Convert usigned integer( uint16_t) to string. Standard itoa base 10 is giving negative values

Question

I need to convert uint16_t value to a string. I want the string to be a decimal respresentation of the number.

Example: uint16_t i=256 string: 256

I tried with itoa(i,string, 10) but when i value increases starts printing negative values.
I send the string via the Serial Port.(UART)
It is there some alternative?

Solution

Use sprintf with %u format for unsigned int:

uint16_t i = 33000;
sprintf(str, "%u", i);

Comments

[sameerkn]

use snprintf(str, sizeof(str), "%d", i); even though buffer overflow chance are less.

[Sergei Bubenshchikov]

@sameerkn, please share link to a library, where you found snprintf function with presented prototype

[user3278790]

I'm not sure, but in muy case is for firmware, I want to send the string by the Serial port, snprintf I guess it doesn't work in this case....

[phuclv]

no, the correct format specifier for uint16_t is PRIu16: printf("%" PRIu16 "\n", i);