FAQ about UART Non-contact Optical Turbidity Sensor 【SEN0554】

Q1: How to calculate the conversion of AD data from sensors into dirty data?

A1: There are two formats for reading data from the host. One is dirty data, which ranges from 0 to 255, and the other is AD data, which ranges from 0 to 4095. For example, if the AD data is 0X64, which is equivalent to 100 in decimal, it needs to be mapped to the range of 0 to 255. The calculation would be 255 * 100 / 4095 = 6, so the dirty data would be 6. The corresponding voltage is calculated as 5V / 255 * 6 = 0.1V.

Q2: Can this sensor operate at a voltage of 3.3V?

A1: Yes, you will need to connect a 33R resistor in series with IO1 and IO2, and then connect it to the corresponding port on the main board.

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