diff --git a/README.md b/README.md
index 82ba014..38704f9 100644
--- a/README.md
+++ b/README.md
@@ -99,7 +99,7 @@ Name | Return type | Description
 `writePin(pin, isHigh)` | - | Sets a `pin` to be high or not (when set as an output).
 `setSIInterrupts(isEnabled)` | - | If it `isEnabled`, a IRQ will be generated when `SI` changes from *HIGH* to *LOW*.
 
-⚠️ always set the SI terminal to an input!
+⚠️ always set the `SI` terminal to an input!
 
 # 🔗 LinkSPI
 
diff --git a/examples/LinkWireless_demo/src/main.cpp b/examples/LinkWireless_demo/src/main.cpp
index d514e07..60eb8b8 100644
--- a/examples/LinkWireless_demo/src/main.cpp
+++ b/examples/LinkWireless_demo/src/main.cpp
@@ -10,7 +10,7 @@ void connect();
 void messageLoop(bool acceptNewClients);
 void log(std::string text);
 void waitFor(u16 key);
-void vBlankWait();
+void vBlankWait();  // TODO: VBlankIntrWait();
 void hang();
 
 // (1) Create a LinkWireless instance
@@ -168,39 +168,40 @@ void connect() {
 }
 
 void messageLoop(bool acceptNewClients) {
-  u32 i = 50;
+  u32 i = acceptNewClients ? 50 : 15;
   bool sending = false;
 
   while (true) {
     u16 keys = ~REG_KEYS & KEY_ANY;
 
-    if (!sending && (keys & KEY_A)) {
+    if (!sending) {
       sending = true;
-      linkWireless->sendData(std::vector<u32>{1, i});
+      bool result = linkWireless->sendDataWait(std::vector<u32>{1, i});
+      log("Send result: " + std::to_string(result));
       i++;
-    }
-    if (sending && !(keys & KEY_A))
-      sending = false;
 
-    if (acceptNewClients) {
-      auto newConnection = linkWireless->acceptConnection();
-      if (!newConnection.success) {
-        log("Accept failed :(");
+      std::vector<u32> receivedData = std::vector<u32>{};
+      if (!linkWireless->receiveData(receivedData)) {
+        log("Receive failed :(");
         hang();
         return;
       }
-      if (newConnection.clientIds.size() > 1)
-        log("New connection: " + std::to_string(newConnection.clientIds[1]));
+      if (receivedData.size() > 1)
+        log("<<< " + std::to_string(receivedData[1]));
     }
+    if (sending)
+      sending = false;
 
-    std::vector<u32> receivedData = std::vector<u32>{};
-    if (!linkWireless->receiveData(receivedData)) {
-      log("Receive failed :(");
-      hang();
-      return;
-    }
-    if (receivedData.size() > 1)
-      log("<<< " + std::to_string(receivedData[1]));
+    // if (acceptNewClients) {
+    //   auto newConnection = linkWireless->acceptConnection();
+    //   if (!newConnection.success) {
+    //     log("Accept failed :(");
+    //     hang();
+    //     return;
+    //   }
+    //   if (newConnection.clientIds.size() > 1)
+    //     log("New connection: " + std::to_string(newConnection.clientIds[1]));
+    // }
 
     vBlankWait();
   }
diff --git a/lib/LinkSPI.h b/lib/LinkSPI.h
index 8137e51..dd71969 100644
--- a/lib/LinkSPI.h
+++ b/lib/LinkSPI.h
@@ -114,7 +114,7 @@ class LinkSPI {
       setInterruptsOff();
     }
 
-    enableTransfer();
+    // enableTransfer();
 
     while (isMaster() && waitMode && !isSlaveReady())
       if (cancel()) {
@@ -123,6 +123,7 @@ class LinkSPI {
         asyncState = IDLE;
         return LINK_SPI_NO_DATA;
       }
+    enableTransfer();  // TODO: MOVE HERE! AND TEST
 
     startTransfer();
 
