1  wireless TX/general I/O      17 ADC Data in
2  wireless RX/general I/O      18 ADC Data out
3  motor 1 enable               19 IO expander SDA
4  motor 1 a                    20 IO expander SCL
5  motor 1 b                    21 general I/O
6  motor 2 enable               22 general I/O
7  motor 2 a                    23 general I/O
8  motor 2 b                    24 general I/O
9   motor 3 enable              25 general I/O
10  mobor 3 a                   26 general I/O
11  motor 3 b                   27 general I/O
12  motor 4 enable              28 EEPROM/User IO board SCL
13  motor 4 a                   29 EEPROM/User IO board SDA
14  motor 4 b                   30 Wired TX  
15  adc CS                      31 Wired RX
16  adc CLK

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