Or don't use an array at all. Use a struct and give the data meaningful names instead of an anonymous array index
struct dataLayout
{
byte state = 1;
byte batPercent = 100;
int batMv = 4217;
byte rssi = 22;
byte sms = 11;
char * lock = "locked";
char * light = "ON";
} data;
char outBuffer[100];
void setup()
{
Serial.begin(115200);
printData();
data.light = "OFF";
printData();
data.rssi = 23;
data.batMv = 1234;
data.lock = "unlocked";
printData();
}
void loop()
{
}
void printData()
{
sprintf(outBuffer, "State = %d, Bat(%%) = %d, Bat(mV) = %d, RSSI = %d, SMS# = %d, Lock = %s, Light = %s",
data.state, data.batPercent, data.batMv, data.rssi, data.sms, data.lock, data.light);
Serial.println(outBuffer);
}