Webhook Problem with "&" and "="

You had a literal for ID and that’s the reason why I wrote the above exactly the way I wrote it and not any other way :wink:

The way you wrote it would just result in ...?ID=id&...

If you want to have a variable you need to use a variable in that statement and not another string literal.

char data[256];
char id[24] = "IWATTWIL26";
char pwd[] = "xxxxxxxx";
int  humidity = 90;
snprintf(data, sizeof(data)
        ,"{\"id\":\"%s\""
         ",\"pwd\":\"%s\""
         ",\"dt\":\"%s\""
         ",\"hum\":%d"
         "}"
        ,id
        ,pwd
        ,"now"
        ,humidity
        );
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