Problème pour récupérer constante avec la fonction PROGMEM

Bonjour,

J’utilise une chaines de caractères pour mon affichage :

char* Niveau_Pause_myStrings[]={"1/1000", "1/800", "1/640","1/500", "1/400","1/320",
"1/250", "1/200", "1/160","1/125", "1/100","1/80", "1/60", "1/50", "1/40",
"1/30", "1/25","1/20","1/15","1/13", "1/10", "1/8","1/6", "1/5","1/4",
"1/3,2", "1/2,5", "1/2", "1/1,6","1/1,3", "1","1,3","1,6", "2", "2,5",
"3,2","4", "5","6","7", "8","9","10", "11","12","13", "14","15","16", 
"17","18","19", "20","21","22","23","24","25", "26","27","28", "29","30",
"31", "32","33","34", "35","36","37", "38","39", "40", "41","42","43","44",
"45","46","47","48","49", "50","51","52", "53","54","55", "56","57","58",
"59","60","61", "62","63","64", "65","66","67", "68","69","70","71","72",
"73","74","75","76","77","78","79","80","81","82","83","84","85","86","87",
"88","89","90","91","92","93","94","95","96","97","98","99","100","101",
"102","103","104","105","106","107","108","109","110","111","112","113",
"114","115","116","117","118","119","120"};

Le problème est que ça bouffe un max de SRAM, alors j’ai découvert la fonction PROGMEM de <avr/pgmspace.h> afin de tout mettre dans la mémoire Flash, mais il m’est impossible de mettre des “/” entre les chiffres, j’ai une erreur lors de la vérification…
Fonction PROGMEM → Référence Arduino français Main/PROGMEM

Je me réponds à moi même, j'avais oublié de rajouter le char* par rapport à l'exemple...donc forcément ça marchait pas^^

//Ecriture dans la mémoire Flash
char * const Niveau_Pause_myStrings[] PROGMEM={"1/1000", "1/800", "1/640","1/500", "1/400","1/320",
"1/250", "1/200", "1/160","1/125", "1/100","1/80", "1/60", "1/50", "1/40",
"1/30", "1/25","1/20","1/15","1/13", "1/10", "1/8","1/6", "1/5","1/4",
"1/3,2", "1/2,5", "1/2", "1/1,6","1/1,3", "1","1,3","1,6", "2", "2,5",
"3,2","4", "5","6","7", "8","9","10", "11","12","13", "14","15","16", 
"17","18","19", "20","21","22","23","24","25", "26","27","28", "29","30",
"31", "32","33","34", "35","36","37", "38","39", "40", "41","42","43","44",
"45","46","47","48","49", "50","51","52", "53","54","55", "56","57","58",
"59","60","61", "62","63","64", "65","66","67", "68","69","70","71","72",
"73","74","75","76","77","78","79","80","81","82","83","84","85","86","87",
"88","89","90","91","92","93","94","95","96","97","98","99","100","101",
"102","103","104","105","106","107","108","109","110","111","112","113",
"114","115","116","117","118","119","120"};


//Récupération d'une donnée et affichage
char * ptr = (char *) pgm_read_word (&Niveau_Pause_myStrings [Niveau_Pause]);
lcd.print(ptr);