/* YourDuino SoftwareSerialExample1 - Connect to another Arduino running "YD_SoftwareSerialExampleRS485_1Remote" - Connect this unit Pins 10, 11, Gnd - Pin 3 used for RS485 direction control - To other unit Pins 11,10, Gnd (Cross over) - Open Serial Monitor, type in top window. - Should see same characters echoed back from remote Arduino Questions: terry@yourduino.com */ /*-----( Import needed libraries )-----*/ #include <SoftwareSerial.h> /*-----( Declare Constants and Pin Numbers )-----*/ #define SSerialRX 10 //Serial Receive pin #define SSerialTX 11 //Serial Transmit pin #define SSerialTxControl 3 //RS485 Direction control #define RS485Transmit HIGH #define RS485Receive LOW #define Pin13LED 13 /*-----( Declare objects )-----*/ SoftwareSerial RS485Serial(SSerialRX, SSerialTX); // RX, TX /*-----( Declare Variables )-----*/ int byteReceived; int byteSend; void setup() /****** SETUP: RUNS ONCE ******/ { // Start the built-in serial port, probably to Serial Monitor Serial.begin(9600); Serial.println("YourDuino.com SoftwareSerial remote loop example"); Serial.println("Use Serial Monitor, type in upper window, ENTER"); pinMode(Pin13LED, OUTPUT); pinMode(SSerialTxControl, OUTPUT); digitalWrite(SSerialTxControl, RS485Receive); // Init Transceiver // Start the software serial port, to another device RS485Serial.begin(4800); // set the data rate }//--(end setup )--- void loop() /****** LOOP: RUNS CONSTANTLY ******/ { digitalWrite(Pin13LED, HIGH); // Show activity if (Serial.available()) { byteSend = Serial.read(); digitalWrite(SSerialTxControl, RS485Transmit); // Enable RS485 Transmit RS485Serial.write(byteSend); // Send byte to Remote Arduino digitalWrite(Pin13LED, LOW); // Show activity delay(10); digitalWrite(SSerialTxControl, RS485Receive); // Disable RS485 Transmit } if (RS485Serial.available()) //Look for data from other Arduino { digitalWrite(Pin13LED, HIGH); // Show activity byteReceived = RS485Serial.read(); // Read received byte if (byteReceived!=0 && byteReceived!=10 && byteReceived!=13) { Serial.print("receive:"); // Show on Serial Monitor Serial.write(byteReceived); Serial.println(); } delay(10); digitalWrite(Pin13LED, LOW); // Show activity } }//--(end main loop )--- /*-----( Declare User-written Functions )-----*/ //NONE //*********( THE END )***********
/* YourDuino SoftwareSerialExample1Remote - Used with YD_SoftwareSerialExampleRS485_1 on another Arduino - Remote: Receive data, loop it back... - Connect this unit Pins 10, 11, Gnd - To other unit Pins 11,10, Gnd (Cross over) - Pin 3 used for RS485 direction control - Pin 13 LED blinks when data is received Questions: terry@yourduino.com */ /*-----( Import needed libraries )-----*/ #include <SoftwareSerial.h> /*-----( Declare Constants and Pin Numbers )-----*/ #define SSerialRX 10 //Serial Receive pin #define SSerialTX 11 //Serial Transmit pin #define SSerialTxControl 3 //RS485 Direction control #define RS485Transmit HIGH #define RS485Receive LOW #define Pin13LED 13 /*-----( Declare objects )-----*/ SoftwareSerial RS485Serial(SSerialRX, SSerialTX); // RX, TX /*-----( Declare Variables )-----*/ int byteReceived; int byteSend; void setup() /****** SETUP: RUNS ONCE ******/ { // Start the built-in serial port, probably to Serial Monitor Serial.begin(9600); Serial.println("SerialRemote"); // Can be ignored pinMode(Pin13LED, OUTPUT); pinMode(SSerialTxControl, OUTPUT); digitalWrite(SSerialTxControl, RS485Receive); // Init Transceiver // Start the software serial port, to another device RS485Serial.begin(4800); // set the data rate }//--(end setup )--- void loop() /****** LOOP: RUNS CONSTANTLY ******/ { //Copy input data to output if (RS485Serial.available()) { byteSend = RS485Serial.read(); // Read the byte digitalWrite(Pin13LED, HIGH); // Show activity delay(10); digitalWrite(Pin13LED, LOW); Serial.write(byteSend); digitalWrite(SSerialTxControl, RS485Transmit); // Enable RS485 Transmit if (byteSend!