updated ANGLE

docs/en/core/m5stick.md

@@ -11,7 +11,7 @@
 
 <mark>**M5Stick**</mark> is a mini esp32 development board including 1.3' OLED Screen(64x128), led, button, buzzer, IR Transmitter, 80mAh-Battery and **optional MEMS(MPU9250)**. Usually, you can put it on your wrist with `WATCH BELT` or band it on the wall with `WALL` or `BRICK`.
 
-There are two version of it. White version does not contain MPU9250, gray version contains MPU9250 and some accessories(likes `WATCH BELT`, `WALL` and `BRICK`).
+There are two version of it. White version does not contain MPU9250, gray version contains MPU9250 and some accessories(likes `WATCH BELT`, `WALL/1515` and `BRICK`).
 
 **The following figure shows the position indication of Button A and Assembly hole**
 

docs/en/unit/angle.md

@@ -8,13 +8,17 @@
 
 ## Description
 
-<mark>ANGLE</mark> is a potentiometer sensor that can detect rotary
-angle.
+**<mark>ANGLE</mark>** is a Unit with the highest resistance of **10K** potentiometer. The potentiometer is a resistance element having three terminals and the resistance value can be adjusted by the knob rotation. Each time the potentiometer is rotated to a different position, the Unit outputs a different voltage value named Uo. It can be used to adjust motor speed, LED brightness and more. The specific analysis is shown in the figure below.
+
+<img src="assets/img/product_pics/unit/angle/unit_angle_03.png">
+
+The Unit's Grove interface is black, indicating an analog interface that needs to be connected to the M5Core's GROVE B interface.
 
 ## Feature
 
--  GROVE interface, support [UIFlow](http://flow.m5stack.com) and [Arduino](http://www.arduino.cc)
--  Two Lego installation holes
+- Output voltage range: 0 ~ 2500mV
+- GROVE interface, support [UIFlow](http://flow.m5stack.com) and [Arduino](http://www.arduino.cc)
+- Two Lego installation holes
 
 ## Include
 
@@ -35,19 +39,32 @@ angle.
 
 ```arduino
 #include <M5Stack.h>
-
 // select the input pin for the potentiometer
-#define sensorPin 36
-
-// declaration
+int sensorPin = 36;
+// last variable to store the value coming from the sensor
+int last_sensorValue = 0;
+// current variable to store the value coming from the sensor
 int cur_sensorValue = 0;
 
-// initialization
-M5.begin();
-pinMode(sensorPin, INPUT);
+void setup() {
+  M5.begin();
+  pinMode(sensorPin, INPUT);
+  M5.Lcd.setTextSize(2);
+  M5.Lcd.setCursor(0, 0);
+  M5.Lcd.print("the value of ANGLE: ");
+}
 
-// read data
-cur_sensorValue = analogRead(sensorPin);
+void loop() {
+  // read the value from the sensor:
+  cur_sensorValue = analogRead(sensorPin);
+  M5.Lcd.setCursor(0, 25);
+  if(abs(cur_sensorValue - last_sensorValue) > 10){//debaunce
+    M5.Lcd.fillRect(0, 25, 100, 25, BLACK);
+    M5.Lcd.print(cur_sensorValue);
+    last_sensorValue = cur_sensorValue;
+  }
+  delay(50);
+}
 ```
 
 <img src="assets/img/product_pics/unit/unit_example/ANGLE/example_unit_angle_04.png">

docs/ja/core/m5stick.md

@@ -11,7 +11,7 @@
 
 <mark>**M5Stick**</mark> は1.3インチの白黒OLEDスクリーン(64x128)、LED、ボタン、ブザー、IR送信機と80mAhの電池を内蔵した開発用ボードです。小型なのでウェアラブルデバイスとして使用したり、壁などに固定して利用することが可能です。
 
-**M5Stick** は２種類のモデルがあります。通常版と MPU9250 版です。MPU9250 版には９軸のIMUが搭載され、さらに`WATCH BELT`、`WALL`、`BRICK`が付属します。
+**M5Stick** は２種類のモデルがあります。通常版と MPU9250 版です。MPU9250 版には９軸のIMUが搭載され、さらに`WATCH BELT`、`WALL/1515`、`BRICK`が付属します。
 
