI of Max485
pinMode(buttonPin, INPUT_PULLUP);
}
void loop(){
boolean new_state = digitalRead(buttonPin);
if (new_state != button_state){
button_state = new_state;
if (new_state == LOW){
send485("Button pressed");
} else {
send485("Button released");
}
}
}

39
examples/SendOnButton/SendOnButton.ino Normal file
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@@ -0,0 +1,39 @@
/*
This sketch demonstrates, how to use the SoftRS485 library.
It listens on the RS485 network bus.
When the button is pressed, it sends some messages on the bus.
*/
#include <SoftRS485.h>
#define BUTTON 7
boolean state = LOW;
void setup() {
Serial.begin(115200);
Serial.println(F("This is ReceiveDemo, version 0.1"));
init485(2,3,4,5); // library initialization:
// connect pin 2 to RO of Max485
// connect pin 3 to ^RE of Max485
// connect pin 4 to DE of Max485
// connect pin 5 to DI of Max485
pinMode(BUTTON,INPUT_PULLUP);
}
void loop(){
if (available485()) Serial.println("Received: "+get485message());
boolean new_state = digitalRead(BUTTON);
if (new_state != state){
if (state){
for (int i=1; i<16; i++){
String s = "Button pressed "+String(i);
send485(s.c_str());
delay(100);
}
} else send485("Button released!");
state = new_state;
}
}

60
examples/TempSend/TempSend.ino
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@@ -2,10 +2,31 @@
#include <SoftRS485.h>
#include <SimpleDHT.h>
// TempSend
//
// This is an example for sending DHT11 measures over an RS485 multimaster network.
// It makes use of an internal timer to periodically query values from an DHT11 sensor, connected at pin 6:
//
// This timer is set up in the method "setupTimer".
// The _interrupt service routine_ (ISR) just sets a flag _readSample_, which is checked in the main loop.
// If the _readSample_ flag is set, a measure is fetched from the sensor and transmitted via _send485_ call.
//
// The main loop also listens for incoming messages and echos them on the Serial console.
int pinDHT11 = 6;
int count = 0;
String s;
boolean readSample = false;
SimpleDHT11 dht11(pinDHT11);
SimpleDHT11 dht11(pinDHT11); // Sensor connected on pin 6
void setupTimer(){
TCCR1A = 0; // Init Timer1A
TCCR1B = 0; // Init Timer1B
TCCR1B |= B00000101; // Prescaler = 1024
OCR1A = 31250; // Timer Compare1A Register
TIMSK1 |= B00000010; // Enable Timer COMPA Interrupt
}
void setup() {
Serial.begin(115200);
@@ -15,21 +36,32 @@ void setup() {
// connect pin 3 to ^RE of Max485
// connect pin 4 to DE of Max485
// connect pin 5 to DI of Max485
while (!send485("Hello world!")) {}
while (!send485("Hello world!")) {} // send hello on network
setupTimer(); // start timer for DHT 11 measurements
}
/* Interrupt service routine – sets _readSample_ flag */
ISR(TIMER1_COMPA_vect){
OCR1A += 31250; // Advance The COMPA Register
readSample = true;
}
void loop() {
delay(2000);
// read without samples.
byte temperature = 0;
byte humidity = 0;
int err = SimpleDHTErrSuccess;
if ((err = dht11.read(&temperature, &humidity, NULL)) != SimpleDHTErrSuccess) {
Serial.print("Read DHT11 failed, err="); Serial.print(SimpleDHTErrCode(err));
Serial.print(","); Serial.println(SimpleDHTErrDuration(err)); delay(1000);
return;
if (available485()) Serial.println("Received: "+get485message());
if (readSample){ // it is time to take a reading!
readSample = false;
byte temperature = 0;
byte humidity = 0;
int err = SimpleDHTErrSuccess;
count++;
s = "Sample "+String(count);
if ((err = dht11.read(&temperature, &humidity, NULL)) != SimpleDHTErrSuccess) {
s += " failed, err="+String(SimpleDHTErrCode(err))+","+String(SimpleDHTErrDuration(err));
} else {
s += " ok: "+ String(temperature)+" *C, "+String(humidity)+"% rel";
}
while (!send485(s.c_str())) { /* repeat until successfull */ }
}
count++;
String s = "Sample "+String(count)+" ok: "+ String(temperature)+" *C, "+String(humidity)+"% rel";
send485(s.c_str());
}