part of code void rec_tab(){ byte i=0,chk=0,j=0; while(1){ if (Serial.available()>0){ in_buff[j] = Serial.read(); chk^=in_buff[j]; j++; if (j==in_buff[1]+2) break; lcd.setCursor(0,1); lcd.print(chk,HEX); } } lcd.setCursor(0,0); lcd.print(" after break "); lcd.print(chk,HEX); } Why…

break

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