diff --git a/examples/Makefile.am b/examples/Makefile.am
index 9d0d4e5..d32c537 100644
--- a/examples/Makefile.am
+++ b/examples/Makefile.am
@@ -17,7 +17,8 @@ bin_PROGRAMS = \
 	veo250 \
 	vtpro \
 	nemo \
-	puck
+	puck \
+	ostc
 
 if IRDA
 bin_PROGRAMS += smart
@@ -55,6 +56,8 @@ nemo_SOURCES = mares_nemo_test.c
 
 puck_SOURCES = mares_puck_test.c
 
+ostc_SOURCES = hw_ostc_test.c
+
 if IRDA
 smart_SOURCES = uwatec_smart_test.c
 endif
diff --git a/examples/hw_ostc_test.c b/examples/hw_ostc_test.c
new file mode 100644
index 0000000..84519ac
--- /dev/null
+++ b/examples/hw_ostc_test.c
@@ -0,0 +1,121 @@
+/*
+ * libdivecomputer
+ *
+ * Copyright (C) 2009 Jef Driesen
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#include <stdio.h>	// fopen, fwrite, fclose
+
+#include "hw_ostc.h"
+#include "utils.h"
+
+device_status_t
+test_dump_memory (const char* name, const char* filename)
+{
+	device_t *device = NULL;
+
+	message ("hw_ostc_device_open\n");
+	device_status_t rc = hw_ostc_device_open (&device, name);
+	if (rc != DEVICE_STATUS_SUCCESS) {
+		WARNING ("Error opening serial port.");
+		return rc;
+	}
+
+	dc_buffer_t *buffer = dc_buffer_new (0);
+
+	message ("device_dump\n");
+	rc = device_dump (device, buffer);
+	if (rc != DEVICE_STATUS_SUCCESS) {
+		WARNING ("Cannot read memory.");
+		dc_buffer_free (buffer);
+		device_close (device);
+		return rc;
+	}
+
+	message ("Dumping data\n");
+	FILE* fp = fopen (filename, "wb");
+	if (fp != NULL) {
+		fwrite (dc_buffer_get_data (buffer), sizeof (unsigned char), dc_buffer_get_size (buffer), fp);
+		fclose (fp);
+	}
+
+	dc_buffer_free (buffer);
+
+	message ("device_close\n");
+	rc = device_close (device);
+	if (rc != DEVICE_STATUS_SUCCESS) {
+		WARNING ("Cannot close device.");
+		return rc;
+	}
+
+	return DEVICE_STATUS_SUCCESS;
+}
+
+
+const char*
+errmsg (device_status_t rc)
+{
+	switch (rc) {
+	case DEVICE_STATUS_SUCCESS:
+		return "Success";
+	case DEVICE_STATUS_UNSUPPORTED:
+		return "Unsupported operation";
+	case DEVICE_STATUS_TYPE_MISMATCH:
+		return "Device type mismatch";
+	case DEVICE_STATUS_ERROR:
+		return "Generic error";
+	case DEVICE_STATUS_IO:
+		return "Input/output error";
+	case DEVICE_STATUS_MEMORY:
+		return "Memory error";
+	case DEVICE_STATUS_PROTOCOL:
+		return "Protocol error";
+	case DEVICE_STATUS_TIMEOUT:
+		return "Timeout";
+	default:
+		return "Unknown error";
+	}
+}
+
+
+int main(int argc, char *argv[])
+{
+	message_set_logfile ("OSTC.LOG");
+
+#ifdef _WIN32
+	const char* name = "COM1";
+#else
+	const char* name = "/dev/ttyS0";
+#endif
+
+	if (argc > 1) {
+		name = argv[1];
+	}
+
+	message ("DEVICE=%s\n", name);
+
+	device_status_t a = test_dump_memory (name, "OSTC.DMP");
+
+	message ("SUMMARY\n");
+	message ("-------\n");
+	message ("test_dump_memory:          %s\n", errmsg (a));
+
+	message_set_logfile (NULL);
+
+	return 0;
+}
diff --git a/examples/universal.c b/examples/universal.c
index 55d8003..6d442bc 100644
--- a/examples/universal.c
+++ b/examples/universal.c
@@ -32,6 +32,7 @@
 #include <uwatec.h>
 #include <oceanic.h>
 #include <mares.h>
+#include <hw.h>
 #include <utils.h>
 
 typedef struct backend_table_t {
@@ -55,7 +56,8 @@ static const backend_table_t g_backends[] = {
 	{"veo250",		DEVICE_TYPE_OCEANIC_VEO250},
 	{"atom2",		DEVICE_TYPE_OCEANIC_ATOM2},
 	{"nemo",		DEVICE_TYPE_MARES_NEMO},
-	{"puck",		DEVICE_TYPE_MARES_PUCK}
+	{"puck",		DEVICE_TYPE_MARES_PUCK},
+	{"ostc",		DEVICE_TYPE_HW_OSTC}
 };
 
