Serialized Data Buffer

#include <stdio.h>
#include <stdint.h>

void build_packet(uint8_t command, uint16_t value, uint8_t status, uint32_t checksum) {
    uint8_t buffer[10];

	buffer[0] = 0xA5;
	buffer[1] = command;
	uint8_t *ptr = (uint8_t*)&value;
	buffer[2] = *ptr;
	buffer[3] = *(++ptr);
	buffer[4] = status;
	ptr = (uint8_t*)&checksum;
	for (int i = 0; i < 4; i++)
	{
		buffer[5 + i] = *ptr;
		ptr++;
	}
	buffer[9] = 0x5A;
	
	for (int i = 0; i < 10; i++)
    {
        printf("%hhu ", buffer[i]);
    }
    printf("\n");
}

int main() {
    uint8_t cmd, status;
    uint16_t val;
    uint32_t crc;

    scanf("%hhu %hu %hhu %u", &cmd, &val, &status, &crc);
    build_packet(cmd, val, status, crc);
    return 0;
}