update README.md.

Signed-off-by: 慕炎 <29385962@qq.com>
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慕炎 2022-08-27 02:11:46 +00:00 committed by Gitee
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@ -13,7 +13,10 @@ PCB工程修改自Gggggg的立创版本 esp32 mppt - 嘉立创EDA开源硬件平
**高压端检测版本** 电压不要超过36V否则可能损坏ina226
**低压端检测版本** 待验证
**低压端检测版本** 已验证不过低侧会讲esp32等耗电计入到输入端程序部分需要自行修改 2_Read_Sensors.ino ,将
`CSI_converted = ina1.readShuntCurrent();`
修改为
`CSI_converted = -ina1.readShuntCurrent();`
#### 软件架构