 static device_type_t
@@ -232,6 +234,9 @@ dowork (device_type_t backend, const char *devname, const char *filename)
 	case DEVICE_TYPE_MARES_PUCK:
 		rc = mares_puck_device_open (&device, devname);
 		break;
+	case DEVICE_TYPE_HW_OSTC:
+		rc = hw_ostc_device_open (&device, devname);
+		break;
 	default:
 		rc = DEVICE_STATUS_ERROR;
 		break;
diff --git a/msvc/libdivecomputer.vcproj b/msvc/libdivecomputer.vcproj
index da5e7be..75fb864 100644
--- a/msvc/libdivecomputer.vcproj
+++ b/msvc/libdivecomputer.vcproj
@@ -192,6 +192,10 @@
 				RelativePath="..\src\device.c"
 				>
 			</File>
+			<File
+				RelativePath="..\src\hw_ostc.c"
+				>
+			</File>
 			<File
 				RelativePath="..\src\irda.c"
 				>
@@ -362,6 +366,14 @@
 				RelativePath="..\src\device.h"
 				>
 			</File>
+			<File
+				RelativePath="..\src\hw.h"
+				>
+			</File>
+			<File
+				RelativePath="..\src\hw_ostc.h"
+				>
+			</File>
 			<File
 				RelativePath="..\src\irda.h"
 				>
diff --git a/src/Makefile.am b/src/Makefile.am
index 42c918b..9c56206 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -29,7 +29,9 @@ libdivecomputer_HEADERS = 	\
 	oceanic_vtpro.h \
 	mares.h \
 	mares_nemo.h \
-	mares_puck.h
+	mares_puck.h \
+	hw.h \
+	hw_ostc.h
 
 #
 # Source files.
@@ -68,6 +70,8 @@ libdivecomputer_la_SOURCES = \
 	mares_common.h mares_common.c \
 	mares_nemo.h mares_nemo.c mares_nemo_parser.c \
 	mares_puck.h mares_puck.c \
+	hw.h \
+	hw_ostc.h hw_ostc.c \
 	ringbuffer.h ringbuffer.c \
 	checksum.h checksum.c \
 	array.h array.c \
diff --git a/src/device.h b/src/device.h
index 6ffdd55..3707e46 100644
--- a/src/device.h
+++ b/src/device.h
@@ -45,7 +45,8 @@ typedef enum device_type_t {
 	DEVICE_TYPE_OCEANIC_VEO250,
 	DEVICE_TYPE_OCEANIC_VTPRO,
 	DEVICE_TYPE_MARES_NEMO,
-	DEVICE_TYPE_MARES_PUCK
+	DEVICE_TYPE_MARES_PUCK,
+	DEVICE_TYPE_HW_OSTC
 } device_type_t;
 
