让别人连接自己的mysql数据库,共享mysql数据库

把mysql共享给他人可以分为两种类型

1.共享所有数据库给他人

首先通过终端连接到mysql

mysql -u root -p

选择要使用的数据库

use mysql;

修改连接所需的host为任意

//格式为update user set host="%" where user='用户名';
update user set host="%" where user='root';

最后记得刷新

flush privileges;

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2.共享部分数据库给他人

创建用户
格式为: create user’用户名’@‘连接的主机’ indentified by ‘密码’;

create user'test1'@'%' identified by '123456';

授权
授予某个数据库的所有表的操作权限给test1用户

grant all on 数据库名.* to 'test1'@'%';
//刷新
flush privileges;

在这里插入图片描述

以下是使用Python控制MAX30102传感器的示例代码: ```python import smbus2 import time # MAX30102 I2C address MAX30102_ADDRESS = 0x57 # MAX30102 register addresses MAX30102_REG_INTERRUPT_STATUS_1 = 0x00 MAX30102_REG_INTERRUPT_STATUS_2 = 0x01 MAX30102_REG_FIFO_WRITE_POINTER = 0x02 MAX30102_REG_FIFO_OVERFLOW_COUNTER = 0x03 MAX30102_REG_FIFO_READ_POINTER = 0x04 MAX30102_REG_FIFO_DATA = 0x05 MAX30102_REG_MODE_CONFIG = 0x06 MAX30102_REG_SPO2_CONFIG = 0x07 MAX30102_REG_LED1_PA = 0x09 MAX30102_REG_LED2_PA = 0x0A MAX30102_REG_MULTI_LED_CTRL1 = 0x11 MAX30102_REG_MULTI_LED_CTRL2 = 0x12 MAX30102_REG_TEMP_INTEGER = 0x1F MAX30102_REG_TEMP_FRACTION = 0x20 MAX30102_REG_REVISION_ID = 0xFE MAX30102_REG_PART_ID = 0xFF # MAX30102 mode configuration settings MAX30102_MODE_HR_ONLY = 0x02 MAX30102_MODE_SPO2_ONLY = 0x03 MAX30102_MODE_MULTI_LED = 0x07 # MAX30102 sample rate configuration settings MAX30102_SAMPLING_RATE_50 = 0x00 MAX30102_SAMPLING_RATE_100 = 0x01 MAX30102_SAMPLING_RATE_200 = 0x02 MAX30102_SAMPLING_RATE_400 = 0x03 MAX30102_SAMPLING_RATE_800 = 0x04 MAX30102_SAMPLING_RATE_1000 = 0x05 MAX30102_SAMPLING_RATE_1600 = 0x06 MAX30102_SAMPLING_RATE_3200 = 0x07 # MAX30102 LED pulse amplitude configuration settings MAX30102_LED_PA_0 = 0x00 MAX30102_LED_PA_1 = 0x01 MAX30102_LED_PA_2 = 0x02 MAX30102_LED_PA_3 = 0x03 MAX30102_LED_PA_4 = 0x04 MAX30102_LED_PA_5 = 0x05 MAX30102_LED_PA_6 = 0x06 MAX30102_LED_PA_7 = 0x07 MAX30102_LED_PA_8 = 0x08 MAX30102_LED_PA_9 = 0x09 MAX30102_LED_PA_10 = 0x0A MAX30102_LED_PA_11 = 0x0B MAX30102_LED_PA_12 = 0x0C MAX30102_LED_PA_13 = 0x0D MAX30102_LED_PA_14 = 0x0E MAX30102_LED_PA_15 = 0x0F # Initialize I2C bus bus = smbus2.SMBus(1) # Reset MAX30102 bus.write_byte_data(MAX30102_ADDRESS, MAX30102_REG_MODE_CONFIG, 0x40) time.sleep(1) # Set sample rate to 100Hz bus.write_byte_data(MAX30102_ADDRESS, MAX30102_REG_SPO2_CONFIG, MAX30102_SAMPLING_RATE_100) # Set LED pulse amplitude for LED1 and LED2 bus.write_byte_data(MAX30102_ADDRESS, MAX30102_REG_LED1_PA, MAX30102_LED_PA_6) bus.write_byte_data(MAX30102_ADDRESS, MAX30102_REG_LED2_PA, MAX30102_LED_PA_6) # Set multi-LED mode configuration for LED1 and LED2 bus.write_byte_data(MAX30102_ADDRESS, MAX30102_REG_MULTI_LED_CTRL1, 0x23) bus.write_byte_data(MAX30102_ADDRESS, MAX30102_REG_MULTI_LED_CTRL2, 0x01) # Set mode to HR only bus.write_byte_data(MAX30102_ADDRESS, MAX30102_REG_MODE_CONFIG, MAX30102_MODE_HR_ONLY) # Read data from MAX30102 while True: # Read FIFO data count fifo_data_count = bus.read_byte_data(MAX30102_ADDRESS, MAX30102_REG_FIFO_WRITE_POINTER) - bus.read_byte_data(MAX30102_ADDRESS, MAX30102_REG_FIFO_READ_POINTER) if fifo_data_count > 0: # Read FIFO data fifo_data = bus.read_i2c_block_data(MAX30102_ADDRESS, MAX30102_REG_FIFO_DATA, 6) # Print heart rate print("Heart rate: ", fifo_data[3]) ``` 这是一个基本的读取心率值的示例,你可以根据需要进行修改和扩展。请注意,MAX30102的配置可能因制造商而异,因此在使用此代码之前最好查阅一下设备的数据手册。
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