diff --git a/ds/Liquid crystal display module 1602A.pdf b/ds/Liquid crystal display module 1602A.pdf
new file mode 100644
index 0000000..7ccb73f
Binary files /dev/null and b/ds/Liquid crystal display module 1602A.pdf differ
diff --git a/ds/Liquid crystal display module 1604A.pdf b/ds/Liquid crystal display module 1604A.pdf
new file mode 100644
index 0000000..ed15bae
Binary files /dev/null and b/ds/Liquid crystal display module 1604A.pdf differ
diff --git a/zh_160x_i2c.c b/zh_160x_i2c.c
index ae4d199..192d5a4 100644
--- a/zh_160x_i2c.c
+++ b/zh_160x_i2c.c
@@ -54,10 +54,11 @@ esp_err_t zh_160x_lcd_clear(zh_pcf8574_handle_t *handle)
 esp_err_t zh_160x_set_cursor(zh_pcf8574_handle_t *handle, uint8_t row, uint8_t col)
 {
     ZH_160X_I2C_LOGI("160X set cursor started.");
-    ZH_160X_I2C_CHECK(row < 2 && col < 16 && handle != NULL, ESP_ERR_INVALID_ARG, "160X set cursor failed. Invalid argument.");
+    ZH_160X_I2C_CHECK(row < ((handle->system == ZH_LCD_16X2) ? 2 : 4) && col < 16 && handle != NULL, ESP_ERR_INVALID_ARG, "160X set cursor failed. Invalid argument.");
     ZH_160X_I2C_CHECK(handle->is_initialized == true, ESP_ERR_INVALID_STATE, "160X set cursor failed. PCF8574 not initialized.");
-    uint8_t address = (row == 0) ? col : (0x40 + col);
-    _zh_160x_send_command(handle, 0x80 | address);
+    _zh_160x_send_command(handle, 0x80 | ((row == 0) ? col : (row == 1) ? (0x40 + col)
+                                                         : (row == 2)   ? (0x10 + col)
+                                                                        : (0x50 + col)));
     ZH_160X_I2C_LOGI("160X set cursor completed successfully.");
     return ESP_OK;
 }
@@ -102,7 +103,7 @@ esp_err_t zh_160x_print_float(zh_pcf8574_handle_t *handle, float num, uint8_t pr
 esp_err_t zh_160x_print_progress_bar(zh_pcf8574_handle_t *handle, uint8_t row, uint8_t progress)
 {
     ZH_160X_I2C_LOGI("160X print progress bar started.");
-    ZH_160X_I2C_CHECK(row < 2 && progress <= 100 && handle != NULL, ESP_ERR_INVALID_ARG, "160X print progress bar failed. Invalid argument.");
+    ZH_160X_I2C_CHECK(row < ((handle->system == ZH_LCD_16X2) ? 2 : 4) && progress <= 100 && handle != NULL, ESP_ERR_INVALID_ARG, "160X print progress bar failed. Invalid argument.");
     ZH_160X_I2C_CHECK(handle->is_initialized == true, ESP_ERR_INVALID_STATE, "160X print progress bar failed. PCF8574 not initialized.");
     uint8_t blocks = (progress * 16) / 100;
     zh_160x_set_cursor(handle, row, 0);
@@ -124,7 +125,7 @@ esp_err_t zh_160x_print_progress_bar(zh_pcf8574_handle_t *handle, uint8_t row, u
 esp_err_t zh_160x_clear_row(zh_pcf8574_handle_t *handle, uint8_t row)
 {
     ZH_160X_I2C_LOGI("160X clear row started.");
-    ZH_160X_I2C_CHECK(row < 2 && handle != NULL, ESP_ERR_INVALID_ARG, "160X clear row failed. Invalid argument.");
+    ZH_160X_I2C_CHECK(row < ((handle->system == ZH_LCD_16X2) ? 2 : 4) && handle != NULL, ESP_ERR_INVALID_ARG, "160X clear row failed. Invalid argument.");
     ZH_160X_I2C_CHECK(handle->is_initialized == true, ESP_ERR_INVALID_STATE, "160X clear row failed. PCF8574 not initialized.");
     zh_160x_set_cursor(handle, row, 0);
     for (uint8_t i = 0; i < 16; ++i)