fixed some bugs

docs/en/base/plc_base.md

@@ -1,3 +1,52 @@
 # PLC-Base
 
-## (coming soon...)
+<img src="assets/img/product_pics/module/module_plc_01.png" width="30%" height="30%"> <img src="assets/img/product_pics/module/module_plc_02.png" width="30%" height="30%">
+
+***
+
+:memo:**[Description](#Description)**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;:octocat:**[Example](#Example)**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;:electric_plug:**[Schematic](#Schematic)**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;🛒**[Purchase](https://www.aliexpress.com/store/product/M5Stack-PLC-Proto-Industrial-Board-Module-Contains-RS485-ACS712-5B-Programmable-Logic-Controller-Relay-with-Magnet/3226069_32874916056.html?spm=2114.12010615.8148356.2.4c5b68a1WZ8sjd)**
+
+## Description
+
+The M5Stack PLC Module is a prototye industrial board, including RS484
+adapter and electricity meter module.
+
+With DC9~24V power input, PLC-Proto motherboard reserved 6Pin or 4Pin
+relay output, digital input, communication interface etc.
+
+## Feature
+
+-  Free DIY
+-  Programmable Logic Controller
+-  Individual package weight: 0.1kg (0.22lb.)
+-  Package size: 5cm \* 5cm \* 5cm (1.97in \* 1.97in \* 1.97in)
+
+## Include
+
+-  1x PLC-Proto Broad
+-  1x RS485 module
+-  1x PLC Plastic Enclosure
+-  1x Slide Guide
+-  1x Magnet
+-  1x 6 Pin 3.96 Pitch Terminal
+-  1x 4 Pin 3.96 Pitch Terminal
+-  3x Hex Key
+-  7x Electrical Terminal
+-  1x Sticker
+
+## Applications
+
+-  Programmable Logic Controller
+-  Programmable Motion Controller
+-  Digital Operation Processor
+-  Strong Electric Controller
+
+## Related Link
+
+- **[Offical Video](https://www.youtube.com/channel/UCozgFVglWYQXbvTmGyS739w)**
+
+- **[Forum](http://forum.m5stack.com/)**
+
+## Schematic
+
+<img src="assets/img/product_pics/base/plc_sch.png">

docs/en/module/lora.md

@@ -1,4 +1,4 @@
-# M5Stack LORA Module
+# LORA
 
 <img src="assets/img/product_pics/module/module_lora_01.png" width="30%" height="30%"> <img src="assets/img/product_pics/module/module_lora_02.png" width="30%" height="30%"> <img src="assets/img/product_pics/module/module_lora_03.png" width="30%" height="30%">
 
@@ -54,7 +54,13 @@ account the distance, anti-interference and power consumption
 
 ### Arduino IDE
 
-This is point-to-point communication example between two LORA modules. One is transmitter, another is receiver.
+This is point-to-point communication example between two LORA modules. Two lora nodes send and receive information to each other.
+
+* If a lora send message successfully, it'll display blue string.
+
+* If a lora receive message from another one successfully, it'll display yellow string.
+
+* If a lora initialize unsuccessfully, it'll display red string.
 
 *If you want the complete code, please click [here](https://github.com/m5stack/M5-ProductExampleCodes/tree/master/Module/LORA/Arduino)*
 
@@ -62,49 +68,49 @@ This is point-to-point communication example between two LORA modules. One is tr
 #include <M5Stack.h>
 #include <M5LoRa.h>
 
-// declaration
-static uint32_t counter;
+//declaration
+String outgoing;                     // outgoing message
+byte msgCount = 0;                   // count of outgoing messages
+byte localAddress = 0xBB;            // address of this device
+byte destination = 0xFF;             // destination to send to
 
