String myStr = "sc1.00!0.01@0.02#-0.10e"; String myStr2 = "sd1.00!0.03@0.10#-0.05e"; void setup() { // put your setup code here, to run once: Serial3.begin(115200); } void loop() { // put your main code here, to run repeatedly: Serial3.print(myStr); Serial3.print(myStr2); delay(25); }