diff --git a/configure.ac b/configure.ac
index 1d146283..9601dbe3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -293,7 +293,7 @@ SR_DRIVER([Teleinfo], [teleinfo], [serial_comm])
 SR_DRIVER([Testo], [testo], [libusb])
 SR_DRIVER([Tondaj SL-814], [tondaj-sl-814], [serial_comm])
 SR_DRIVER([UNI-T DMM], [uni-t-dmm], [libusb])
-SR_DRIVER([UNI-T UT32x], [uni-t-ut32x], [libusb])
+SR_DRIVER([UNI-T UT32x], [uni-t-ut32x], [serial_comm])
 SR_DRIVER([Victor DMM], [victor-dmm], [libusb])
 SR_DRIVER([Yokogawa DL/DLM], [yokogawa-dlm])
 SR_DRIVER([ZEROPLUS Logic Cube], [zeroplus-logic-cube], [libusb])
diff --git a/src/hardware/uni-t-ut32x/api.c b/src/hardware/uni-t-ut32x/api.c
index 47211fa4..199fe473 100644
--- a/src/hardware/uni-t-ut32x/api.c
+++ b/src/hardware/uni-t-ut32x/api.c
@@ -23,6 +23,7 @@
 
 static const uint32_t scanopts[] = {
 	SR_CONF_CONN,
+	SR_CONF_SERIALCOMM,
 };
 
 static const uint32_t drvopts[] = {
@@ -55,110 +56,63 @@ static const char *data_sources[] = {
 
 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 {
-	struct drv_context *drvc;
-	struct dev_context *devc;
-	struct sr_dev_inst *sdi;
+	const char *conn, *serialcomm;
 	struct sr_config *src;
-	GSList *usb_devices, *devices, *l;
-	unsigned int i;
-	const char *conn;
+	GSList *l, *devices;
+	struct sr_serial_dev_inst *serial;
+	int rc;
+	struct sr_dev_inst *sdi;
+	struct dev_context *devc;
+	size_t i;
 
-	drvc = di->context;
-
-	conn = "1a86.e008";
+	conn = "hid/ch9325";
+	serialcomm = "2400/8n1";
 	for (l = options; l; l = l->next) {
 		src = l->data;
 		switch (src->key) {
 		case SR_CONF_CONN:
 			conn = g_variant_get_string(src->data, NULL);
 			break;
+		case SR_CONF_SERIALCOMM:
+			serialcomm = g_variant_get_string(src->data, NULL);
+			break;
 		}
 	}
-	if (!conn)
-		return NULL;
 
 	devices = NULL;
-	if ((usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn))) {
-		/* We have a list of sr_usb_dev_inst matching the connection
-		 * string. Wrap them in sr_dev_inst and we're done. */
-		for (l = usb_devices; l; l = l->next) {
-			sdi = g_malloc0(sizeof(struct sr_dev_inst));
-			sdi->status = SR_ST_INACTIVE;
-			sdi->vendor = g_strdup("UNI-T");
-			sdi->model = g_strdup("UT32x");
-			sdi->inst_type = SR_INST_USB;
-			sdi->conn = l->data;
-			for (i = 0; i < ARRAY_SIZE(channel_names); i++)
-				sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, TRUE,
-						channel_names[i]);
-			devc = g_malloc0(sizeof(struct dev_context));
-			sdi->priv = devc;
-			sr_sw_limits_init(&devc->limits);
-			devc->data_source = DEFAULT_DATA_SOURCE;
-			devices = g_slist_append(devices, sdi);
-		}
-		g_slist_free(usb_devices);
-	} else
-		g_slist_free_full(usb_devices, g_free);
+	serial = sr_serial_dev_inst_new(conn, serialcomm);
+	rc = serial_open(serial, SERIAL_RDWR);
+	serial_flush(serial);
+	/* Cannot query/identify the device. Successful open shall suffice. */
+	serial_close(serial);
+	if (rc != SR_OK) {
+		sr_serial_dev_inst_free(serial);
+		return devices;
+	}
+
+	sdi = g_malloc0(sizeof(*sdi));
+	sdi->status = SR_ST_INACTIVE;
+	sdi->vendor = g_strdup("UNI-T");
+	sdi->model = g_strdup("UT32x");
+	sdi->inst_type = SR_INST_SERIAL;
+	sdi->conn = serial;
+	devc = g_malloc0(sizeof(*devc));
+	sdi->priv = devc;
+	sr_sw_limits_init(&devc->limits);
+	devc->data_source = DEFAULT_DATA_SOURCE;
+	for (i = 0; i < ARRAY_SIZE(channel_names); i++) {
+		sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, TRUE,
+				channel_names[i]);
+	}
+	devices = g_slist_append(devices, sdi);
+
+	serial_close(serial);
+	if (!devices)
+		sr_serial_dev_inst_free(serial);
 
