Chao: /* Programming */

2025-10-25T09:30:38Z

Programming

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 == Pin definition and Rating  ==
 [[File:SHD RL01 4.jpg|thumbnail]]
 == Control by Bluetooth Module Software Serial Port ==

Chao at 18:46, 27 November 2016

2016-11-27T18:46:32Z

New page

== Pin definition and Rating ==
[[File:SHD RL01 4.jpg|thumbnail]]

== Programming ==
=== Use with Nrf24l01 ===

The demo code is test the module RF, BTBee and Relay part. And the code base on the [[NRF24L01]], you need change the pin define as below. If you test the Bluetooth Bee interface, you need used other Bluetooth device paired with BTBee. Here we used a Android phone with our [http://elecfreaks.com/store/download/datasheet/Bluetooth/EF_BluetoothBeeV1.1.zip APP] as client to paired with BTbee(HC-o6), more about paired [http://www.elecfreaks.com/829.html here].

<syntaxhighlight lang="arduino">

#include "API.h"

//---------------------------------------------
#define TX_ADR_WIDTH 5
// 5 unsigned chars TX(RX) address width
#define TX_PLOAD_WIDTH 1
// 20 unsigned chars TX payload
//---------------------------------------------
#define CE 9
// CE_BIT: Digital Input Chip Enable Activates RX or TX mode
#define CSN 10
// CSN BIT: Digital Input SPI Chip Select
#define SCK 13
// SCK BIT: Digital Input SPI Clock
#define MOSI 11
// MOSI BIT: Digital Input SPI Slave Data Input
#define MISO 12
// MISO BIT: Digital Output SPI Slave Data Output, with tri-state option
#define IRQ 8
// IRQ BIT: Digital Output Maskable interrupt pin
//*********************************************
#endif

</syntaxhighlight>

== Control by Bluetooth Module Software Serial Port ==
[[File:RelayShield.jpg|thumbnail]]
[[File:RelayShield02.jpg|thumbnail]]
* Use softserial library create software serial port, communicate with bluetooth module

<syntaxhighlight lang="arduino">

#include <NewSoftSerial.h>
#include <TimerOne.h>

#define rxPin 2
#define txPin 3

NewSoftSerial mySerial(rxPin, txPin);

void Callback()
{
Serial.println("-------> Callback Send AT");
mySerial.print("AT");
}

void setup()
{
// define pin modes for tx, rx, led pins:
pinMode(rxPin, INPUT);
pinMode(txPin, OUTPUT);
mySerial.begin(9600);
Serial.begin(9600);

//Timer1.initialize(2000000); // setting callback is 2s
//Timer1.attachInterrupt(Callback);
Serial.println("-------> Start ");
}

void loop()
{
int i = 0;
char someChar[32] = {0};
// when characters arrive over the serial port...
if(Serial.available()) {
Serial.println();
Serial.print("-------> ");
do{
someChar[i++] = Serial.read(); // Note HC-06 end not '/r/n', direct input "AT" command from Serial port
}while (Serial.available() > 0);

mySerial.print(someChar);
Serial.println(someChar);
}

while(mySerial.available())
Serial.println((char)mySerial.read());
}

</syntaxhighlight>

== Arduino Mega or Hardware serial port ==
[[File:RelayShield-Mega.jpg|thumbnail]]
If you used '''Arduino Mage1280/250''' there are some different.Please note the NewSoftSerial library about Mage2560 explanation in SoftwareSerial.cpp :

// Specifically for the Arduino Mega 2560 (or 1280 on the original Arduino Mega)
// A majority of the pins are NOT PCINTs, SO BE WARNED (i.e. you cannot use them as receive pins)
// Only pins available for RECEIVE (TRANSMIT can be on any pin):
// (I've deliberately left out pin mapping to the Hardware USARTs - seems senseless to me)
// Pins: 10, 11, 12, 13, 50, 51, 52, 53, 62, 63, 64, 65, 66, 67, 68, 69

That's mean the library do not support D0-D7 as receive pins, just could use pins:10, 11, 12, 13, 50, 51, 52, 53, 62, 63, 64, 65, 66, 67, 68, 69 for receive. So there are two way to resolve it, but all need external jumper wires.

* '''First method''': Change the define of rxPin and txPin. Jumper wires connect DOUT-D10, DIN-D11.

#define rxPin 10
#define txPin 11

* '''Second method''': Use the others Hardware Serialport because of Mage there are 4 hardware serialport. Jumper wires connect '''DOUT-RX1(D19) DIN-TX1(D18)'''

<syntaxhighlight lang="arduino">

void setup()
{
Serial.begin(9600);
Serial1.begin(9600);

}
void loop()
{
int i = 0;
char someChar[32] = {0};
// when characters arrive over the serial port...
if(Serial.available()) {
Serial.print("-------> ");
do{
someChar[i++] = Serial.read();
}while (Serial.available() > 0);

Serial1.println(someChar);
Serial.println(someChar);
}

while(Serial1.available())
Serial.print((char)Serial1.read());
}

</syntaxhighlight>

== Documents ==
*[[File:Relay Shield Schematic.pdf]]

[[Category:Relay]]

Wireless Relay Arduino Shield - Revision history

Chao: /* Programming */

Chao at 18:46, 27 November 2016