List of all pins of the DSUB15 connector.
 sorted by pin number  
 1  ==> Supply   - V5V  (                 5V)
 2  ==> Supply   - Vcc  (    battery voltage)
 3  ==> Supply   - GND  (      common ground)
 4  ==> UART     - TX   (RX of sensor module)
 5  ==> UART     - RX   (TX of sensor module)
 6  ==> SPI      - SCK  (       serial clock)
 7  ==> SPI      - MISO (master in slave out)
 8               - n.c. (      not connected)
 
 9  ==> Supply   - V5V  (                 5V)
10  ==> Supply   - Vcc  (    battery voltage)
11  ==> Supply   - GND  (      common ground)
12  ==> 
TWI      - SDA  (       serial  data)
 
13  ==> 
TWI      - SCL  (       serial clock)
 
14               - n.c. (      not connected)
15  ==> SPI      - MOSI (master out slave in)
 sorted by usage  
 1  ==> Supply   - V5V  (                 5V)
 9  ==> Supply   - V5V  (                 5V)
 
 2  ==> Supply   - Vcc  (    battery voltage)
10  ==> Supply   - Vcc  (    battery voltage)
 
 3  ==> Supply   - GND  (      common ground)
11  ==> Supply   - GND  (      common ground)
 
 
 4  ==> UART     - TX   (RX of sensor module)
 5  ==> UART     - RX   (TX of sensor module)
 
 
 6  ==> SPI      - SCK  (       serial clock)
 7  ==> SPI      - MISO (master in slave out)
15  ==> SPI      - MOSI (master out slave in)
 
 
12  ==> 
TWI      - SDA  (       serial  data)
 
13  ==> 
TWI      - SCL  (       serial clock)
 
 
 
 8               - n.c. (      not connected)
14               - n.c. (      not connected)