diff --git a/hw/sensor/Kconfig b/hw/sensor/Kconfig
index bc6331b4ab..554ccbc5f6 100644
--- a/hw/sensor/Kconfig
+++ b/hw/sensor/Kconfig
@@ -43,3 +43,8 @@ config ISL_PMBUS_VR
 config MAX31785
     bool
     depends on PMBUS
+
+config SI705X
+    bool
+    depends on I2C
+    default y if I2C_DEVICES
diff --git a/hw/sensor/meson.build b/hw/sensor/meson.build
index 420fdc3359..fba9ccd255 100644
--- a/hw/sensor/meson.build
+++ b/hw/sensor/meson.build
@@ -8,3 +8,4 @@ system_ss.add(when: 'CONFIG_MAX34451', if_true: files('max34451.c'))
 system_ss.add(when: 'CONFIG_LSM303DLHC_MAG', if_true: files('lsm303dlhc_mag.c'))
 system_ss.add(when: 'CONFIG_ISL_PMBUS_VR', if_true: files('isl_pmbus_vr.c'))
 system_ss.add(when: 'CONFIG_MAX31785', if_true: files('max31785.c'))
+system_ss.add(when: 'CONFIG_SI705X', if_true: files('tmp_si705x.c'))
diff --git a/hw/sensor/tmp_si705x.c b/hw/sensor/tmp_si705x.c
new file mode 100644
index 0000000000..3b729974f0
--- /dev/null
+++ b/hw/sensor/tmp_si705x.c
@@ -0,0 +1,359 @@
+/*
+ * SI705X-A20-IM, Board Mount Temperature Sensors.
+ *
+ * https://www.integrated-circuit.com/pdf/502/391/4.pdf
+ *
+ * Copyright (c) 2024 Ilya Chichkov <i.chichkov@yadro.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2 or later, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include "qemu/osdep.h"
+#include "qemu/log.h"
+#include "hw/i2c/i2c.h"
+#include "qapi/error.h"
+#include "hw/register.h"
+#include "qapi/visitor.h"
+#include "migration/vmstate.h"
+#include "trace.h"
+
+#define TYPE_SI705X "si705x"
+#define SI705X(obj) OBJECT_CHECK(Si705xState, (obj), TYPE_SI705X)
+
+#define  SI705X_CMD_MEASURE_HOLD_MASTER    0xe3
+#define  SI705X_CMD_MEASURE                0xf3
+#define  SI705X_CMD_RESET                  0xfe
+#define  SI705X_CMD_WRITE_USER_REG         0xe6
+#define  SI705X_CMD_READ_USER_REG          0xe7
+#define  SI705X_CMD_READ_ID_BYTE1_1        0xFA
+#define  SI705X_CMD_READ_ID_BYTE1_2        0x0F
+#define  SI705X_CMD_READ_ID_BYTE2_1        0xFC
+#define  SI705X_CMD_READ_ID_BYTE2_2        0xC9
+#define  SI705X_CMD_READ_FIRMWARE_REV_1    0x84
+#define  SI705X_CMD_READ_FIRMWARE_REV_2    0xB8
+
+#define SI705X_WRITE_MASK   0x81
+
+#define CRC_POLY            0x31
+#define BYTE7               0x80
+#define CRC_SEED            0
+
+#define  SI705X_UR1         0x00
+REG32(SI705X_UR1, 0x00)
+    FIELD(SI705X_UR1, RES0,  0,  1)
+    FIELD(SI705X_UR1, RSVD,  1,  5)
+    FIELD(SI705X_UR1, VDD,   6,  1)
+    FIELD(SI705X_UR1, RES1,  7,  1)
+
+typedef struct Si705xState {
+    /*< private >*/
+    I2CSlave i2c;
+
+    /*< public >*/
+    uint8_t user_reg;
+    uint8_t read_index;
+    uint8_t write_index;
+    uint8_t prev_command;
+    uint8_t command;
+    uint8_t io_buf[5];
+
+    uint8_t temperature[2];
+    uint8_t measurement_resolution;
+    uint8_t vdd_status;
+
+    uint64_t serial_num;
+    uint8_t fw_rev;
+} Si705xState;
+
+static uint8_t temp_sensor_crc(uint8_t *p_data, uint32_t len)
+{
+    uint8_t crc = CRC_SEED;
+
+    for (uint32_t i = 0U; i < len; i++) {
+        crc ^= p_data[i];
+
+        for (uint8_t j = 0U; j < 8; j++) {
+            if ((crc & BYTE7) != 0U) {
+                crc = (crc << 1U) ^ CRC_POLY;
+            } else {
+                crc <<= 1U;
+            }
+        }
+    }
+
+    return crc;
+}
+
+static void si705x_get_temperature(Object *obj, Visitor *v, const char *name,
+                                   void *opaque, Error **errp)
+{
+    Si705xState *s = SI705X(obj);
+
+    int16_t hv = s->temperature[0] << 8;
+    int64_t value = hv | s->temperature[1];
+
+    visit_type_int(v, name, &value, errp);
+}
+
+static void si705x_set_temperature(Object *obj, Visitor *v, const char *name,
+                                   void *opaque, Error **errp)
+{
+    Si705xState *s = SI705X(obj);
+    int64_t temp;
+
+    if (!visit_type_int(v, name, &temp, errp)) {
