Not declared in scope, I have no idea why this isn't working

[Idahowalker]

Use code tags.

@rebecca1313

void setBrightnessI2C(byte value)
{
Wire.beginTransmission(s7sAddress);
Wire.write(0x7A); // Set brightness command byte
Wire.write(value); // brightness data byte
Wire.endTransmission();
}

{ <<<<<<<this is outside of the function
Wire.beginTransmission(s7sAddress);
Wire.write(0x77);
Wire.write(decimals);
Wire.endTransmission();
}

Can you see how this function is incorrect with where the { and }.

Please post your code in code tags.

@rebecca1313

void s7sSendStringI2C(String toSend)
{
Wire.beginTransmission(s7sAddress);
for (int i=0; i<4; i++)
{
Wire.write(toSend[i]);
}
Wire.endTransmission();
}
void clearDisplayI2C()
{
Wire.beginTransmission(s7sAddress);
Wire.write(0x76); // Clear display command
Wire.endTransmission();
}

Again there is code outside of functions.

Use code tags.