remove_me image/svg+xml DFRobot Mega Sensor Shield v2.4 Breadboard View DFRobot Mega Sensor Shield v2.4 Breadboard View SD IIC SDA SCL GND 5V 5V 5V GND TX RX ICSP (COM0) (COM1) (COM2) ASSOC1 ASSOC3 ASSOC2  PWR MicroSD L 5V PWR_IN - + GND 3.3V 9 8 7 6 5 4 3 2 PWM + - 7 6 5 4 3 2 TX RX AREF GND 13 12 11 10 9 8 GND RESET 3V3 5V GND VIN A0 1 2 3 4 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 ANALOG   RST DIGITAL 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 GND VCC D GND VCC D GND VCC D 5     Xbee1 Xbee3 Xbee2 COM1 COM2 COM3 PWR 1 20 1 20 1 20