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4. Recommended Connection Diagram
Table 4-1 Description
Brief description of the connection between the module and the MCU (the above figure uses the STM8L MCU
No.
1
The UART module is TTL level, please connect with TTL level MCU.
2
For some 5V MCU, it may be necessary to add 4-10K pull-up resistors to the TXD and AUX pins of the module.
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Figure 4-1 Recommended connection diagram
as an example)
E220-400T30D User Manual
7
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