void md5i_iterate(int pass, int niter, unsigned char* out)
{
unsigned char a[4];
int32_to_char(pass,a);
md5_iterate(a,4,niter,out);
}
// ask power strip how much energy it has used between start_utc and
// end_utc, then print it out in kWh, as well as the cost in $.
void send_cmd_energy_query(time_t start_utc, time_t end_utc)
{
// fill send_buf with command and two dates
send_buf[0] = MASTER_COMMAND_ENERGY_QUERY;
int32_to_char(start_utc, send_buf + 1);
int32_to_char(end_utc, send_buf + 5);
send_to_client(send_buf, 9);
// now the result is in recv_buf
uint32_t result[4];
double total_kwh = 0;
for(int32_t i = 0; i < 3; i++)
{
// get the result out of recv_buf and print it out
result[i] = char_to_int32(recv_buf + i * 4);
double kwh = (double)result[i] / KWH_IN_J;
total_kwh += kwh;
printf("Socket %d: %.4fkWh, $%.4f\n", i+1, kwh, kwh * CENT_PER_KWH / 100);
}
printf(" Total: %.4fkWh, $%.4f\n", total_kwh, total_kwh * CENT_PER_KWH / 100);
}
// send current time to set the RTC in power strip
void send_cmd_set_time()
{
send_buf[0] = MASTER_COMMAND_SET_TIME;
int32_to_char(time(0), send_buf+1);
send_to_client(send_buf, 5);
}
