code not compiling

[gregruthenium]

Hi.

I managed to edit most of the code to make it work but Im stuck with the following error

Compilation error: 'ERR_DATALENGTH' was not declared in this scope

o {
ret = sps30.GetValues(&val);
if (ret == ERR_DATALENGTH){
if (error_cnt++ > 3) {
return(false); //error during reading sps30 values
}
delay(1000);
}
else if(ret != ERR_OK) {
return(false); //error during reading sps30 values
}
} while (ret != ERR_OK);

massPM2 = val.MassPM2;
massPM10 = val.MassPM10 - val.MassPM2; //PM10 - PM2 to see all particles between 2.5 to 10 micrometer
return true;
}

Can you please help me as this is part of the code you uploaded?

Cheers