Arduino MEGA 2560 Application Note

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©16March2017CO2Meter,Inc.AllRightsReserved 6
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int timeout=0; //set a timeoute counter
while(T66_Serial.available() < 5 ) //Wait to get a 7 byte response
{
timeout++;
if(timeout > 10) //if it takes to long there was probably an error
Serial.print("Timeout");
{
while(T66_Serial.available()) //flush whatever we have
T66_Serial.read();
break; //exit and try again
}
delay(50);
}
for (int i=0; i < 5; i++) response[i] = T66_Serial.read();
}
unsigned long getValue(byte packet[])
{
int high = packet[3]; //high byte for value is 4th byte in packet in the packet
int low = packet[4]; //low byte for value is 5th byte in the packet
unsigned long val = high*256 + low; //Combine high byte and low byte with this
formula to get value
return val;
}

Arduino MEGA 2560 Specifications

General

Microcontroller	ATmega2560
Operating Voltage	5V
Input Voltage (recommended)	7-12V
Input Voltage (limit)	6-20V
Digital I/O Pins	54
PWM Channels	15
Analog Input Pins	16
DC Current per I/O Pin	20 mA
DC Current for 3.3V Pin	50 mA
Flash Memory	256 KB of which 8 KB used by bootloader
SRAM	8 KB
EEPROM	4 KB
Clock Speed	16 MHz
LED_BUILTIN	13
Length	101.52 mm
Width	53.3 mm
Weight	37 g