Negative Floating point overflow

[rob_fox_cermag]

What is the range of a floating point value on the ESP32, using the Arduino IDE?

I get an overflow if I have a value below zero, which I do not get if I compile the same code for a Nano for example.

[ESP_Angus]

That doesn't sound quite right. 32-bit floats on ESP32 are IEEE754 single-precision format, so should include a lot of values below zero (down to very large negative numbers.)

Can you please post some code which exhibits this problem on ESP32 and not on other platforms?

[rob_fox_cermag]

I'm almost too embarrassed to reply, but, I was using a float which had a value assigned by a calculation which had an unsigned int as part of the equation. For some reason the Arduino Nano just dealt with this, but the ESP32 didn't.

Anyway, I've cast the unsigned int to a float in the calculation and it's fine now.

Silly mistake, it's the fact that it worked on the Nano that threw me.

[tele_player]

I’d be curious to see the expression. Type conversion/promotion/coercion is handled in the compiler.