Update sht20 source code, add both ioctl and read/write API support

guowenxue

2024-03-12 c5e9e88eb8c6039cd2a4d2b3fdae0b1e3d8aea40

 modules/leds.c

@@ -107,7 +107,7 @@
        printf("initial leds gpio failure, rv=%d\n", rv);
        return 1;
    }
    printf("initial RGB Led gpios okay\n", rv);
    printf("initial RGB Led gpios okay\n");

    signal(SIGINT,  sig_handler);
    signal(SIGTERM, sig_handler);