ESPNow sending double precision floating number

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ahenable asked 2 weeks ago

Using learn esp32 with arduino IDE
mod 10_1_2 sender
Changed Ln 21 float to double
Changed Ln 67 myData.c = 3.141592654
mod 10_1_3 receiver
Ln 16 from float to double c;
still receiving truncated 3.14 instead of 3.141592654
Could you help me to understand why.
Zoltan

3 Answers

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Sara Santos Staff answered 2 weeks ago

Hi.
I’m not sure what might be the issue.
Have you tried to send it as a char array and then convert it to a float number? That can be a workaround…

Regards,
Sara

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ahenable answered 2 weeks ago

I have done something similar to your solution.
as a float it sends out 3.14 NOT 3.141592654
Than
I defined as a double and multiplied the value by 1000 and on receive defined as double I divided by 1000
so I got the precision I wanted but it is not an elegant solution

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Sara Santos Staff answered 2 weeks ago

Hi.
Unfortuantely, I think these two solutions are the only way to go.
Regards,
Sara