Class Instantiation

MC7940;

The MCP7940 class has no parameters. It uses I2C where the 2 wires are predefined and has a fixed I2C address. Instantiating the class does not check to see if the MCP7940 is actually present, that is done as part of the begin() method.

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Example:

MCP7940_Class MCP7940; // Create an instance of the MCP7940
...
void setup() {
  Serial.begin(SERIAL_SPEED);
  while (!MCP7940.begin()) { // Initialize RTC communications
    Serial.println("Unable to find MCP7940. Checking again in 1 second.");
    delay(1000);
  } // of loop until device is located
...