Keyestudio Ks0428, Manual

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character
{
digitalWrite(SCL_Pin,LOW); //pull down clock pin SCL Pin to
change the signals of SDA
delayMicroseconds(3);
if(send_data & 0x01) //set high and low level of SDA_Pin
according to 1 or 0 of every bit
{
digitalWrite(SDA_Pin,HIGH);
}
else
{
digitalWrite(SDA_Pin,LOW);
}
delayMicroseconds(3);
digitalWrite(SCL_Pin,HIGH); //pull up clock pin SCL_Pin to stop
transmitting data
delayMicroseconds(3);
send_data = send_data >> 1; // detect bit by bit, so move the
data right by one
}
}
//The sign that data transmission ends