 	return std_scan_complete(di, devices);
 }
 
-static int dev_open(struct sr_dev_inst *sdi)
-{
-	struct sr_dev_driver *di = sdi->driver;
-	struct drv_context *drvc = di->context;
-	struct sr_usb_dev_inst *usb;
-	int ret;
-
-	usb = sdi->conn;
-
-	if (sr_usb_open(drvc->sr_ctx->libusb_ctx, usb) != SR_OK)
-		return SR_ERR;
-
-/*
- * The libusb 1.0.9 Darwin backend is broken: it can report a kernel
- * driver being active, but detaching it always returns an error.
- */
-#if !defined(__APPLE__)
-	if (libusb_kernel_driver_active(usb->devhdl, USB_INTERFACE) == 1) {
-		if ((ret = libusb_detach_kernel_driver(usb->devhdl, USB_INTERFACE)) < 0) {
-			sr_err("failed to detach kernel driver: %s",
-					libusb_error_name(ret));
-			return SR_ERR;
-		}
-	}
-#endif
-
-	if ((ret = libusb_set_configuration(usb->devhdl, USB_CONFIGURATION))) {
-		sr_err("Failed to set configuration: %s.", libusb_error_name(ret));
-		return SR_ERR;
-	}
-
-	if ((ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE))) {
-		sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
-		return SR_ERR;
-	}
-
-	return SR_OK;
-}
-
-static int dev_close(struct sr_dev_inst *sdi)
-{
-	struct sr_usb_dev_inst *usb;
-
-	usb = sdi->conn;
-
-	if (!usb->devhdl)
-		return SR_ERR_BUG;
-
-	libusb_release_interface(usb->devhdl, USB_INTERFACE);
-	libusb_close(usb->devhdl);
-	usb->devhdl = NULL;
-
-	return SR_OK;
-}
-
 static int config_get(uint32_t key, GVariant **data,
 	const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 {
@@ -226,66 +180,32 @@ static int config_list(uint32_t key, GVariant **data,
 
 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 {
-	struct sr_dev_driver *di = sdi->driver;
-	struct drv_context *drvc;
 	struct dev_context *devc;
-	struct sr_usb_dev_inst *usb;
-	int len, ret;
-	unsigned char cmd[2];
+	struct sr_serial_dev_inst *serial;
+	uint8_t cmd;
 
-	drvc = di->context;
 	devc = sdi->priv;
-	usb = sdi->conn;
+	serial = sdi->conn;
 
 	sr_sw_limits_acquisition_start(&devc->limits);
 	devc->packet_len = 0;
-
-	/* Configure serial port parameters on USB-UART interface
-	 * chip inside the device (just baudrate 2400 actually). */
-	cmd[0] = 0x09;
-	cmd[1] = 0x60;
-	ret = libusb_control_transfer(usb->devhdl, 0x21, 0x09, 0x0300, 0x00,
-			cmd, 2, 5);
-	if (ret != 2) {
-		sr_dbg("Failed to configure CH9325: %s", libusb_error_name(ret));
-		return SR_ERR;
-	}
-
 	std_session_send_df_header(sdi);
 
-	if (!(devc->xfer = libusb_alloc_transfer(0)))
-		return SR_ERR;
-
-	/* Length of payload to follow. */
-	cmd[0] = 0x01;
 	if (devc->data_source == DATA_SOURCE_LIVE)
-		cmd[1] = CMD_GET_LIVE;
+		cmd = CMD_GET_LIVE;
 	else
-		cmd[1] = CMD_GET_STORED;
+		cmd = CMD_GET_STORED;
+	serial_write_blocking(serial, &cmd, sizeof(cmd), 0);
 
