Fix data size issue

main/main.ino

@@ -51,7 +51,7 @@ void send() {
     #endif
 
     ttn_cnt(count);
-    ttn_send(txBuffer, LORAWAN_PORT, confirmed);
+    ttn_send(txBuffer, sizeof(txBuffer), LORAWAN_PORT, confirmed);
 
     count++;
 }

main/ttn.ino

@@ -201,7 +201,7 @@ void ttn_cnt(unsigned char num) {
     LMIC_setSeqnoUp(num);
 }
 
-void ttn_send(uint8_t * data, uint8_t port, bool confirmed){
+void ttn_send(uint8_t * data, uint8_t data_size, uint8_t port, bool confirmed){
     // Check if there is not a current TX/RX job running
     if (LMIC.opmode & OP_TXRXPEND) {
         _ttn_callback(EV_PENDING);
@@ -210,7 +210,7 @@ void ttn_send(uint8_t * data, uint8_t port, bool confirmed){
 
     // Prepare upstream data transmission at the next possible time.
     // Parameters are port, data, length, confirmed
-    LMIC_setTxData2(port, data, sizeof(data), confirmed ? 1 : 0);
+    LMIC_setTxData2(port, data, data_size, confirmed ? 1 : 0);
             
     _ttn_callback(EV_QUEUED);
 }