ESP8266 Community Forum

- Wed Mar 16, 2016 8:35 am #43299 Casting a "char *" to a "const uint8_t *" is not an issue, the write() will handle it has "const uins8_t *" simply because it won't write any thing into it.

- Wed Mar 16, 2016 11:16 am #43312 Thanks for the reply.

I have tried doing this as follows:

Code: Select allchar packet[] = {"\x16\x03\x01\x00\xf0"};
client.write(packet, sizeof(packet));

But I get compilation errors: http://i.imgur.com/dryQpwp.png

It's worth noting that the following works fine (but obviously I want to avoid having to use a const):

Code: Select allconst uint8_t packet[] = "\x16\x03\x01\x00\xf0";
client.write(packet, sizeof(packet));

- Wed Mar 16, 2016 1:02 pm #43317 The first example is simply wrong as you defined an array of pointer to string ...

As I said, simply do casting :

Code: Select allchar packet[] = "\x16\x03\x01\x00\xf0";
client.write((const uint8_t *)packet, sizeof(packet));