研究筆記-LightBlue Bean+
緣起
很久以前看這個板子的介紹就很喜歡，主要是可以透過 藍芽升級 Arduino code.年前為了免運，順便敗了這個。
Learn Check List
- Setup
- Program
- Run most sample codes
- Run demo mobile App
- iBeacon checked
Hint
Cannot find bean’s serial port in Arduino IDE
- To work around: cat /tmp/cu.LightBlue-Bean
- screen /tmp/cu.LightBlue-Bean 9600
Battery Status
- Refer Battery Functions
The current battery voltage is: 3.05V
The remaining battery life is: %70
小品分享
- 研究板子中，突然有人需要一個功能，剛好用這個板子做很有趣。隨手就做了一個
- 需求：八個外部按鈕，按下第一個按鈕，當作鍵盤敲下 '1', 其餘類推。按鈕跟電腦有點距離，不適合接線。
- 作法：板子 GPIO0-7, 連接按鈕接地。板子模擬當成藍牙鍵盤，當判斷按鈕被按過，就輸出 Keycode 給遠端電腦。
- 結果：如 code, 能基本運作，只能說板子太強大好用了，半小時完成的東西，就別要求細節了。
- /*
- * Main logic: press GPIO_0 , send keycode '1' to PC, GPIO_n -> keycode n+1'
- * GPIO setup as default PULLUP, suggest to connect to GND
- * Hardcode support GPIO 0-7
- */
- void setup() {
- BeanHid.enable();
- // Serial port is initialized automatically; we don't have to do anything
- Serial.begin();
- int i;
- for(i=0;i<8;i++){
- pinMode(i, INPUT_PULLUP);
- }
- }
- int id_down_cur=-1; // current gpio id pressing
- // return >=0 if One button released, default return -1
- int GetButtonPressId(){
- int i,value;
- if(id_down_cur>=0){
- value = digitalRead(id_down_cur);
- if(value==1){
- //Bean.setLed(0, 255, 0);
- return id_down_cur;
- }
- }
- for(i=0;i<8;i++){
- value = digitalRead(i);
- if(value==0) {
- id_down_cur=i;
- //Bean.setLed(255, 0, 0);
- }
- }
- return -1;
- }
- void loop() {
- int gpioid;
- char c;
- gpioid = GetButtonPressId();
- if( gpioid>=0 ) {
- c = 0x31+gpioid;
- //Serial.println(c);
- id_down_cur = -1;
- BeanHid.sendKey(c);
- Bean.sleep(50); // try to protect input variant from button
- }
- Bean.sleep(10);
- }
參考