@@ -180,6 +181,11 @@ class LinkSPI {
   void _setSOLow() { setBitLow(LINK_SPI_BIT_SO); }
   bool _isSIHigh() { return isBitHigh(LINK_SPI_BIT_SI); }
 
+  // TODO: CHANGE MODE ON THE FLY
+  void setSlaveMode2() { setBitLow(LINK_SPI_BIT_CLOCK); }
+  void setMasterMode2() { setBitHigh(LINK_SPI_BIT_CLOCK); }
+  void set2MbpsSpeed2() { setBitHigh(LINK_SPI_BIT_CLOCK_SPEED); }
+
  private:
   Mode mode = Mode::SLAVE;
   bool waitMode = false;
diff --git a/lib/LinkWireless.h b/lib/LinkWireless.h
index 0fa60a7..7147de3 100644
--- a/lib/LinkWireless.h
+++ b/lib/LinkWireless.h
@@ -147,7 +147,85 @@ class LinkWireless {
     return sendCommand(LINK_WIRELESS_COMMAND_SEND_DATA, data).success;
   }
 
+  bool sendDataWait(std::vector<u32> data) {
+    // TODO: IT WORKS RANDOMLY
+    // TODO: TEST THIS ON BOTH SIDES
+
+    if (!sendCommand(0x25, data).success)  // TODO: SEND DATA WAIT
+      return false;
+
+    linkSPI->setSlaveMode2();
+
+    u32 command = linkSPI->transfer(LINK_WIRELESS_DATA_REQUEST);
+    while (!linkSPI->_isSIHigh())
+      ;
+
+    if (msB32(command) != LINK_WIRELESS_COMMAND_HEADER) {
+      debug("NO HEADER: " + std::to_string(command));
+      while (true)
+        ;
+      linkSPI->activate(LinkSPI::Mode::MASTER_2MBPS);
+      return false;
+    }
+    if (lsB32(command) == 0x0027) {  // or 27 = inversion end
+      command = linkSPI->transfer(0x996600a7);
+      debug(">> RECEIVED: " + std::to_string(command));
+      while (!linkSPI->_isSIHigh())
+        ;
+      if (command != LINK_WIRELESS_DATA_REQUEST) {
+        debug("NO DATA REQUEST (END): " + std::to_string(command));
+        while (true)
+          ;
+        linkSPI->activate(LinkSPI::Mode::MASTER_2MBPS);
+        return false;
+      }
+
+      linkSPI->activate(LinkSPI::Mode::MASTER_2MBPS);
+
+      wait(LINK_WIRELESS_TRANSFER_WAIT);
+      return true;
+    }
+
+    if (lsB32(command) == 0x0128) {
+      linkSPI->transfer(LINK_WIRELESS_DATA_REQUEST);
+      while (!linkSPI->_isSIHigh())
+        ;
+    }
+
+    if (lsB32(command) != 0x0128 &&
+        lsB32(command) != 0x0028) {                // TODO: WAIT END RESPONSE
+      debug("NO 28: " + std::to_string(command));  // TODO: OR 29 = disconnected
+      while (true)
+        ;
+      linkSPI->activate(LinkSPI::Mode::MASTER_2MBPS);
+      return false;
+    }
+
+    // TODO: WAIT END ACK
+    command = linkSPI->transfer(0x996600a8);
+    while (!linkSPI->_isSIHigh())
+      ;
+    linkSPI->_setSOLow();
+
+    // // TODO: WAIT END ACK
+    if (command != LINK_WIRELESS_DATA_REQUEST) {
+      debug("NO WAIT: " + std::to_string(command));
+      while (true)
+        ;
+      linkSPI->activate(LinkSPI::Mode::MASTER_2MBPS);
+      return false;
+    }
+
+    linkSPI->setMasterMode2();
+    linkSPI->set2MbpsSpeed2();
+
+    return true;
+  }
+
   bool receiveData(std::vector<u32>& data) {
+    if (!sendCommand(0x11).success)  // TODO: SIGNAL LEVEL
+      return false;
+
     auto result = sendCommand(LINK_WIRELESS_COMMAND_RECEIVE_DATA);
     data = result.responses;
     return result.success;