=0 && byteSend!=10 && byteSend!=13) RS485Serial.write(byteSend); // Send the byte back delay(10); digitalWrite(SSerialTxControl, RS485Receive); // Disable RS485 Transmit // delay(100); }// End If RS485SerialAvailable }//--(end main loop )--- /*-----( Declare User-written Functions )-----*/ //NONE //*********( THE END )***********
| Chip | Sizp |
|---|---|
| ATmega328 | 1024 bytes |
| ATmega168 | 512 bytes |
| ATmega8 | 1024 bytes |
| ATmega1280 | 4KB (4096 bytes) |
| ATmega2560 | 4KB (4096 bytes) |
#include <EEPROM.h> void setup() { // put your setup code here, to run once: Serial.begin(9600); Serial.print("EEPROM length: "); Serial.println(EEPROM.length()); } void loop() { // put your main code here, to run repeatedly: }
#include <EEPROM.h> void setup() { // put your setup code here, to run once: Serial.begin(9600); EEPROM.write(0,10); byte b=EEPROM.read(0); Serial.println(b); } void loop() { // put your main code here, to run repeatedly: }
#include <EEPROM.h> void setup() { // put your setup code here, to run once: Serial.begin(9600); //EEPROM.write(0,10); byte b=EEPROM.read(0); Serial.println(b); } void loop() { // put your main code here, to run repeatedly: }
#include <EEPROM.h> void setup() { // put your setup code here, to run once: Serial.begin(9600); //EEPROM.write(0,10); byte b=EEPROM.read(0); Serial.println(b); float pi=3.14159; EEPROM.put(2,pi); float readfloat=0; EEPROM.get(2,readfloat); Serial.println(readfloat); } void loop() { // put your main code here, to run repeatedly: }
public class Testtranspose { public static void main(String[] args) { final int[][] original = new int[][] { { 1, 2, 3, 4 }, { 5, 6, 7, 8 }, { 9, 10, 11, 12 } }; for (int i = 0; i < original.length; i++) { for (int j = 0; j < original[i].length; j++) { System.out.print(original[i][j] + " "); } System.out.print("\n"); } int[][] tranposeArray=transpose(original) ; for (int i = 0; i < original[0].length; i++) { for (int j = 0; j < original.length; j++) { System.out.print(original[j][i] + " "); } System.out.print("\n"); } } public static int[][] transpose(int[][] original) { int[][] transposeArray=new int[original[0].length][original.length]; System.out.print("\n\n matrix transpose:\n"); // transpose if (original.length > 0) { for (int i = 0; i < original[0].length; i++) { for (int j = 0; j < original.length; j++) { transposeArray[i][j]=original[j][i]; } } } return transposeArray; } }
| 5-Pin XLR | 3-Pin XLR | Signal |
| Pin 1 | Pin 1 | Signal Ground |
| Pin 2 | Pin 2 | DMX Data - |
| Pin 3 | Pin 3 | DMX Data + |
| Pin 4 | n/c | Auxiliary Data - |
| Pin 5 | n/c | Auxiliary Data |
 | |
| 針頭 | 功能 |
|---|---|
| 1 | 底架接地（纜線護罩） |
| 2 | 正極終端（熱） |
| 3 | 迴路終端（冷） |
#include "DHT.h" #include <ESP8266WiFi.h> #include <PubSubClient.h> #define DHTPIN 2 // what digital pin we're connected to #define DHTTYPE DHT22 // DHT 22 (AM2302), AM2321
// NOTE: If using a board with 3.3V logic like an Arduino Due connect pin 1 // to 3.3V instead of 5V! // Connect pin 2 of the sensor to whatever your DHTPIN is // Connect pin 4 (on the right) of the sensor to GROUND
