99iot co. ltd 99IOTW121 ユーザーズマニュアル
99IoT (Shenzhen) Co., Ltd.
User_Manual
User Manual of AF-W12xTx Wi-Fi Module
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5
Communication serial port
In general, it is recommended to communicate with other MCU through this serial port,
the pins which need to be connected are shown in following figure: [PIN16], [PIN17]
are optional. These two pins are used to achieve fluid control.
the pins which need to be connected are shown in following figure: [PIN16], [PIN17]
are optional. These two pins are used to achieve fluid control.
6
RF design and layout issues
6.1
RF selecting resistor
R4
R3
R5
Selecting RF antenna through
above selection of 0Ω resistor:
R3 selects [pin5] RF pin;
R4 selects IPEX outer antenna
pedestal;
R5 selects onboard antenna.