#include // first visible ASCIIcharacter '!' is number 33: char thisChar = 33; int main(void) { Serial.begin(115200); Serial.print("ASCII Table ~ Character Map\n"); while(true) { Serial.print(thisChar); Serial.print(", dec: %d", thisChar); Serial.print(", hex: %x", thisChar); Serial.print(", oct: %o", thisChar); Serial.print(", bin: %b\n", thisChar); if(thisChar++ == 126){ while(true); } } }