ESP8266 Community Forum

Hello.

How I can compose a string with single instructions like chr(num)?
Is it the following right in syntax matter?

bla = chr(65) & chr(66) & chr(67)

I was trying to pass from esp module to vb program trough UDP a string that is composed by some byte that should reflect some IO states like the following:

bla = chr(1) & chr(10) & chr(3)

but from the vb side I get only the first byte.


Thank You.
Marco.

The syntax you are using is correct.

the problem may lie in the fact that you are using characters under 32.

Why not just send as a string?

Hello.

Might be I got the matter, is actually chr(0), I just tried it and the string will get truncated at the chr(0), I think because the 0 is use to terminate the string parsing. I compose already a string but the problem is that if I
deal for example with modbus protocol a lot of times it will use the zero as returning value from coil or registers, by the way here below what's going on:

bla = chr(1) & chr(2) & chr(3) & chr(4) & chr(5) ' i got it right
bla = chr(1) & chr(2) & chr(0) & chr(4) & chr(5) ' i got until chr(2) so 12 the rest will be truncated

Can you send a string over instead of the characters.