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本帖最後由 leo0983405269 於 2017-9-27 18:47 編輯
我的問題跟之前有人問過的問題類似
只是我沒辦法從他那邊嘗試成功在手機顯示
#include <SoftwareSerial.h> //Arduino I2C library
const int trig = 8; //define Arduino pin
const int echo = 7;
const int TX = 1;
const int RX = 0;
const int delay_time = 1000; //delay 1000 ms for every measurment
SoftwareSerial BT(0, 1);
//set Bluetooth RX (-> pin TX of Bluetooth Module), TX (-> pin RX of Bluetooth Module)
void setup() {
Serial.begin(9600); //set baud rate of Serial Monitor
BT.begin(9600); //set baud rate of Bluetooth
pinMode(trig, OUTPUT); //set trigger pin to OUTPUT (-> pin trig of Ultrasonic Sensor)
pinMode(echo, INPUT); //set echo pin to INPUT (-> pin echo of Ultrasonic Sensor)
Serial.println("Start!!!");
}
void loop() {
float duration; //duration to record the time of every back and forth
float distance;
digitalWrite(trig, HIGH); //trigger sona for 1 ms
delayMicroseconds(1000);
digitalWrite(trig, LOW);
duration = pulseIn(echo, HIGH);
//use pulseIn() function to get the time of pin echo from HIGH to LOW, unit=microseconds
distance = (duration / 2) * 0.034;
//distance = ( half of time of back and forth )x( wave velocity(use 0.034 cm per microsecond) )
Serial.print("Distance ="); //show result on Serial Monitor
Serial.print(distance);
Serial.println("cm");
delay(500);
int sendData = (int) (distance * 100); //times 100 and convert disance to integer
byte packet[3];
packet[0] = 97; //key send to phone
packet[1] = sendData / 256; //divides sendData to two 1 byte packets
packet[2] = sendData % 256;
if(BT.available() > 0) //check BT is succeed
if(BT.read() == 97) //check recieve key from phone
{
Serial.println("succeed!");
for(int i = 0; i < 3; i++)
BT.write(packet); //send packet to phone
}
}＿
紅色部分是我有更改過的參數
他手機程式如下面沒有橘色拼圖的圖片 有關於顯示數值的部分 除了連線斷線部分我沒有上傳
有橘色拼圖的那張圖 是可變電阻的 範例
網址http://blog.cavedu.com/programmi ... tooth3/#prettyPhoto
希望有人能幫忙翻譯一下橘色部分 為什麼要一下*256 一下+256等等的ˋ
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發表於 2017-9-27 14:23:00
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