MQTT sending excessive decimal points

smartroad · June 2022

Hi

I have started to integrate Repetier Sever into my Home Assistant and I have noticed that sometimes the temperatures are reporting with 14 decimal points (currently I have it showing: 38.40000000000001). Is there anyway to reduce the DP to just 1 or 2?

Repetier_Support · June 2022

Hello. Currently you can't limit it from Repetier-Server side.
But have a look on examples and threads like this on home assistants side: https://community.home-assistant.io/t/howdoi-convert-mqtt-received-value-to-a-2-decimal-place-float/239368/5

smartroad · June 2022

Thanks, I'll look at that!

Out of interest why could Repetier Server send so many decimal points but only for a few numbers?

Repetier_Support · June 2022

We want to display the most exact number possible without rounding, so it can happen that float point errors will be displayed.
float point errors are machine dependent miscalculations by the computer itself like the famous: 1+2 = 3.0000000000000004

I will discuss with the team if we want to implement a correction method for those miscalculations for mqtt

MQTT sending excessive decimal points

Comments