add dev firmware for hpos app

firmware/sketch_aug4a/sketch_aug4a.ino

@@ -0,0 +1,10 @@
+void setup() {
+  // put your setup code here, to run once:
+  Serial.begin(115200);
+}
+
+void loop() {
+  // put your main code here, to run repeatedly:
+  Serial.println("RESULT SN 18291 1937.23 2828.11 28211.20 121829.12");
+  delay(3000);
+}