doc(readme): add small precisions

README.md

 # MechaRaptor controller
 
-The **MechaRaptor** is a tandem flapping wing system built for my Ph.D. at the
+The **MechaRaptor** is a tandem flapping wings system built for my Ph.D. at the
 University of Liège. The goal of this setup is to conduct experimental analysis
-of the aerodynamics of tandem flapping wings and better understand the wake
-dynamics and how it impacts the lift and drag of the aft wing.
+of the aerodynamics of such configuration and better understand the wake
+dynamics and its impact on the performance of the aft wing.
 
 The system is actuated by two sets of brushless DC motors (BLDC), each
 controlled with an Engine Speed Controller (ESC). The ESCs are themselves
-controlled using an Arduino Uno. The Arduino acts as the brain of the whole
-system and is the main interface for piloting the setup and logging important
+controlled using an Arduino Uno, which acts as the "brain" of the whole system.
+This Arduino is the main interface for piloting the setup and logging important
 metrics.
 
 This repository contains the Arduino code and the wiring schematics for the
@@ -22,7 +22,9 @@ electrical components of the setup.
   position of the wings.
 
 _Note: A maximum rotation speed is imposed to the BLDC by the ESC. This value
-has been manually set for each ESC using the ESC's terminal (JETIBOX)._
+has been manually set for each ESC using the ESC's terminal (JETIBOX). This
+value is reflected in the Arduino code as well, in so the inputs and outputs are
+calibrated properly._
 
 ## Usage
 
@@ -33,6 +35,12 @@ Before powering the Arduino, set the ON/OFF switch in the appropriate position:
 
 Further switch changes during the Arduino runtime will not be accounted for.
 
+Then turn plug the ESCs power using batteries or DC power supply.
+
+If the setup is in manual mode, the potentiometer must be turned all the way
+down to initiate the setup. If it is in automatic mode, it will wait for a
+serial connection and initial user input.
+
 ### Manual mode
 
 In this mode, the potentiometer is used to control the motors. When it is turned
@@ -49,8 +57,11 @@ desired frequency and will use that value to control the motors. The
 potentiometer is completely bypassed.
 
 **To turn off the motor, send 0 to the console at any moment.** This
-will first decrease the RPM to a moderate speed and then turn off completely
-the motor.
+will first decrease the RPM to a moderate speed for three seconds. Then the
+motor will be turned off completely.
+Once the motor is completely stopped, the system will lock itself to prevent
+any accidental re-start. To start another run, close the serial connection and
+re-open a new one.
 
 ## Data logging and visualization
 
@@ -85,7 +96,7 @@ allows the automatic logging and retention of all data in _csv_ spreadsheets.
 
 ## Schematics
 
-To Do (January 2023)
+To Do (ETA January 2023)
 
 [plettenberg]: <https://plettenbergmotors.com/>
 [serial-studio]: <https://serial-studio.github.io/>