Connect To Mcu; Function Description; Fixed Transmission - Ebyte E22-400T22S1C User Manual

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4. Connect to MCU

No.
1 The UART module is TTL level.
2 For some MCU works at 5VDC, it may need to add 4-10K pull-up resistor for the TXD & AUX pin.

5 Function description

5.1 Fixed transmission

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Description（STM8L MCU）
E22-400T22S1C User manual
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