diff --git a/lib/Transmitter/ITransmitter.h b/lib/Transmitter/ITransmitter.h
new file mode 100644
index 0000000..ac24ad0
--- /dev/null
+++ b/lib/Transmitter/ITransmitter.h
@@ -0,0 +1,18 @@
+#pragma once
+#include <stdint.h>
+#include <stddef.h>
+
+enum class TransmitError : int16_t {
+    OK           =  0,
+    INIT_FAILED  = -1,
+    JOIN_FAILED  = -2,
+    SEND_FAILED  = -3,
+};
+
+class ITransmitter {
+public:
+    virtual ~ITransmitter() = default;
+    virtual TransmitError init() = 0;
+    virtual TransmitError join() = 0;
+    virtual TransmitError send(uint8_t* payload, size_t size) = 0;
+};
\ No newline at end of file
diff --git a/lib/Transmitter/LoRaTransmitter.cpp b/lib/Transmitter/LoRaTransmitter.cpp
new file mode 100644
index 0000000..d241869
--- /dev/null
+++ b/lib/Transmitter/LoRaTransmitter.cpp
@@ -0,0 +1,76 @@
+#include <LoRaTransmitter.h>
+
+RTC_DATA_ATTR uint8_t LWsession[RADIOLIB_LORAWAN_SESSION_BUF_SIZE];
+
+LoRaTransmitter::LoRaTransmitter(
+    uint64_t joinEUI,
+    uint64_t devEUI,
+    uint8_t* nwkKey,
+    uint8_t* appKey
+)
+    : _joinEUI(joinEUI),
+      _devEUI(devEUI),
+      _radio(new Module(LORA_NSS, LORA_DIO0, LORA_RST, LORA_DIO1)),
+      _node(&_radio, &EU868)
+{
+    memcpy(_nwkKey, nwkKey, 16);
+    memcpy(_appKey, appKey, 16);
+}
+
+TransmitError LoRaTransmitter::init()
+{
+    _reset();
+    SPI.begin(LORA_SCK, LORA_MISO, LORA_MOSI, LORA_NSS);
+
+    Serial.print("[LoRaWAN] Init... ");
+    int state = _radio.begin();
+    if (state != RADIOLIB_ERR_NONE)
+    {
+        Serial.printf("ERREUR %d\n", state);
+        return TransmitError::INIT_FAILED;
+    }
+    Serial.println("OK");
+    return TransmitError::OK;
+}
+
+TransmitError LoRaTransmitter::join()
+{
+    int16_t state = RADIOLIB_ERR_NETWORK_NOT_JOINED;
+
+    _node.beginOTAA(_joinEUI, _devEUI, _nwkKey, _appKey);
+    state = _node.activateOTAA();
+    
+    if (state != RADIOLIB_LORAWAN_NEW_SESSION)
+    {
+        Serial.printf("Echec : %d\n", state);
+        return TransmitError::JOIN_FAILED;
+    }
+
+    Serial.println("OK");
+    return TransmitError::OK;
+}
+
+TransmitError LoRaTransmitter::send(uint8_t payload[], size_t size)
+{
+    int state = _node.sendReceive(payload, size, 1);
+    if (state == RADIOLIB_ERR_NONE || state == RADIOLIB_LORAWAN_NO_DOWNLINK)
+    {
+        Serial.println("[TX] OK");
+        return TransmitError::OK;
+    }
+    else
+    {
+        Serial.printf("[TX] Erreur : %d\n", state);
+        return TransmitError::SEND_FAILED;
+    }
+
+}
+
+void LoRaTransmitter::_reset()
+{
+    pinMode(LORA_RST, OUTPUT);
+    digitalWrite(LORA_RST, LOW);
+    delay(10);
+    digitalWrite(LORA_RST, HIGH);
+    delay(10);
+}
diff --git a/lib/Transmitter/LoRaTransmitter.h b/lib/Transmitter/LoRaTransmitter.h
new file mode 100644
index 0000000..4fba9dc
--- /dev/null
+++ b/lib/Transmitter/LoRaTransmitter.h
@@ -0,0 +1,37 @@
+#pragma once
+#include <ITransmitter.h>
+#include <SPI.h>
+#include <RadioLib.h>
+
+#define LORA_SCK  5
+#define LORA_MISO 19
+#define LORA_MOSI 27
+#define LORA_NSS  18
+#define LORA_RST  23
+#define LORA_DIO0 26
+#define LORA_DIO1 33
+
+class LoRaTransmitter : public ITransmitter {
+public:
+    LoRaTransmitter(
+        uint64_t joinEUI,
+        uint64_t devEUI,
+        uint8_t* nwkKey,
+        uint8_t* appKey
+    );
+
+    TransmitError init()                              override;
+    TransmitError join()                              override;
+    TransmitError send(uint8_t* payload, size_t size) override;
+
+private:
+    uint64_t _joinEUI;
+    uint64_t _devEUI;
+    uint8_t  _nwkKey[16];
+    uint8_t  _appKey[16];
+
+    SX1276      _radio;
+    LoRaWANNode _node;
+
+    void    _reset();
+};
\ No newline at end of file