-	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, cmd, 2, &len, 5);
-	if (ret != 0 || len != 2) {
-		sr_dbg("Failed to start acquisition: %s", libusb_error_name(ret));
-		libusb_free_transfer(devc->xfer);
-		return SR_ERR;
-	}
-
-	libusb_fill_bulk_transfer(devc->xfer, usb->devhdl, EP_IN, devc->buf,
-			8, uni_t_ut32x_receive_transfer, (void *)sdi, 15);
-	if (libusb_submit_transfer(devc->xfer) != 0) {
-		libusb_free_transfer(devc->xfer);
-		return SR_ERR;
-	}
-
-	usb_source_add(sdi->session, drvc->sr_ctx, 10,
-			uni_t_ut32x_handle_events, (void *)sdi);
+	serial_source_add(sdi->session, serial, G_IO_IN, 10,
+			ut32x_handle_events, (void *)sdi);
 
 	return SR_OK;
 }
 
 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 {
-	/* Signal USB transfer handler to clean up and stop. */
+	/* Have the reception routine stop the acquisition. */
 	sdi->status = SR_ST_STOPPING;
 
 	return SR_OK;
@@ -303,8 +223,8 @@ static struct sr_dev_driver uni_t_ut32x_driver_info = {
 	.config_get = config_get,
 	.config_set = config_set,
 	.config_list = config_list,
-	.dev_open = dev_open,
-	.dev_close = dev_close,
+	.dev_open = std_serial_dev_open,
+	.dev_close = std_serial_dev_close,
 	.dev_acquisition_start = dev_acquisition_start,
 	.dev_acquisition_stop = dev_acquisition_stop,
 	.context = NULL,
diff --git a/src/hardware/uni-t-ut32x/protocol.c b/src/hardware/uni-t-ut32x/protocol.c
index 4da24662..bd5a5cb0 100644
--- a/src/hardware/uni-t-ut32x/protocol.c
+++ b/src/hardware/uni-t-ut32x/protocol.c
@@ -212,88 +212,65 @@ static int process_buffer(struct sr_dev_inst *sdi)
 	return 0;
 }
 
-SR_PRIV void LIBUSB_CALL uni_t_ut32x_receive_transfer(struct libusb_transfer *transfer)
+/* Gets invoked when RX data is available. */
+static int ut32x_receive_data(struct sr_dev_inst *sdi)
 {
 	struct dev_context *devc;
-	struct sr_dev_inst *sdi;
-	int hid_payload_len, ret;
+	struct sr_serial_dev_inst *serial;
+	size_t len;
 
-	sdi = transfer->user_data;
 	devc = sdi->priv;
-	if (transfer->actual_length == 8) {
-		/* CH9325 encodes length in low nibble of first byte, with
-		 * bytes 1-7 being the (padded) payload. */
-		hid_payload_len = transfer->buffer[0] & 0x0f;
-		memcpy(devc->packet + devc->packet_len, transfer->buffer + 1,
-				hid_payload_len);
-		devc->packet_len += hid_payload_len;
-		/*
-		 * Discard receive data when the buffer is exhausted. This shall
-		 * allow to (re-)synchronize to the data stream when we find it
-		 * in an arbitrary state. Check the receive buffer for packets.
-		 */
-		if (devc->packet_len == sizeof(devc->packet)) {
-			process_packet(sdi, &devc->packet[0], devc->packet_len);
-			devc->packet_len = 0;
-		}
-		process_buffer(sdi);
+	serial = sdi->conn;
+
+	/*
+	 * Discard receive data when the buffer is exhausted. This shall
+	 * allow to (re-)synchronize to the data stream when we find it
+	 * in an arbitrary state. Drain more data from the serial port,
+	 * and check the receive buffer for packets.
+	 */
+	if (devc->packet_len == sizeof(devc->packet)) {
+		process_packet(sdi, &devc->packet[0], devc->packet_len);
+		devc->packet_len = 0;
 	}
+	len = sizeof(devc->packet) - devc->packet_len;
+	len = serial_read_nonblocking(serial,
+			&devc->packet[devc->packet_len], len);
+	if (!len)
+		return 0;
 