 **ボタンAとベルト用の凹部**
 

docs/zh_CN/core/m5stick.md

@@ -11,7 +11,7 @@
 
 <mark>**M5Stick**</mark> 是一个包含 1.3 寸 OLED 屏幕 ( 64x128 )，LED 灯，按键 A，蜂鸣器，红外发射管和 80mA 的电池的小型 ESP32 开发板。因为 M5Stick 两侧有安装孔，把手表底座安装到安装孔上之后，您可以将它戴在手腕上。
 
-M5Stick有两个版本，白色外壳是无 MPU9250 的版本，灰色外壳是有 MPU9250 的版本，附送一些配件(`手表底座 ( WATCH BELT )`, `WALL` 和 `BRICK`)。
+M5Stick有两个版本，白色外壳是无 MPU9250 的版本，灰色外壳是有 MPU9250 的版本，附送一些配件(`手表底座 ( WATCH BELT )`, `WALL/1515` 和 `BRICK`)。
 
 **下图为按键 A 和安装孔的位置指示**
 

docs/zh_CN/unit/angle.md

@@ -1,4 +1,4 @@
-# ANGLE - 角度传感器Unit {docsify-ignore-all}
+# Unit ANGLE {docsify-ignore-all}
 
 <img src="assets/img/product_pics/unit/M5GO_Unit_angle.png" width="30%" height="30%"><img src="assets/img/product_pics/unit/unit_angle_grove_b.png" width="30%" height="30%">
 
@@ -8,12 +8,17 @@
 
 ## 描述
 
-**<mark>ANGLE</mark>** 是一个电位器 Unit，通过这个 Unit 可以检测手动旋转的角度。
+**<mark>ANGLE</mark>** 是一个含有最高电阻为 **10K** 电位器的 Unit。电位器是具有三个引出端、阻值可由旋钮旋转调节的电阻元件。每次旋转电位器到不同位置，Unit 会输出不同的电压值 Uo。它可以被用来调整电机转速，LED 灯亮度等。具体分析如下图所示。
+
+<img src="assets/img/product_pics/unit/angle/unit_angle_03.png">
+
+该 Unit 的 Grove 接口是黑色，说明是模拟接口，需要连接到 M5Core 的 GROVE B 接口。
 
 ## 特性
 
-- GROVE接口，支持[UIFlow](http://flow.m5stack.com)编程，[Arduino](http://www.arduino.cc)编程
-- Unit内置两个Lego插件孔，方便与Lego件结合
+- 输出电压范围：0 ~ 2500mV
+- GROVE 接口，支持 [UIFlow](http://flow.m5stack.com) 编程，[Arduino](http://www.arduino.cc )编程
+- Unit 内置两个 Lego 插件孔，方便与 Lego 件结合
 
 ## 包含
 
@@ -34,19 +39,32 @@
 
 ```arduino
 #include <M5Stack.h>
-
 // select the input pin for the potentiometer
-#define sensorPin 36
-
-// declaration
+int sensorPin = 36;
+// last variable to store the value coming from the sensor
+int last_sensorValue = 0;
+// current variable to store the value coming from the sensor
 int cur_sensorValue = 0;
 
-// initialization
-M5.begin();
-pinMode(sensorPin, INPUT);
+void setup() {
+  M5.begin();
+  pinMode(sensorPin, INPUT);
+  M5.Lcd.setTextSize(2);
+  M5.Lcd.setCursor(0, 0);
+  M5.Lcd.print("the value of ANGLE: ");
+}
 
-// read data
-cur_sensorValue = analogRead(sensorPin);
+void loop() {
+  // read the value from the sensor:
+  cur_sensorValue = analogRead(sensorPin);
+  M5.Lcd.setCursor(0, 25);
+  if(abs(cur_sensorValue - last_sensorValue) > 10){//debaunce
+    M5.Lcd.fillRect(0, 25, 100, 25, BLACK);
+    M5.Lcd.print(cur_sensorValue);
+    last_sensorValue = cur_sensorValue;
+  }
+  delay(50);
+}
 ```
 
 <img src="assets/img/product_pics/unit/unit_example/ANGLE/example_unit_angle_04.png">
@@ -65,5 +83,5 @@ cur_sensorValue = analogRead(sensorPin);
 
 <table>
  <tr><td>M5Core(GROVE B)</td><td>GPIO36</td><td>GPIO26</td><td>5V</td><td>GND</td></tr>
- <tr><td>角度传感器Unit</td><td>传感器引脚</td><td> </td><td>5V</td><td>GND</td></tr>
+ <tr><td>角度传感器 Unit</td><td>传感器引脚</td><td> </td><td>5V</td><td>GND</td></tr>
 </table>