WH-BLE103 Hardware Manual
Shanghai wenheng electronic technology limited
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2.5. Wake up pin
Pin 2 of module is wake up pin and will take effect in low level over 1 second. User doesn’t need to connect to
external pull-up resistor.
2.6. RF interface
RF interface adopts two methods: internally installed antenna and external bonding pad pin antenna. We provide
internally installed antenna WH-BLE103a and external bonding pad pin antenna WH-BLE103b.
2.6.1. WH-BLE103a
User needs to follow these rules when adopts WH-BLE103a solution:
1.On PCB board, user can’t place component on antenna part as follow red line area:
Figure 7 WH-BLE103a antenna part
2.Keep antenna away from metal, maintain a distance at least 10 mm from surrounding high components.
3.Antenna must be placed on edge of board.
4.Antenna can’t be covered by metal shell and keep at least 10mm away from plastics shell.
5.When user places BLE103 on test board, please place BLE103 on the area as follow Figure to reduce influence
to antenna and wireless signal.
Figure 8 WH-BLE103a area