 typedef enum device_status_t {
diff --git a/src/hw.h b/src/hw.h
new file mode 100644
index 0000000..b7d6384
--- /dev/null
+++ b/src/hw.h
@@ -0,0 +1,27 @@
+/*
+ * libdivecomputer
+ *
+ * Copyright (C) 2009 Jef Driesen
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#ifndef HW_H
+#define HW_H
+
+#include "hw_ostc.h"
+
+#endif /* HW_H */
diff --git a/src/hw_ostc.c b/src/hw_ostc.c
new file mode 100644
index 0000000..2717907
--- /dev/null
+++ b/src/hw_ostc.c
@@ -0,0 +1,180 @@
+/*
+ * libdivecomputer
+ *
+ * Copyright (C) 2009 Jef Driesen
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#include <string.h> // memcmp, memcpy
+#include <stdlib.h> // malloc, free
+#include <assert.h> // assert
+
+#include "device-private.h"
+#include "hw_ostc.h"
+#include "serial.h"
+#include "checksum.h"
+#include "utils.h"
+#include "array.h"
+
+#define EXITCODE(rc) \
+( \
+	rc == -1 ? DEVICE_STATUS_IO : DEVICE_STATUS_TIMEOUT \
+)
+
+typedef struct hw_ostc_device_t {
+	device_t base;
+	struct serial *port;
+} hw_ostc_device_t;
+
+static device_status_t hw_ostc_device_dump (device_t *abstract, dc_buffer_t *buffer);
+static device_status_t hw_ostc_device_close (device_t *abstract);
+
+static const device_backend_t hw_ostc_device_backend = {
+	DEVICE_TYPE_HW_OSTC,
+	NULL, /* set_fingerprint */
+	NULL, /* version */
+	NULL, /* read */
+	NULL, /* write */
+	hw_ostc_device_dump, /* dump */
+	NULL, /* foreach */
+	hw_ostc_device_close /* close */
+};
+
+
+static int
+device_is_hw_ostc (device_t *abstract)
+{
+	if (abstract == NULL)
+		return 0;
+
+    return abstract->backend == &hw_ostc_device_backend;
+}
+
+
+device_status_t
+hw_ostc_device_open (device_t **out, const char* name)
+{
+	if (out == NULL)
+		return DEVICE_STATUS_ERROR;
+
+	// Allocate memory.
+	hw_ostc_device_t *device = (hw_ostc_device_t *) malloc (sizeof (hw_ostc_device_t));
+	if (device == NULL) {
+		WARNING ("Failed to allocate memory.");
+		return DEVICE_STATUS_MEMORY;
+	}
+
+	// Initialize the base class.
+	device_init (&device->base, &hw_ostc_device_backend);
+
+	// Set the default values.
+	device->port = NULL;
+
+	// Open the device.
+	int rc = serial_open (&device->port, name);
+	if (rc == -1) {
+		WARNING ("Failed to open the serial port.");
+		free (device);
+		return DEVICE_STATUS_IO;
+	}
+
+	// Set the serial communication protocol (115200 8N1).
+	rc = serial_configure (device->port, 115200, 8, SERIAL_PARITY_NONE, 1, SERIAL_FLOWCONTROL_NONE);
+	if (rc == -1) {
+		WARNING ("Failed to set the terminal attributes.");
+		serial_close (device->port);
+		free (device);
+		return DEVICE_STATUS_IO;
+	}
+
+	// Set the timeout for receiving data (INFINITE).
+	if (serial_set_timeout (device->port, -1) == -1) {
+		WARNING ("Failed to set the timeout.");
+		serial_close (device->port);
+		free (device);
+		return DEVICE_STATUS_IO;
+	}
+
+	*out = (device_t*) device;
+
+	return DEVICE_STATUS_SUCCESS;
+}
+
+
+static device_status_t
+hw_ostc_device_close (device_t *abstract)
+{
+	hw_ostc_device_t *device = (hw_ostc_device_t*) abstract;
+
+	if (! device_is_hw_ostc (abstract))
+		return DEVICE_STATUS_TYPE_MISMATCH;
+
+	// Close the device.
+	if (serial_close (device->port) == -1) {
+		free (device);
+		return DEVICE_STATUS_IO;
+	}
+
+	// Free memory.
+	free (device);
+
+	return DEVICE_STATUS_SUCCESS;
+}
+
+
+static device_status_t
+hw_ostc_device_dump (device_t *abstract, dc_buffer_t *buffer)
+{
+	hw_ostc_device_t *device = (hw_ostc_device_t*) abstract;
+
+	if (! device_is_hw_ostc (abstract))
+		return DEVICE_STATUS_TYPE_MISMATCH;
+
+	// Erase the current contents of the buffer and
+	// allocate the required amount of memory.
+	if (!dc_buffer_clear (buffer) || !dc_buffer_resize (buffer, HW_OSTC_MEMORY_SIZE)) {
+		WARNING ("Insufficient buffer space available.");
+		return DEVICE_STATUS_MEMORY;
+	}
+
+	// Enable progress notifications.
+	device_progress_t progress = DEVICE_PROGRESS_INITIALIZER;
+	progress.maximum = HW_OSTC_MEMORY_SIZE;
+	device_event_emit (abstract, DEVICE_EVENT_PROGRESS, &progress);
+
+	// Send the command.
+	unsigned char command[1] = {'a'};
+	int rc = serial_write (device->port, command, sizeof (command));
+	if (rc != sizeof (command)) {
+		WARNING ("Failed to send the command.");
+		return EXITCODE (rc);
+	}
+
+	// Receive the answer.
+	unsigned char *data = dc_buffer_get_data (buffer);
+	rc = serial_read (device->port, data, HW_OSTC_MEMORY_SIZE);
+	if (rc != HW_OSTC_MEMORY_SIZE) {
+		WARNING ("Failed to receive the answer.");
+		return EXITCODE (rc);
+	}
+
+	// Update and emit a progress event.
+	progress.current += HW_OSTC_MEMORY_SIZE;
+	device_event_emit (abstract, DEVICE_EVENT_PROGRESS, &progress);
+
+	return DEVICE_STATUS_SUCCESS;
+}
diff --git a/src/hw_ostc.h b/src/hw_ostc.h
new file mode 100644
index 0000000..adf853c
--- /dev/null
+++ b/src/hw_ostc.h
@@ -0,0 +1,39 @@
+/*
+ * libdivecomputer
+ *
+ * Copyright (C) 2009 Jef Driesen
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#ifndef HW_OSTC_H
+#define HW_OSTC_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+#include "device.h"
+
+#define HW_OSTC_MEMORY_SIZE 33034
+
+device_status_t
+hw_ostc_device_open (device_t **device, const char* name);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+#endif /* HW_OSTC_H */
diff --git a/src/libdivecomputer.symbols b/src/libdivecomputer.symbols
index ae853bb..f480291 100644
--- a/src/libdivecomputer.symbols
+++ b/src/libdivecomputer.symbols
@@ -92,6 +92,7 @@ uwatec_aladin_extract_dives
 uwatec_memomouse_device_open
 uwatec_memomouse_device_set_timestamp
 uwatec_memomouse_extract_dives
+hw_ostc_device_open
 #endif
 
 #ifdef IRDA