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Updated initialization of PCA9536 in setup #1

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Updated initialization of PCA9536 in setup #1

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13 changes: 8 additions & 5 deletions Particle/PCA9536_R21.ino
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Original file line number Diff line number Diff line change
Expand Up @@ -14,19 +14,22 @@ void setup()
{
// Set variable
Particle.variable("i2cdevice", "PCA9536_R21");

// Initialise I2C communication
Wire.begin();
// Initialise Serial Communication, set baud rate = 9600
Serial.begin(9600);
// Initialise I²C communication
Wire.begin();

// Turn off all channels prior to initialization of chip so relays do not turn on after initializing channels to outputs.
Wire.beginTransmission(Addr);
Wire.write(0x01);
Wire.write(0x00);
Wire.endTransmission();

// Start I2C transmission
Wire.beginTransmission(Addr);
// Select configuration register
Wire.write(0x03);
// Set all pins as OUTPUT
Wire.write(0x00);
// Stop I2C transmission
Wire.endTransmission();
delay(300);
}
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