RPi::WiringPi test platform GPIO pin connections

# I2C

SCL -> Arduino SCL
SDA -> Arduino SDA

# LCD

5 -> RS
6 -> E
4 -> D4
17 -> D5
27 -> D6
22 -> D7

# ADS1115 ADC

SCL -> SCL
SDA -> SDA
18 -> A0

# MCP3008 ADC

11 -> 13 (SCLK)
9  -> 12 (MISO)
10 -> 11 (MOSI)
26 -> 10 (CS)

# MCP4922 DAC

12 -> 3 (CS)
11 -> 4 (SCLK)
10 -> 5 (MOSI)

# 74HC595 Shift Register

21 -> 14 (DATA)
16 -> 12 (LATCH)
20 -> 11 (SHCP/CLK)

# Serial

14 -> 15 (Rx->Tx)

