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# ESP32-CAM to Switch both
## Setup ESP-32 CAM Programming Environment
Ref. [ESP32-CAM_JP](https://jorublog.site/esp32-cam-setup/)
### Additional Boards manager URLs:
```
https://dl.espressif.com/dl/package_esp32_index.json
```
### Boards Manager
```
ESP32
```
### Setting
### Connection
USB-Serial|ESP32-CAM
-- |---
RX |UOT
TX |UOR
VCC |5V
GND |GND
|IO0 to GND (When Programming)
{width=300} | 
!!! Note
**Select Bootloader Mode**
**GPIO0**
The ESP32 will enter the serial bootloader when GPIO0 is held low on reset. Otherwise it will run the program in flash.
GPIO0 Input| Mode
--|--
Low/GND | ROM serial bootloader for esptool
High/VCC|Normal execution mode
GPIO0 has an internal pullup resistor, so if it is left unconnected then it will pull high.
Ref. [Boot Mode Selection](https://docs.espressif.com/projects/esptool/en/latest/esp32/advanced-topics/boot-mode-selection.html)
### Code
```
void setup()
{
Serial.begin(9600); // 通信速度
}
void loop()
{
Serial.println("Hello, World"); // Hello, Worldを出力
delay(1000); // １秒待つ
}
```
### Serial Monitor
- **IO0 disconnect to GND**(connect to internal Pull-up to execution mode)
- Push `rest button` on ESP32-CAM
## Switch bot
Ref. [ESP32 Swich bot_JP](https://jorublog.site/esp32cam-iot-swichbot/)
### Code
```
//アクセスするときはURLパラメーターの最後に＆をつけること！
#include <WiFi.h>
// 使用するWi-Fiとそのパスワードに書き換えてください
const char* ssid = "fablabkannai";
const char* password = "marumie";
// ポート80番を使用
WiFiServer server(80);
// HTTPリクエストを格納する変数
String header;
// 値の設定に使用する変数
String valueString = String(5);
String delay_valueString = String(500);
int pos1 = 0;
int pos2 = 0;
//pin
const int servo_pin = 16;
//サーボモーターの回転角
const int servo_left = 26;
const int servo_center = 75;
const int servo_right = 123;
void setup() {
pinMode(4, OUTPUT);
//ledc setting
ledcSetup(0, 50, 10); // 0ch 50 Hz 10bit resolution
ledcAttachPin(servo_pin, 0); // 15pin, 0ch
//シリアル通信開始
Serial.begin(115200);
//起動時にフラッシュライトを点滅させる
for(int i=0; i<5; i=i+1) {
digitalWrite(4, HIGH);
delay(50);
digitalWrite(4, LOW);
delay(50);
}
// Wi-Fiに接続
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
// ローカルIPを表示（このIPにスマホなどからアクセスします）
Serial.println("");
Serial.println("WiFi connected.");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
server.begin();
}
void loop(){
WiFiClient client = server.available(); // Listen for incoming clients
if (client) { // If a new client connects,
Serial.println("New Client."); // print a message out in the serial port
String currentLine = ""; // make a String to hold incoming data from the client
while (client.connected()) { // loop while the client's connected
if (client.available()) { // if there's bytes to read from the client,
char c = client.read(); // read a byte, then
Serial.write(c); // print it out the serial monitor
header += c;
if (c == '\n') { // if the byte is a newline character
// if the current line is blank, you got two newline characters in a row.
// that's the end of the client HTTP request, so send a response:
if (currentLine.length() == 0) {
// HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
// and a content-type so the client knows what's coming, then a blank line:
client.println("HTTP/1.1 200 OK");
client.println("Content-type:text/html");
client.println("Connection: close");
client.println();
// Display the HTML web page
client.println("<!DOCTYPE html><html>");
client.println("<head><meta name=\"viewport\" content=\"width=device-width, initial-scale=1\" http-equiv=\"content-type\" charset=\"utf-8\"><title>ESP32 servo controller</title>");
// CSS to style the on/off buttons
// Feel free to change the background-color and font-size attributes to fit your preferences
client.println("<style>.block{display: inline-block; vertical-align: middle; height: 50px; font-size: 0;}");
client.println(".btn-square-shadow {display: inline-block; width: 300px; height: 50px; text-decoration: none; background: #668ad8; color: #FFF; border-bottom: solid 4px #627295; border-radius: 3px; font-size: 30px;}");
client.println(".btn-square-shadow:active {-webkit-transform: translateY(4px); transform: translateY(4px); box-shadow: 0px 0px 1px rgba(0, 0, 0, 0.2); border-bottom: none;}");
client.println("</style>");
client.println("<script src=\"https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js\"></script>");
// Web Page
client.println("</head><body style='text-align: center;'><h1>ESP32 サーボモーター コントロールパネル</h1>");
//servo slide bar <--------------------------------------------------------------------------------------------------------------------------------------------------------------------ESP32's IP address. To find open serial monitor with 115200bps
client.println("<div class='left block'> <a href='http://192.168.2.111/?angle=50&delay=500&'><button id='entrance_button' class='btn-square-shadow' type='button'>玄関の電気</button></a></div>");
client.println("<div class='right block'><a href='http://192.168.2.111/?angle=100&delay=500&'><button id='room_button' class='btn-square-shadow' type='button'>部屋の電気</button></a></div>");
client.println("</body></html>");
//HTTPリクエストの処理部分
delay_valueString = "500";
pos1 = header.indexOf('=',18);
pos2 = header.indexOf('&',18);
if(pos1!=-1 && pos2!=-1) {
delay_valueString = header.substring(pos1+1, pos2);
Serial.print("pos:");
Serial.println(pos1);
Serial.println(pos2);
} else {
Serial.print("defaultサーボ待機時間:");
Serial.println(delay_valueString.toInt());
}
Serial.print("サーボ待機時間:");
Serial.println(delay_valueString.toInt());
pos1 = header.indexOf('=');
pos2 = header.indexOf('&');
valueString = header.substring(pos1+1, pos2);
Serial.print("URLパラメーター:");
Serial.println(valueString);
if(valueString.toInt()>=26 && valueString.toInt()<=123) {
//サーボモーターを回転
digitalWrite(4, HIGH);
delay(50);
digitalWrite(4, LOW);
ledcWrite(0, servo_center);
delay(delay_valueString.toInt());
ledcWrite(0, valueString.toInt());
delay(delay_valueString.toInt());
ledcWrite(0, servo_center);
// バグ防止
delay(delay_valueString.toInt());
ledcWrite(0, 0);
digitalWrite(4, HIGH);
delay(50);
digitalWrite(4, LOW);
} else {
Serial.println("URLパラメーター エラー！");
}
// HTTPレスポンスの終了
client.println();
// Break out of the while loop
break;
} else {
currentLine = "";
}
} else if (c != '\r') {
currentLine += c;
}
}
}
// Clear the header variable
header = "";
// 接続を切断
client.stop();
Serial.println("Client disconnected.");
Serial.println("");
}
}
```
### Connection
ESP32-CAM|<br />
-- |---
5V |5V (Power+)
GND |GND(Power-)
3V3 |Servo VCC
IO16 |Servo signal
GND |Servo GND
### How to use
#### Direct switch
Open in browser
```
http://192.168.2.111/?angle=50&delay=500&
```
- 192.168.2.111: loacal IP address of ESP32-CAM in Arduio Sketch
- angle : servo rotate degree (23-123)
- delay: set delay when servo move back
#### Switch on screen
```
http://192.168.1.111
```
