Fix float literals and implicit conversions #213
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Currently there is a lot of double literals all over the codebase, which need to be implicitly converted to floats in all caclucations with float variables.
This PR changes
pow->powf,sqrt->sqrtf)Those changes mostly impact the heat index calculation (
computeHeatIndex()) which runs around 2x faster with the proposed changes on my Arduino MKR1000 WiFi.