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#include <Arduino.h>
#include <SPI.h>
#include <RF24.h>
#include <U8g2lib.h>
#include <WiFi.h>
#include "esp_bt.h"
// ================= NRF24 =================
#define CE1_PIN 10
#define CSN1_PIN 11
#define CE2_PIN 12
#define CSN2_PIN 13
#define NRF_SCK 18
#define NRF_MISO 16
#define NRF_MOSI 17
// ================= OLED ==================
#define OLED_SDA_PIN 8
#define OLED_SCL_PIN 9
// ================= Buttons ===============
#define BTN_UP 4
// =========================================
// Third radio optional
#define CE3_PIN 46
#define CSN3_PIN 48
SPIClass *NRF_SPI = nullptr;
// RF24 radios
RF24 RadioA(CE1_PIN, CSN1_PIN);
RF24 RadioB(CE2_PIN, CSN2_PIN);
// OLED
U8G2_SSD1306_128X64_NONAME_F_HW_I2C u8g2(
U8G2_R0,
U8X8_PIN_NONE,
OLED_SCL_PIN,
OLED_SDA_PIN
);
enum OperationMode {
DEACTIVE_MODE,
BLE_MODULE,
Bluetooth_MODULE
};
OperationMode currentMode = DEACTIVE_MODE;
// BLE advertising channels
const byte ble_channels[] = {2, 26, 80};
// Bluetooth hopping channels
//const byte bluetooth_channels[] = {
// 32, 34, 46, 48, 50, 52,
// 0, 1, 2, 4, 6, 8,
// 22, 24, 26, 28, 30,
// 74, 76, 78, 80
//};
const byte bluetooth_channels[] = {
12, 17, 22, 27, 32,
37, 42, 47, 52, 57,
62, 67, 72
};
volatile bool modeChangeRequested = false;
unsigned long lastButtonPressTime = 0;
const unsigned long debounceDelay = 500;
// =========================================
// NRF CONFIG
// =========================================
void configureNrf(RF24 &radio) {
radio.begin(NRF_SPI);
radio.setAutoAck(false);
radio.stopListening();
radio.setRetries(0, 0);
radio.setPALevel(RF24_PA_MAX);
radio.setDataRate(RF24_2MBPS);
radio.disableCRC();
}
// =========================================
void IRAM_ATTR handleButtonPress() {
unsigned long currentTime = millis();
if (currentTime - lastButtonPressTime > debounceDelay) {
modeChangeRequested = true;
lastButtonPressTime = currentTime;
}
}
// =========================================
void configureRadio(RF24 &radio) {
configureNrf(radio);
radio.startConstCarrier(
RF24_PA_MAX,
40
);
}
// =========================================
void initializeRadios() {
if (currentMode == DEACTIVE_MODE) {
RadioA.powerDown();
RadioB.powerDown();
return;
}
configureRadio(RadioA);
configureRadio(RadioB);
}
// =========================================
void updateOLED() {
u8g2.clearBuffer();
u8g2.setFont(u8g2_font_6x10_tr);
u8g2.setCursor(0, 12);
u8g2.print("Mode:");
u8g2.setCursor(50, 12);
if (currentMode == BLE_MODULE) {
u8g2.print("BLE");
}
else if (currentMode == Bluetooth_MODULE) {
u8g2.print("BT");
}
else {
u8g2.print("OFF");
}
u8g2.setCursor(0, 30);
u8g2.print("R1:");
u8g2.print(RadioA.isChipConnected());
u8g2.setCursor(0, 45);
u8g2.print("R2:");
u8g2.print(RadioB.isChipConnected());
u8g2.setCursor(0, 60);
u8g2.print("R3:");
u8g2.sendBuffer();
}
// =========================================
void checkModeChange() {
if (!modeChangeRequested)
return;
modeChangeRequested = false;
currentMode =
static_cast<OperationMode>(
(currentMode + 1) % 3
);
initializeRadios();
updateOLED();
}
// =========================================
// SETUP
// =========================================
void setup() {
Serial.begin(115200);
// Disable ESP32 radios
esp_bt_controller_deinit();
WiFi.mode(WIFI_OFF);
btStop();
// SPI
NRF_SPI = new SPIClass(FSPI);
NRF_SPI->begin(
NRF_SCK,
NRF_MISO,
NRF_MOSI
);
// OLED
u8g2.begin();
// Button
pinMode(BTN_UP, INPUT_PULLUP);
attachInterrupt(
digitalPinToInterrupt(BTN_UP),
handleButtonPress,
FALLING
);
initializeRadios();
updateOLED();
Serial.println("Jammer initialized");
}
// =========================================
// LOOP
// =========================================
void loop() {
checkModeChange();
if (currentMode == BLE_MODULE) {
byte channel =
ble_channels[
random(
sizeof(ble_channels)
)
];
RadioA.setChannel(channel);
RadioB.setChannel(channel);
}
else if (currentMode == Bluetooth_MODULE) {
byte channel =
bluetooth_channels[
random(
sizeof(bluetooth_channels)
)
];
RadioA.setChannel(channel);
RadioB.setChannel(channel);
}
delay(5);
}
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