Question about cayenne triggers

hi shramik !!

i have copy and paste the code in the link that you send me ( https://community.mydevices.com/t/sending-mqtt-messages-within-notification-limit/11569

) and when i complie the code i have this error

crossedThreshold was not declare in this scope…

i never used ( bool ) in my code before …

is this the way to solve it ???

bool crossedThreshold;

or

bool crossedThreshold=false;

or

bool crossedThreshold = crossedThreshold;

???/

thank you for your help !!!