-	/* Get the next transfer (unless we're shutting down). */
-	if (sdi->status != SR_ST_STOPPING) {
-		if ((ret = libusb_submit_transfer(devc->xfer)) != 0) {
-			sr_dbg("Failed to resubmit transfer: %s", libusb_error_name(ret));
-			sdi->status = SR_ST_STOPPING;
-			libusb_free_transfer(devc->xfer);
-		}
-	} else
-		libusb_free_transfer(devc->xfer);
+	devc->packet_len += len;
+	process_buffer(sdi);
 
+	return 0;
 }
 
-SR_PRIV int uni_t_ut32x_handle_events(int fd, int revents, void *cb_data)
+/* Gets periodically invoked by the glib main loop. */
+SR_PRIV int ut32x_handle_events(int fd, int revents, void *cb_data)
 {
-	struct drv_context *drvc;
-	struct dev_context *devc;
-	struct sr_dev_driver *di;
 	struct sr_dev_inst *sdi;
-	struct sr_usb_dev_inst *usb;
-	struct timeval tv;
-	int len, ret;
-	unsigned char cmd[2];
+	struct sr_serial_dev_inst *serial;
+	uint8_t cmd;
 
 	(void)fd;
-	(void)revents;
 
-	if (!(sdi = cb_data))
+	sdi = cb_data;
+	if (!sdi)
+		return TRUE;
+	serial = sdi->conn;
+	if (!serial)
 		return TRUE;
 
-	di = sdi->driver;
-	drvc = di->context;
-
-	if (!(devc = sdi->priv))
-		return TRUE;
-
-	memset(&tv, 0, sizeof(struct timeval));
-	libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv,
-			NULL);
+	if (revents & G_IO_IN)
+		ut32x_receive_data(sdi);
 
 	if (sdi->status == SR_ST_STOPPING) {
-		usb_source_remove(sdi->session, drvc->sr_ctx);
+		serial_source_remove(sdi->session, serial);
 		std_session_send_df_end(sdi);
-
-		/* Tell the device to stop sending USB packets. */
-		usb = sdi->conn;
-		cmd[0] = 0x01;
-		cmd[1] = CMD_STOP;
-		ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, cmd, 2, &len, 5);
-		if (ret != 0 || len != 2) {
-			/* Warning only, doesn't matter. */
-			sr_dbg("Failed to send stop command: %s", libusb_error_name(ret));
-		}
-
 		sdi->status = SR_ST_ACTIVE;
-		return TRUE;
+
+		/* Tell the device to stop sending data. */
+		cmd = CMD_STOP;
+		serial_write_blocking(serial, &cmd, sizeof(cmd), 0);
 	}
 
 	return TRUE;
diff --git a/src/hardware/uni-t-ut32x/protocol.h b/src/hardware/uni-t-ut32x/protocol.h
index eb10a65b..83a9da19 100644
--- a/src/hardware/uni-t-ut32x/protocol.h
+++ b/src/hardware/uni-t-ut32x/protocol.h
@@ -28,12 +28,6 @@
 #define LOG_PREFIX "uni-t-ut32x"
 
 #define DEFAULT_DATA_SOURCE DATA_SOURCE_LIVE
-#define USB_CONN "1a86.e008"
-#define USB_INTERFACE 0
-#define USB_CONFIGURATION 1
-
-#define EP_IN (0x80 | 2)
-#define EP_OUT 2
 
 #define PACKET_SIZE	19
 
@@ -51,14 +45,10 @@ enum ut32x_cmd_code {
 struct dev_context {
 	struct sr_sw_limits limits;
 	enum ut32x_data_source data_source;
-	unsigned char buf[8];
-	struct libusb_transfer *xfer;
-
-	unsigned char packet[32];
+	uint8_t packet[PACKET_SIZE];
 	size_t packet_len;
 };
 
-SR_PRIV int uni_t_ut32x_handle_events(int fd, int revents, void *cb_data);
-SR_PRIV void LIBUSB_CALL uni_t_ut32x_receive_transfer(struct libusb_transfer *transfer);
+SR_PRIV int ut32x_handle_events(int fd, int revents, void *cb_data);
 
 #endif