Only vbat reads directly without using formula...

OpenFlightTX.ino

@@ -1003,7 +1003,7 @@ void read_all_voltage() {
     // roll_raw = analogRead(ROLL_PIN);
     // Hardcode to increase the value a bit...
     roll_raw = read_voltage(ROLL_PIN) + 150;
-    vbat_raw = read_voltage(VBAT_PIN);
+    vbat_raw = analogRead(VBAT_PIN);
 
     // Serial.print("T:");Serial.print(throttle_raw);Serial.print(" Y:");Serial.print(yaw_raw);Serial.print(" P:");Serial.print(pitch_raw);Serial.print("R:");Serial.println(roll_raw);