//Canbus.ecu_req(state[check % 3].pid, state[check % 3].buffer);
strcpy(state[check % 3].buffer, "HELLO !");
state[check % 3].time = millis();
state[check % 3].f1 = SD.open(state[check % 3].sdName, FILE_WRITE);     //  Open vehicles' variables sd file
state[check % 3].f2 = SD.open(state[check % 3].sdTimeName, FILE_WRITE);     // Open vehicles' variables time file
if (state[check % 3].f1 && state[check % 3].f2) {
    state[check % 3].f1.println(state[check % 3].buffer);   // Write pid values
    state[check % 3].f2.println(state[check % 3].time);     // Write time values
    Serial.println(state[check % 3].buffer);
}