Hardware: + SFE Red Board (https://www.sparkfun.com/products/12757) + HamShield (http://hamshield.com/) with RDA1846 RF TXR (2m, 1.25m, 70cm) + SFE button shield (https://www.sparkfun.com/products/13293) Pins: A0: LCD shield buttons A1: nCS for the RDA1846 A2: analog input from HamShield A3: RST for RDA1846 A4: DAT for RDA1846 A5: CLK for RDA1846 D0: D1: D2: D3: D4: LCD bit 4 D5: LCD bit 5 D6: LCD bit 6 D7: LCD bit 7 D8: LCD RS D9: LCD enable D10: LCD backlight brightness adjust D11: D12: D13: D14: D15: