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#include <SoftwareSerial.h> #define READLED 4 #define RX 2 #define TX 3 SoftwareSerial BT(RX,TX); void setup() { // put your setup code here, to run once: pinMode(READLED,INPUT); Serial.begin(38400); Serial.println(“receive”); BT.begin(38400); delay(

#include <SoftwareSerial.h> #define RX 2 #define TX 3 #define LED 4 SoftwareSerial BT(RX,TX); void setup() { // put your setup code here, to run once: Serial.begin(9600); Serial.println(“receive”); BT.begin(9600); delay(1000); BT.print(“AT”); Serial.

4行3列薄膜，从左往右，连线为：7根线，连接arduino8-2 #define ROW 4 /*有几行*/ #define COL 3 /*有几列*/ #include <Keypad.h> char keymap[ROW][COL] ={ {'1','2','3'}, {'4','5','6'}, {'7','8','9'}, {'*','0','#'}}; byte colpins[COL] = {4,3,2}; byte rowpins[ROW] = {8,7,6,5}