The article that this one references as an example of what you should probably avoid hints at one “trick” that actually is a good idea: avoiding floating point.
Small micrcocontrollers typically don’t have floating point units. As a result, all floating point operations are done in software. The article mentions the small space savings, but then neglects to mention the real savings: not linking in the floating point routines. Add to this the fact that floating point arithmetic is much more subtle than it looks, and not using floating point values is a win.
Another reason is to be able to compare results across machines/setups/… without having to mess with an ‘epsilon’ value etc. If such comparisons aren’t needed, one can simply calculate a hash locally, send those over the network and compare that, instead of sending over all the data.