/*
  Arduino Wireless Communication Tutorial
  Example 1 - Receiver Code
  by Dejan Nedelkovski, www.HowToMechatronics.com
  Library: TMRh20/RF24, https://github.com/tmrh20/RF24/
*/

#include <SPI.h>
#include <nRF24L01.h>
#include <RF24.h>

#define CE_pin D6
#define CSN_pin D7

RF24 radio(CE_pin, CSN_pin); // CE, CSN
const int led_pin = D1;

const byte address[6] = "00001";


// ---
// H-bridge motor control, using the TB67H451FNG, should run with input 2-5V
// I'm using some geared "micro-motors", supposed to run at 3-7V (~30rpm).
#define FORWARD_PIN D4
#define BACKWARD_PIN D5

uint8_t dirn = 1; // direction, 1 or 0.
uint8_t state = 0; // state variable, so we can change direction when there is a new state.
// ---


void setup() {

  pinMode(led_pin, OUTPUT);
  Serial.begin(9600);
  radio.begin();
  radio.openReadingPipe(0, address);
  radio.setPALevel(RF24_PA_MIN);
  radio.startListening();


  // ---
  pinMode(FORWARD_PIN, OUTPUT);
  pinMode(BACKWARD_PIN, OUTPUT);
  // ---
}

void loop() {
  if (radio.available()) {
    char text[32] = "";
    radio.read(&text, sizeof(text));
    Serial.println(text);
    digitalWrite(led_pin, HIGH);

    // ---
    // spin motor forward
    digitalWrite(FORWARD_PIN, dirn);
    digitalWrite(BACKWARD_PIN, !dirn);
    delay(500);
    // ---

  }
  else {
    digitalWrite(led_pin, LOW);

    // ---
    // stop motor
    digitalWrite(FORWARD_PIN, LOW);
    digitalWrite(BACKWARD_PIN, LOW);
    // ---
  }
}