Merge pull request #29 from fablabbcn/dev-sd

SD documentation updated

Author: pral2a

.DS_Store

@@ -10,7 +10,7 @@ This firmware is aimed to people wanting to log data in off-line mode, without i
 
 1. **microSD**: We recomend formating **micro SD** cards using the official SD tool you can download [here](https://www.sdcard.org/downloads/formatter_4/).
 
-2. **RTC**: Place a **CR1220** cell battery on your kit. Before uploading the SD firmware use the on-line configuration tool to set your Wi-Fi credentials. Your kit will connect to the internet and sync its the internal clock with our remote servers.
+2. **RTC**: Place a **CR1220** cell battery on your kit. Before uploading the SD firmware use the on-line configuration tool at [smartcitizen.me](https://smartcitizen.me) to set your Wi-Fi credentials. Your kit will connect to the internet and sync its the internal clock with our remote servers.
 
 3. You can now install the **SD firmware** using the Arduino IDE. Ready!