Operates at 3.3V, so if using with a 5V MCU, include logic level shifters on the data lines to prevent damage. The module don?t have a 3.3V regulator so you must power with 3.3V.
This is a write only device and doesn?t need the SPI MISO line hooked up. The module also doesn?t bring the CS pin out to the interface which helps to lower the pin count. Unfortunately, it can?t be used with other SPI devices on the same bus simultaneously.
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