我正在做一个项目，我需要一个由 7 个按钮组成的面板来点亮大约 5m 外显示屏上的 LED 灯条。到目前为止，我已经做到了，所以我可以用一个按钮控制 1 个 LED 灯条，效果很好。我现在对如何让其他 6 个通过 BLE 连接到同一个 arduino 感到困惑。这个想法是让一个 arduino 连接所有按钮，然后为每个 LED 灯条连接 1 个 arduino。您按下按钮 arduino 上的按钮 1，这会向显示器 1 arduino 发送信号，点亮显示器。
到目前为止，这是我的代码，我需要做什么才能在其中添加多个按钮？
谢谢 ！！
//this code is loaded onto the board that is connected to the led strip
//if the code doesnt work it seems to kick start it by opening the serial monitor and then it will connect, not sure why this is
#include <ArduinoBLE.h>
#include <Adafruit_DotStar.h>
#include <SPI.h>
#define NUMPIXELS 144 // Number of LEDs in strip
#define BUTTON_PIN 9 //pin the button is on
#define DATAPIN 4 //the pin the data is plugged into
#define CLOCKPIN 5 //the pin the clock wire is plugged into
BLEService ledService("19B10000-E8F2-537E-4F6C-D104768A1214"); // adress of the ledstrip that is referenced in the other set of code
Adafruit_DotStar strip(NUMPIXELS, DATAPIN, CLOCKPIN, DOTSTAR_BRG);
// BLE LED Switch Characteristic - custom 128-bit UUID, read and writable by central
BLEByteCharacteristic switchCharacteristic("19B10001-E8F2-537E-4F6C-D104768A1214", BLERead | BLEWrite);
const int ledPin = 2; // pin to use for the LED
void setup() {
// set LED pin to output mode
pinMode(ledPin, OUTPUT);
// begin initialization
if (!BLE.begin()) {
Serial.println("starting BLE failed!");
while (1);
}
// set advertised local name and service UUID:
BLE.setLocalName("LED");
BLE.setAdvertisedService(ledService);
// add the characteristic to the service
ledService.addCharacteristic(switchCharacteristic);
// add service
BLE.addService(ledService);
// set the initial value for the characeristic:
switchCharacteristic.writeValue(0);
// start advertising
BLE.advertise();
Serial.println("BLE LED Peripheral");
strip.begin();
strip.show(); //pixels to 'off'
}
uint32_t white= strip.Color(255, 255, 255); //colour you want the lights
uint32_t off= strip.Color(0, 0, 0); //colour 'off'
void loop() {
// listen for BLE peripherals to connect:
BLEDevice central = BLE.central();
// if a central is connected to peripheral:
if (central) {
Serial.print("Connected to central: ");
// print the central's MAC address:
Serial.println(central.address());
// while the central is still connected to peripheral:
while (central.connected()) {
// if the remote device wrote to the characteristic,
// use the value to control the LED:
if (switchCharacteristic.written()) {
if (switchCharacteristic.value()) { // any value other than 0
strip.fill(white, 0, 144); //fill(Color,first pixel,last pixel)
strip.setBrightness(5); //set the brightness of the leds here, would keep about 40, doesnt like anything above that
strip.show(); //update the leds
delay(7000); //time you want the LEDs
strip.fill(off, 0, 144); //turns off leds
strip.setBrightness(0);
strip.show();
} else { // a 0 value
strip.fill(off, 0, 144);
strip.setBrightness(0);
strip.show();
}
}
}
// when the central disconnects, print it out:
Serial.print(F("Disconnected from central: "));
Serial.println(central.address());
}
}
//this code gets loaded onto the button board
#include <ArduinoBLE.h>
// variables for button
const int buttonPin = 2;
int oldButtonState = LOW;
void setup() {
// configure the button pin as input
pinMode(buttonPin, INPUT);
// initialize the BLE hardware
BLE.begin();
Serial.println("BLE Central - LED control");
// start scanning for peripherals
BLE.scanForUuid("19b10000-e8f2-537e-4f6c-d104768a1214"); //Put the adress of what you want the button to control here
}
void loop() {
// check if a peripheral has been discovered
BLEDevice peripheral = BLE.available();
if (peripheral) {
// discovered a peripheral, print out address, local name, and advertised service
Serial.print("Found ");
Serial.print(peripheral.address());
Serial.print(" '");
Serial.print(peripheral.localName());
Serial.print("' ");
Serial.print(peripheral.advertisedServiceUuid());
Serial.println();
if (peripheral.localName() != "LED") {
return;
}
// stop scanning
BLE.stopScan();
controlLed(peripheral);
// peripheral disconnected, start scanning again
BLE.scanForUuid("19b10000-e8f2-537e-4f6c-d104768a1214");
}
}
void controlLed(BLEDevice peripheral) {
// connect to the peripheral
Serial.println("Connecting ...");
if (peripheral.connect()) {
Serial.println("Connected");
} else {
Serial.println("Failed to connect!");
return;
}
// discover peripheral attributes
Serial.println("Discovering attributes ...");
if (peripheral.discoverAttributes()) {
Serial.println("Attributes discovered");
} else {
Serial.println("Attribute discovery failed!");
peripheral.disconnect();
return;
}
// retrieve the LED characteristic
BLECharacteristic ledCharacteristic = peripheral.characteristic("19b10001-e8f2-537e-4f6c-d104768a1214");
if (!ledCharacteristic) {
Serial.println("Peripheral does not have LED characteristic!");
peripheral.disconnect();
return;
} else if (!ledCharacteristic.canWrite()) {
Serial.println("Peripheral does not have a writable LED characteristic!");
peripheral.disconnect();
return;
}
while (peripheral.connected()) {
// while the peripheral is connected
// read the button pin
int buttonState = digitalRead(buttonPin);
if (oldButtonState != buttonState) {
// button changed
oldButtonState = buttonState;
if (buttonState) {
Serial.println("button pressed");
// button is pressed, write 0x01 to turn the LED on
ledCharacteristic.writeValue((byte)0x01);
} else {
Serial.println("button released");
// button is released, write 0x00 to turn the LED off
ledCharacteristic.writeValue((byte)0x00);
}
}
}
Serial.println("Peripheral disconnected");