Connect To Mcu; Function Description; Fixed Transmission - Ebyte E31-433T17D User Manual

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4. Connect to MCU

No.
1 The UART module is TTL level， pls connect to the M CU of TTL..
2 For some M CU 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）
E31-433T17D User Manual
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