MPL3115

周添鹏周 — Tue, 03 Feb 2026 22:53:48 GMT

对与MPL3115，想把测量精度提高到1.5Pa，怎么设置？我的配置为初始化，前面为地址，后面为数据，

I2C_WriteReg(0x26,0x01);

I2C_WriteReg(0x13,0x07);

I2C_WriteReg(0x26,0x39);

然后写 I2C_WriteReg(0x26,0x3B);

等待8ms，向地址0X01,0X02,0X03读取数据，在自然状态下，20位数据，后6位会跳动，如果能精确到1.5Pa，最多后4位跳动才对啊

Re: MPL3115

georgeguo — Wed, 18 Nov 2015 06:12:43 GMT

Dear Mr. Zhou,

Please note the pressure reading noise of MPL3115 is 1.5Pa when you set the OSR is 128x.

But the absolute accuracy of MPL3115 is +/-0.4kPa, and relative accuracy is up to +/-0.1kPa.

Please review the datasheet of this sensor.

Thanks,

George Guo