-// initialization
-// override the default CS, reset, and IRQ pins (optional)
-LoRa.setPins(); // default set CS, reset, IRQ pin
-M5.Lcd.println("LoRa Sender");
-// frequency in Hz (433E6, 866E6, 915E6)
-LoRa.begin(433E6);
-
-// send data
-LoRa.beginPacket();
-LoRa.print("hello ");
-LoRa.print(counter);// lora send data
-LoRa.endPacket();
-```
-
-```arduino
-/*
-    LoRaReceiver.ino
-*/
-#include <M5Stack.h>
-#include <M5LoRa.h>
-
-// initialization
+//initialization
 M5.begin();
-// override the default CS, reset, and IRQ pins (optional)
-LoRa.setPins();// default set CS, reset, IRQ pin
-// frequency in Hz (433E6, 866E6, 915E6)
-LoRa.begin(433E6);
+LoRa.setPins();                      // set CS, reset, IRQ pin
+LoRa.begin(433E6);                   // initialize ratio at 915 MHz
 
-// try to parse packet
-int packetSize = LoRa.parsePacket();
-if (packetSize) {
-  // read packet
-  while (LoRa.available()) {
-    char ch = (char)LoRa.read();
-    M5.Lcd.print(ch);
-  }
-  // print RSSI of packet
-  M5.Lcd.print("\" with RSSI ");
-  M5.Lcd.println(LoRa.packetRssi());
+//send message
+void sendMessage(String outgoing) {
+  LoRa.beginPacket();                // start packet
+  LoRa.write(destination);           // add destination address
+  LoRa.write(localAddress);          // add sender address
+  LoRa.write(msgCount);              // add message ID
+  LoRa.write(outgoing.length());     // add payload length
+  LoRa.print(outgoing);              // add payload
+  LoRa.endPacket();                  // finish packet and send it
+  msgCount++;                        // increment message ID
 }
+
+//receive message
+void onReceive(int packetSize) {
+  if (packetSize == 0) return;       // if there's no packet, return
+  int recipient = LoRa.read();       // recipient address
+  byte sender = LoRa.read();         // sender address
+  byte incomingMsgId = LoRa.read();  // incoming msg ID
+  byte incomingLength = LoRa.read(); // incoming msg length
+
+  String incoming = "";
+
+  while (LoRa.available()) {
+    incoming += (char)LoRa.read();
+  }
+}
+
+onReceive(LoRa.parsePacket());
 ```
 
-<img src="assets/img/product_pics/module/module_example/LORA/example_module_lora_01.png">
+<img src="assets/img/product_pics/module/module_example/LORA/example_module_lora_02.png">
+
+## Schematic
+
+<img src="assets/img/product_pics/module/lora_sch.png">

docs/en/module/lorawan.md

@@ -4,9 +4,7 @@
 
 ***
 
-:memo:**[Description](#Description)**      :octocat:**[Example](#Example)**      🛒**[Purchase](https://www.aliexpress.com/store/product/M5Stack-New-LoRaWAN-Module-433-470Mhz-868-915MHz-with-Internal-Antenna-and-MCX-External-Antenna-Port/3226069_32953098569.html?spm=a2g1y.12024536.productList_5885011.pic_2)**
-
-<!-- :memo:**[Description](#Description)**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;:octocat:**[Example](#Example)**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;:electric_plug:**[Schematic](#Schematic)**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;🛒**[Purchase](https://www.aliexpress.com/store/product/M5Stack-New-LoRaWAN-Module-433-470Mhz-868-915MHz-with-Internal-Antenna-and-MCX-External-Antenna-Port/3226069_32953098569.html?spm=a2g1y.12024536.productList_5885011.pic_2)** -->
+:memo:**[Description](#Description)**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;:octocat:**[Example](#Example)**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;:electric_plug:**[Schematic](#Schematic)**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;🛒**[Purchase](https://www.aliexpress.com/store/product/M5Stack-New-LoRaWAN-Module-433-470Mhz-868-915MHz-with-Internal-Antenna-and-MCX-External-Antenna-Port/3226069_32953098569.html?spm=a2g1y.12024536.productList_5885011.pic_2)**
 
 ## Description
 
@@ -132,6 +130,6 @@ void loop() {
 }
 ```
 