// Initialize DHT sensor. // Note that older versions of this library took an optional third parameter to // tweak the timings for faster processors. This parameter is no longer needed // as the current DHT reading algorithm adjusts itself to work on faster procs. DHT dht(DHTPIN, DHTTYPE); // Update these with values suitable for your network. const char* ssid = "your ssid"; const char* password = "your pw"; const char* mqtt_server = "MQTT Server IP"; const char* topic="your Topic";
// WiFi Client
WiFiClient espClient;
// PubSub Client
PubSubClient client(espClient);
long lastMsg = 0;
char msg[50];
int value = 0;
void setup() {
Serial.begin(9600);
Serial.println("DHTxx test!");
setup_wifi();
client.setServer(mqtt_server, 1883);
client.setCallback(callback);
dht.begin();
}
void loop() {
// Wait a few seconds between measurements.
delay(2000);
//Check Wi-Fi is Connected
if (WiFi.status() != WL_CONNECTED)
{
setup_wifi();
}
//Check MQTT Connection if (!client.connected()) {
reconnect();
}
client.loop();
// Reading temperature or humidity takes about 250 milliseconds!
// Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
float h = dht.readHumidity();
// Read temperature as Celsius (the default)
float t = dht.readTemperature();
// Read temperature as Fahrenheit (isFahrenheit = true)
float f = dht.readTemperature(true);
// Check if any reads failed and exit early (to try again).
if (isnan(h) || isnan(t) || isnan(f)) {
Serial.println("Failed to read from DHT sensor!");
return;
}
// Compute heat index in Fahrenheit (the default)
float hif = dht.computeHeatIndex(f, h);
// Compute heat index in Celsius (isFahreheit = false)
float hic = dht.computeHeatIndex(t, h, false);
Serial.print("Humidity: ");
Serial.print(h);
Serial.print(" %\t");
Serial.print("Temperature: ");
Serial.print(t);
Serial.print(" *C ");
Serial.print(f);
Serial.print(" *F\t");
Serial.print("Heat index: ");
Serial.print(hic);
Serial.print(" *C ");
Serial.print(hif);
Serial.println(" *F");
long now = millis();
// read DHT22 sensor every 6 seconds
if (now - lastMsg > 6000) {
lastMsg = now;
String msg=String(h)+","+String(t);
Serial.println(msg);
char message[msg.length()];
msg.toCharArray(message,msg.length());
//publish sensor data to MQTT broker
client.publish(topic, message);
}
}
void setup_wifi() {
delay(100);
// We start by connecting to a WiFi network
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED)
{
delay(500);
Serial.print(".");
}
randomSeed(micros());
Serial.println("");
Serial.println("WiFi connected");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
}
// recieve Topic message handler , I don't implements it
void callback(char* topic, byte* payload, unsigned int length)
{
}
void reconnect() {
// Loop until we're reconnected
while (!client.connected())
{
Serial.print("Attempting MQTT connection...");
// Create a random client ID
String clientId = "ESP8266Client-";
clientId += String(random(0xffff), HEX);
// Attempt to connect
//if you MQTT broker has clientID,username and password
//please change following line to if (client.connect(clientId,userName,passWord))
if (client.connect(clientId.c_str()))
{
Serial.println("connected");
//once connected to MQTT broker, subscribe command if any
client.subscribe(topic);
} else {
Serial.print("failed, rc=");
Serial.print(client.state());
Serial.println(" try again in 5 seconds");
// Wait 6 seconds before retrying
delay(6000);
}
}
} //end reconnect()