網(wǎng)上關(guān)于esp32cam與arduino通信的資料幾乎沒有，有的還得付費，于是自己動手琢磨，實驗成功。
實驗有多個版本，成功實現(xiàn)藍牙收到數(shù)據(jù)后發(fā)送單個字符給arduino板，匹配到對應(yīng)字符亮對應(yīng)顏色的燈，發(fā)送字符串可以此類推。
實驗材料，接線方式在下圖可以看到：
需要下載一個藍牙串口助手，應(yīng)用商店里很容易找到。

arduino uno上傳代碼（接收單字符）：

int i ; void setup() {Serial.begin(115200);pinMode(2, OUTPUT);pinMode(3, OUTPUT);pinMode(4, OUTPUT); }void loop() {if (Serial.available()){ // Serial.write(Serial.read());//輸出原數(shù)據(jù)格式i = Serial.read(); // Serial.println(i);//輸出可顯示的ascll值Serial.write(i);Serial.write('\n');}if (i == 'a'){digitalWrite(2, HIGH);}if (i == 'b'){digitalWrite(3, HIGH);}if (i == 'c'){digitalWrite(4, HIGH);} }

arduino上傳代碼（接收字符串）：

String itext = "" ; void setup() {Serial.begin(115200);pinMode(2, OUTPUT);pinMode(3, OUTPUT);pinMode(4, OUTPUT); }String detectString(); String gettext();void loop() {if (Serial.available()){ // Serial.write(Serial.read());itext = gettext(); // Serial.println(i);Serial.println(itext);}if (itext == "blue"){digitalWrite(2, HIGH);}if (itext == "green"){digitalWrite(3, HIGH);}if (itext == "red"){digitalWrite(4, HIGH);} }//======接收esp32cam數(shù)據(jù)=========================== String detectString() //刪除傳輸格式 {while(Serial.read() != '{');return(Serial.readStringUntil('}')); } String gettext() //得到數(shù)據(jù) {String s = detectString();return s; }

esp32cam上傳代碼：

//This example code is in the Public Domain (or CC0 licensed, at your option.) //By Evandro Copercini - 2018 // //This example creates a bridge between Serial and Classical Bluetooth (SPP) //and also demonstrate that SerialBT have the same functionalities of a normal Serial#include "BluetoothSerial.h"#if !defined(CONFIG_BT_ENABLED) || !defined(CONFIG_BLUEDROID_ENABLED) #error Bluetooth is not enabled! Please run `make menuconfig` to and enable it #endifBluetoothSerial SerialBT;char i;void setup() {Serial.begin(115200);SerialBT.begin("ESP32test"); //Bluetooth device nameSerial.println("The device started, now you can pair it with bluetooth!"); }void loop() {// 藍牙助手發(fā)送數(shù)據(jù)到arduino unoif (SerialBT.available()) {while (SerialBT.available()) {// Serial.write(SerialBT.read());i = SerialBT.read();//一個字符一個字符讀取，讀一個就少一個Serial.print(i);//發(fā)送數(shù)據(jù)到arduino uno}}}

兩個實驗接收數(shù)據(jù)顯示圖：
（1）單字符

（2）字符串

總結(jié)

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