+        return;
+    }
+
+    /* Apply measurement resolution to set value */
+    temp &= ~((1 << (1 + s->measurement_resolution)) - 1);
+
+    s->temperature[0] = 0xff & (temp >> 8);
+    s->temperature[1] = 0xff & temp;
+}
+
+static void si705x_get_measure_res(Object *obj, Visitor *v, const char *name,
+                                   void *opaque, Error **errp)
+{
+    Si705xState *s = SI705X(obj);
+    int64_t value = s->measurement_resolution;
+    visit_type_int(v, name, &value, errp);
+}
+
+static void si705x_set_measure_res(Object *obj, Visitor *v, const char *name,
+                                   void *opaque, Error **errp)
+{
+    Si705xState *s = SI705X(obj);
+    int64_t temp;
+
+    if (!visit_type_int(v, name, &temp, errp)) {
+        return;
+    }
+
+    s->measurement_resolution = temp & 0x3;
+    s->user_reg |= ((s->measurement_resolution >> 1) << 7);
+    s->user_reg |= (s->measurement_resolution & 0x1);
+}
+
+static void si705x_get_vdds(Object *obj, Visitor *v, const char *name,
+                                   void *opaque, Error **errp)
+{
+    Si705xState *s = SI705X(obj);
+    int64_t value = s->vdd_status;
+    visit_type_int(v, name, &value, errp);
+}
+
+static void si705x_set_vdds(Object *obj, Visitor *v, const char *name,
+                                   void *opaque, Error **errp)
+{
+    Si705xState *s = SI705X(obj);
+    int64_t temp;
+
+    if (!visit_type_int(v, name, &temp, errp)) {
+        return;
+    }
+
+    s->vdd_status = temp & 0x1;
+    s->user_reg |= s->vdd_status << 6;
+}
+
+static void si705x_reset(I2CSlave *i2c)
+{
+    trace_si705x_reset();
+    Si705xState *s = SI705X(i2c);
+
+    s->user_reg = 0x3A;
+    s->read_index = 0;
+    s->write_index = 0;
+    s->command = 0;
+    s->measurement_resolution = 0;
+    s->vdd_status = 0;
+    s->serial_num = 0x37000000;
+    s->fw_rev = 0x20;
+
+    memset(s->io_buf, 0, sizeof(s->io_buf));
+    memset(s->temperature, 0, sizeof(s->temperature));
+}
+
+static void si705x_read(Si705xState *s)
+{
+    switch (s->command) {
+    case SI705X_CMD_MEASURE_HOLD_MASTER:
+    case SI705X_CMD_MEASURE:
+        s->io_buf[0] = s->temperature[0];
+        s->io_buf[1] = s->temperature[1];
+        s->io_buf[2] = temp_sensor_crc(s->io_buf, 2);
+        break;
+    case SI705X_CMD_READ_USER_REG:
+        s->io_buf[0] = s->user_reg;
+        break;
+    case SI705X_CMD_READ_ID_BYTE1_2:
+        if (s->prev_command == SI705X_CMD_READ_ID_BYTE1_1) {
+            s->io_buf[0] = (s->serial_num >> 56) & 0xff;
+            s->io_buf[1] = (s->serial_num >> 48) & 0xff;
+            s->io_buf[2] = (s->serial_num >> 40) & 0xff;
+            s->io_buf[3] = (s->serial_num >> 32) & 0xff;
+        }
+        break;
+    case SI705X_CMD_READ_ID_BYTE2_2:
+        if (s->prev_command == SI705X_CMD_READ_ID_BYTE1_1) {
+            s->io_buf[0] = (s->serial_num >> 24) & 0xff;
+            s->io_buf[1] = (s->serial_num >> 16) & 0xff;
+            s->io_buf[2] = (s->serial_num >> 8) & 0xff;
+            s->io_buf[3] = (s->serial_num >> 0) & 0xff;
+        }
+        break;
+    case SI705X_CMD_READ_FIRMWARE_REV_2:
+        if (s->prev_command == SI705X_CMD_READ_FIRMWARE_REV_1) {
+            s->io_buf[0] = s->fw_rev;
+        }
+        break;
+    default:
+        qemu_log_mask(LOG_GUEST_ERROR,
+                    "%s: write to unimplemented register\n", __func__);
+        break;
+    }
+    trace_si705x_read(s->command);
+}
+
+static void si705x_write(Si705xState *s)
+{
+    switch (s->command) {
+    case SI705X_CMD_RESET:
+        si705x_reset(&s->i2c);
+        break;
+    case SI705X_CMD_WRITE_USER_REG:
+        s->user_reg = s->io_buf[0] & SI705X_WRITE_MASK;
+        break;
+    default:
+        qemu_log_mask(LOG_GUEST_ERROR,
+                    "%s:  write to unimplemented register\n", __func__);
