Ebyte E220-400T22D - Recommended Connection Diagram; 4.1 Recommended connection diagram

Chengdu Ebyte Electronic Technology Co., Ltd. E220-900T22D User Manual
Copyright ©2012–2020，Chengdu Ebyte Electronic Technology Co., Ltd.
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4. Recommended Connection Diagram
Figure 4-1 Recommended connection diagram
Table 4-1 Description
No.
Brief description of the connection between the module and the MCU (the above figure uses the STM8L MCU
as an example)
1
The wireless serial port 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.