ESP8266 micropython AT24C02 读写程序

ESP8266微控制器配合Micropython编程可以方便地操作AT24C02类型的EEPROM（Electrically Erasable Programmable Read-Only Memory）。这种存储器常用于保存少量非易失数据。下面是一个简单的示例程序，展示了如何通过AT命令来读取和写入AT24C02的数据：

import machine  # 导入machine模块，它是ESP8266硬件驱动的基础
import utime  # 导入时间模块，用于延迟

# 初始化I2C通信
i2c = machine.I2C(scl=machine.Pin(5), sda=machine.Pin(4))  # I2C引脚设置
at24c02_address = const(0x50)  # AT24C02的默认地址

def write_data(address, data):
    i2c.writeto_mem(at24c02_address, address, bytes(data))
    print(f"Data written at address {address}: {data}")

def read_data(address, length):
    return i2c.readfrom_mem(at24c02_address, address, length)

# 示例写入数据
write_data(0x00, b"Hello, MicroPython!")

# 示例读取数据
read_data_value = read_data(0x00, 6)
print(f"Read data from address 0x00: {read_data_value.decode('utf-8')}")