Adding links

README.md

@@ -1,6 +1,6 @@
 # Introduction
 
-This is the source code of ZUMspot/MMDVM_HS, personal hotspot (ADF7021 version of the MMDVM firmware), based on Jonathan G4KLX's MMDVM software. This firmware supports D-Star, DMR, System Fusion and P25 digital modes.
+This is the source code of ZUMspot/MMDVM_HS, personal hotspot (ADF7021 version of the MMDVM firmware), based on Jonathan G4KLX's [MMDVM](https://github.com/g4klx/MMDVM) software. This firmware supports D-Star, DMR, System Fusion and P25 digital modes.
 
 This software is intended to be run on STM32F103 microcontroller. You can build this code using Arduino IDE with STM32duino package, or using "make" with ARM GCC tools. Also, Arduino with 3.3 V I/O (Arduino Due and Zero) and Teensy (3.1, 3.2, 3.5 or 3.6) are supported.
 
@@ -10,7 +10,7 @@ This software is licenced under the GPL v2 and is intended for amateur and educa
 
 - Supported modes: D-Star, DMR, Yaesu Fusion and P25 Phase 1
 - Automatic mode detection (scanning)
-- G4KLX software suite: MMDVMHost, ircDDBGateway, YSFGateway, P25Gateway and DMRGateway
+- G4KLX software suite: [MMDVMHost](https://github.com/g4klx/MMDVMHost), [ircDDBGateway](https://github.com/dl5di/OpenDV), [YSFGateway](https://github.com/g4klx/YSFClients), [P25Gateway](https://github.com/g4klx/P25Clients) and [DMRGateway](https://github.com/g4klx/DMRGateway)
 - Bands: 144, 220, 430 and 900 MHz (VHF requires external inductor)
 - Status LEDs (PTT, COR and digital modes)
 - Serial repeater port for Nextion displays
@@ -24,7 +24,7 @@ The ADF7021 (or RF7021SE module) must operate with a 14.7456 MHz TCXO and with a
 
 The jumper wire to CLKOUT in RF7021SE module is not longer required for lastest MMDVM_HS firmware. But CE pin connection of ADF7021 is required for proper operation of ZUMspot.
 
-Be aware that some Blue Pill STM32F103 board are defectives. If you have trouble with USB, please check this: http://wiki.stm32duino.com/index.php?title=Blue_Pill
+Be aware that some Blue Pill STM32F103 board are defectives. If you have trouble with USB, please check [this](http://wiki.stm32duino.com/index.php?title=Blue_Pill).
 
 VHF (144-148 MHz) support for ZUMSpot is added by an external 18 nH inductor between L1 and L2 pins of ADF7021. This will enable dual band (VHF/UHF) operation.
 
@@ -34,19 +34,19 @@ If you can't decode any 4FSK modulation (DMR, YSF and P25) with your ZUMspot, th
 
 # Quick start
 
-Please see [BUILD.md](BUILD.md) for more details, and also MMDVM Yahoo Groups. You also can check at MMDVM_HS/scripts folder for some automatic tasks.
+Please see [BUILD.md](BUILD.md) for more details, and also [MMDVM](https://groups.yahoo.com/neo/groups/mmdvm/info) Yahoo Groups. You also can check at MMDVM_HS/scripts folder for some automatic tasks.
 
 ## Binary firmware installation
 
 Please check the latest firmware:
 
-    https://github.com/juribeparada/MMDVM_HS/releases
+    [https://github.com/juribeparada/MMDVM_HS/releases](https://github.com/juribeparada/MMDVM_HS/releases)
 
 ### Windows
 
 Download the ZUMspotFW firmware upgrade utility (ZUMspotFW_setup.exe) from the releases section:
 
-    https://github.com/juribeparada/MMDVM_HS/releases/download/v1.0.2/ZUMSpotFW_setup.exe
+    [https://github.com/juribeparada/MMDVM_HS/releases/download/v1.0.2/ZUMSpotFW_setup.exe](https://github.com/juribeparada/MMDVM_HS/releases/download/v1.0.2/ZUMSpotFW_setup.exe)
 
 This utility includes firmwares binaries and USB drivers for Windows 7/8/10. If you have problems with the installer, you can download ZUMspotFW.zip for a manual installation.
 
@@ -83,7 +83,7 @@ You could check at MMDVM_HS/configs for common Config.h examples, using differen
 
 Please check here for detailed instructions:
 
-    https://github.com/mathisschmieder/MMDVM_HS_Hat/blob/master/README.md
+    [https://github.com/mathisschmieder/MMDVM_HS_Hat/blob/master/README.md](https://github.com/mathisschmieder/MMDVM_HS_Hat/blob/master/README.md)
 
 ### ZUMspot Libre Kit (under Linux Raspbian)