+        break;
+    }
+}
+
+static uint8_t si705x_rx(I2CSlave *i2c)
+{
+    Si705xState *s = SI705X(i2c);
+
+    if (s->read_index < sizeof(s->io_buf)) {
+        trace_si705x_rx(s->io_buf[s->read_index]);
+        return s->io_buf[s->read_index++];
+    }
+    trace_si705x_rx(0xff);
+    return 0xff;
+}
+
+static int si705x_tx(I2CSlave *i2c, uint8_t data)
+{
+    Si705xState *s = SI705X(i2c);
+    trace_si705x_write(s->write_index, sizeof(s->io_buf), data);
+
+    if (s->write_index == 0) {
+        s->command = data;
+        switch (s->command) {
+        case SI705X_CMD_READ_ID_BYTE1_1:
+        case SI705X_CMD_READ_ID_BYTE2_1:
+        case SI705X_CMD_READ_FIRMWARE_REV_1:
+            s->prev_command = s->command;
+            s->write_index = 0;
+            break;
+        default:
+            s->write_index++;
+            break;
+        }
+    } else {
+        if (s->write_index <= sizeof(s->io_buf)) {
+            s->io_buf[s->write_index - 1] = data;
+        }
+        s->write_index++;
+        si705x_write(s);
+    }
+
+    return 0;
+}
+
+static int si705x_event(I2CSlave *i2c, enum i2c_event event)
+{
+    Si705xState *s = SI705X(i2c);
+    trace_si705x_event(event);
+
+    switch (event) {
+    case I2C_START_RECV:
+        si705x_read(s);
+        break;
+    case I2C_FINISH:
+        s->read_index = 0;
+        s->write_index = 0;
+    default:
+        break;
+    }
+    return 0;
+}
+
+static const VMStateDescription vmstate_si705x = {
+    .name = "SI705X",
+    .version_id = 0,
+    .minimum_version_id = 0,
+};
+
+static void si705x_realize(DeviceState *dev, Error **errp)
+{
+    I2CSlave *i2c = I2C_SLAVE(dev);
+    Si705xState *s = SI705X(i2c);
+
+    si705x_reset(&s->i2c);
+}
+
+static void si705x_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    I2CSlaveClass *k = I2C_SLAVE_CLASS(klass);
+
+    k->event = si705x_event;
+    k->recv = si705x_rx;
+    k->send = si705x_tx;
+    dc->realize = si705x_realize;
+    dc->vmsd = &vmstate_si705x;
+
+    trace_si705x_init();
+}
+
+static void si705x_initfn(Object *obj)
+{
+    object_property_add(obj, "temperature", "int",
+                        si705x_get_temperature,
+                        si705x_set_temperature, NULL, NULL);
+    object_property_add(obj, "vdds", "int",
+                        si705x_get_vdds,
+                        si705x_set_vdds, NULL, NULL);
+    object_property_add(obj, "resolution", "int",
+                        si705x_get_measure_res,
+                        si705x_set_measure_res, NULL, NULL);
+}
+
+static const TypeInfo si705x_info = {
+    .name          = TYPE_SI705X,
+    .parent        = TYPE_I2C_SLAVE,
+    .instance_size = sizeof(Si705xState),
+    .instance_init = si705x_initfn,
+    .class_init    = si705x_class_init,
+};
+
+static void si705x_register_types(void)
+{
+    type_register_static(&si705x_info);
+}
+
+type_init(si705x_register_types)
diff --git a/hw/sensor/trace-events b/hw/sensor/trace-events
new file mode 100644
index 0000000000..42e19da98e
--- /dev/null
+++ b/hw/sensor/trace-events
@@ -0,0 +1,9 @@
+# See docs/devel/tracing.rst for syntax documentation.
+
+# tmp_si705x.c
+si705x_write(uint8_t index, uint8_t buf_len, uint8_t data) "index: [%d/%d], data: 0x%x"
+si705x_read(uint8_t cmd) "Command: 0x%x"
+si705x_rx(uint8_t data) "Read RX: 0x%x"
+si705x_event(uint8_t event) "Event: 0x%x"
+si705x_init(void)
+si705x_reset(void)
diff --git a/hw/sensor/trace.h b/hw/sensor/trace.h
new file mode 100644
index 0000000000..e4721560b0
--- /dev/null
+++ b/hw/sensor/trace.h
@@ -0,0 +1 @@
+#include "trace/trace-hw_sensor.h"
diff --git a/meson.build b/meson.build
index d0329966f1..385c903253 100644
--- a/meson.build
+++ b/meson.build
@@ -3330,6 +3330,7 @@ if have_system
     'hw/watchdog',
     'hw/xen',
     'hw/gpio',
+    'hw/sensor',
     'migration',
     'net',
     'system',
