Apr 04, 2020 · The MAX30100 module is connected to 1.8v, which is not a theoretical issue. The communication logic level of the Arduino IIC pin is 5V, so it cannot communicate with Arduino without changing the hardware of the MAX30100 module, however, direct communication is possible if the MCU is an STM32 or 3.3v logic level MCU. The MAX30102 pulse oximeter is an Arduino-compatible and inexpensive sensor that permits The primary components needed for this tutorial are the MAX30102 pulse oximeter and an Arduino...

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    Jan 05, 2020 · The MAX30100 IC uses 1.8V for VDD and this particular module uses two regulators to achieve this voltage. Nothing wrong with that. However, if you look closely, the SCL and SDA pins are pulled-up via the 4.7k ohm resistors to 1.8V!

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    1.1 tips (very important):TXD: Send side, generally expressed as their own sender, normal communication RXD must be connected to another device. RXD: the receiving end, generally expressed as himself on the receiving end, normal communication TXD must be connected to another device.

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