diff --git a/docs/en/module/gps.md b/docs/en/module/gps.md
index a1be7fbc..067f1f89 100644
--- a/docs/en/module/gps.md
+++ b/docs/en/module/gps.md
@@ -42,6 +42,8 @@ global positioning information even you in the wild and get lost.
 
 -  **[GPS Info](https://www.u-blox.com/zh/product/neo-m8-series)** (GPS)
 
+- **[TinyGPS++ library](http://arduiniana.org/libraries/tinygpsplus/)**
+
 ## Example
 
 ### Arduino IDE
diff --git a/docs/en/unit/gps.md b/docs/en/unit/gps.md
index ddd457b7..2304cc7a 100644
--- a/docs/en/unit/gps.md
+++ b/docs/en/unit/gps.md
@@ -35,6 +35,8 @@
 
 - **[Datasheet]** - [AT6558](http://www.icofchina.com/d/file/xiazai/2016-12-05/b1be6f481cdf9d773b963ab30a2d11d8.pdf) - [MAX2659](https://datasheets.maximintegrated.com/en/ds/MAX2659.pdf)
 
+- **[TinyGPS++ library](http://arduiniana.org/libraries/tinygpsplus/)**
+
 - **[CASIC multimode satellite navigation receiver protocol specification](http://www.icofchina.com/d/file/xiazai/2017-05-02/ea0cdd3d81eeebcc657b5dbca80925ee.pdf)**
 
 - **[GnssToolKit3(Windows Version)](http://www.icofchina.com/d/file/xiazai/2018-05-23/2b29a8da746eec0ef1dcd9deae895298.zip)**
diff --git a/docs/zh_CN/faq.md b/docs/zh_CN/faq.md
index cdc04e7c..9aab1156 100644
--- a/docs/zh_CN/faq.md
+++ b/docs/zh_CN/faq.md
@@ -50,4 +50,7 @@
 
     https://github.com/m5stack/M5-Schematic/blob/master/Core/hardware_diff_between_m5cores.md
 
+- Q. 有些模块与Core堆叠之后不能下载程序，比如USB模块与Core堆叠
+- A. 可能是堆叠之后，接触不好，M5-Bus总线有GPIO0，接触不好的时候，GPIO0的时序不对，下载的时候要手动GPIO0连接GND，保证足够长时间拉低
+
 --- -->
\ No newline at end of file
diff --git a/docs/zh_CN/module/gps.md b/docs/zh_CN/module/gps.md
index 116803e4..2b502eaa 100644
--- a/docs/zh_CN/module/gps.md
+++ b/docs/zh_CN/module/gps.md
@@ -35,7 +35,9 @@ GPS Module内部默认是通过UART2(GPIO16, GPIO17)与M5Core通讯，你可以
 
 - **[官方论坛](http://forum.m5stack.com/)**
 
--  **[GPS Info](https://www.u-blox.com/zh/product/neo-m8-series)** (GPS)
+- **[GPS Info](https://www.u-blox.com/zh/product/neo-m8-series)** (GPS)
+
+- **[TinyGPS++库官网](http://arduiniana.org/libraries/tinygpsplus/)**
 
 ## 例程
 
diff --git a/docs/zh_CN/unit/gps.md b/docs/zh_CN/unit/gps.md
index af2c4ea2..19af7fbd 100644
--- a/docs/zh_CN/unit/gps.md
+++ b/docs/zh_CN/unit/gps.md
@@ -35,6 +35,8 @@
 
 - **[数据手册]** - [AT6558](http://www.icofchina.com/d/file/xiazai/2016-12-05/b1be6f481cdf9d773b963ab30a2d11d8.pdf) - [MAX2659](https://datasheets.maximintegrated.com/en/ds/MAX2659.pdf)
 
+- **[TinyGPS++库官网](http://arduiniana.org/libraries/tinygpsplus/)**
+
 - **[CASIC多模卫星导航接收机协议规范](http://www.icofchina.com/d/file/xiazai/2017-05-02/ea0cdd3d81eeebcc657b5dbca80925ee.pdf)**
 
 - **[上位机软件GnssToolKit3(Windows版本)](http://www.icofchina.com/d/file/xiazai/2018-05-23/2b29a8da746eec0ef1dcd9deae895298.zip)**