-<!-- ## Schematic -->
+## Schematic
 
-<!-- <img src="assets/img/product_pics/module/gps_sch.png"> -->
+<img src="assets/img/product_pics/module/lorawan_sch.png">

docs/en/module/plus.md

@@ -1,12 +1,10 @@
-# M5Stack PLUS
+# PLUS
 
 <img src="assets/img/product_pics/module/module_plus_01.png" width="30%" height="30%"> <img src="assets/img/product_pics/module/module_plus_02.png" width="30%" height="30%">
 
 ***
 
-:memo:**[Description](#Description)**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;:octocat:**[Example](#Example)**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;🛒**[Purchase](https://www.aliexpress.com/store/product/M5Stack-New-Arrival-PLUS-Module-Encoder-Module-with-MEGA328P-500mAh-Battery-ISP-IR-Transmitter-UART-GPIO/3226069_32949278724.html?spm=a2g1x.12024536.productList_5885013.pic_1)**
-
-<!-- :memo:**[Description](#Description)**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;:octocat:**[Example](#Example)**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;:electric_plug:**[Schematic](#Schematic)**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;🛒**[Purchase](https://www.aliexpress.com/store/product/M5Stack-New-Arrival-PLUS-Module-Encoder-Module-with-MEGA328P-500mAh-Battery-ISP-IR-Transmitter-UART-GPIO/3226069_32949278724.html?spm=a2g1x.12024536.productList_5885013.pic_1)** -->
+:memo:**[Description](#Description)**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;:octocat:**[Example](#Example)**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;:electric_plug:**[Schematic](#Schematic)**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;🛒**[Purchase](https://www.aliexpress.com/store/product/M5Stack-New-Arrival-PLUS-Module-Encoder-Module-with-MEGA328P-500mAh-Battery-ISP-IR-Transmitter-UART-GPIO/3226069_32949278724.html?spm=a2g1x.12024536.productList_5885013.pic_1)**
 
 ## Description
 
@@ -33,7 +31,7 @@ This a enhanced module including battery(500mAh), gear potentiometer, IR transmi
 
 ## Example
 
-### 1. Arduino IDE
+### Arduino IDE
 
 *The below code `plus_read_encoder.ino` is incomplete(just for usage). If you want the complete code, please click [here](https://github.com/m5stack/M5-ProductExampleCodes/tree/master/Module/PLUS/Arduino).*
 
@@ -70,4 +68,8 @@ while(Wire.available()) {
         press = 1;//encoder was releaed
     }
 }
-```
+```
+
+## Schematic
+
+<img src="assets/img/product_pics/module/plus_sch.png">

docs/en/module/servo.md

@@ -4,9 +4,7 @@
 
 ***
 
-:memo:**[Description](#Description)**      :octocat:**[Example](#Example)**      🛒**[Purchase](https://www.aliexpress.com/store/product/M5Stack-New-SERVO-Module-Board-12-Channels-Servo-Controller-with-MEGA328-Inside-Power-Adapter-6-24V/3226069_32951356502.html?spm=a2g1y.12024536.productList_5885011.pic_0)**
-
-<!-- :memo:**[Description](#Description)**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;:octocat:**[Example](#Example)**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;:electric_plug:**[Schematic](#Schematic)**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;🛒**[Purchase](https://www.aliexpress.com/store/product/M5Stack-New-SERVO-Module-Board-12-Channels-Servo-Controller-with-MEGA328-Inside-Power-Adapter-6-24V/3226069_32951356502.html?spm=a2g1y.12024536.productList_5885011.pic_0)** -->
+:memo:**[Description](#Description)**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;:octocat:**[Example](#Example)**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;:electric_plug:**[Schematic](#Schematic)**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;🛒**[Purchase](https://www.aliexpress.com/store/product/M5Stack-New-SERVO-Module-Board-12-Channels-Servo-Controller-with-MEGA328-Inside-Power-Adapter-6-24V/3226069_32951356502.html?spm=a2g1y.12024536.productList_5885011.pic_0)**
 
 ## Description
 
@@ -67,4 +65,6 @@ Wire.write(angle);//0-180°
 Wire.endTransmission();
 ```
 
-<!-- ## Schematic -->
+## Schematic
+
+<img src="assets/img/product_pics/module/servo_sch.png">