RX888 MKII patch

diff --git a/src/librx888.c b/src/librx888.c
index 430739d..de7944d 100644
--- a/src/librx888.c
+++ b/src/librx888.c
@@ -47,7 +47,13 @@ enum rx888_command {
     STARTADC = 0xB2,
     STOPFX3 = 0xAB,
     R820T2STDBY = 0xB8,
-    GPIOFX3 = 0xAD
+    GPIOFX3 = 0xAD,
+    SETARGFX3 = 0xB6
+};
+
+enum rx888_argument {
+    AD8340_VGA = 11,
+    DAT31_ATT = 10,
 };

 // Bitmasks for GPIO pins
@@ -125,6 +131,24 @@ static int rx888_send_command(struct libusb_device_handle *dev_handle,
   return 0;
 }

+static int rx888_send_argument(struct libusb_device_handle *dev_handle,
+                                 enum rx888_argument cmd,uint32_t data)
+{
+  /* Send the control message. */
+  uint8_t zero = 0;
+  int ret = libusb_control_transfer(
+      dev_handle, LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_OUT, SETARGFX3, data, cmd,
+      (unsigned char *)&zero, sizeof(zero), CTRL_TIMEOUT);
+
+  if (ret < 0) {
+    fprintf(stderr, "Could not send argument: 0x%X with data: %d. Error : %s.\n",
+            cmd, data, libusb_error_name(ret));
+    return -1;
+  }
+
+  return 0;
+}
+
 int rx888_set_hf_attenuation(rx888_dev_t *dev, double rf_gain)
 {
     if (!dev)
@@ -436,10 +460,14 @@ int rx888_open(rx888_dev_t **out_dev, uint32_t index)

     dev->dev_lost = false;

-    dev->gpio_state = BIAS_HF;
+    // dev->gpio_state = BIAS_HF;
+    dev->gpio_state = 0;
     *out_dev = dev;
     rx888_send_command(dev->dev_handle, R820T2STDBY, 0);
     rx888_send_command(dev->dev_handle, STOPFX3, 0);
+    // Change the number below to change gain, 0 - 127 for -11 - 17dB voltage gain; 128 - 255 for 6 - 34 dB gain.
+    rx888_send_argument(dev->dev_handle, AD8340_VGA, 157);
+    rx888_send_argument(dev->dev_handle, DAT31_ATT, 0);
     rx888_send_command(dev->dev_handle, STARTADC, dev->sample_rate);
     rx888_send_command(dev->dev_handle, STARTFX3, 0);
     return 0;