Data Sheet

HJ-531IMF
TangShan HongJia Electronic Technology Co., Ltd.
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C. On the wireless module antenna, Do not place other components. Because other components
can degrade wireless performance.
D. The wireless module should be placed on the four sides of the motherboard as much as possible.
The antenna part should be close to the side or corner of the motherboard. The motherboard PCB under
the module antenna should be hollowed out with the keepout layer. If hollowing is prohibited, copper
or wiring is not allowed under the antenna. Otherwise it will affect RF performance.
E. Please pay attention to the pin diagram for all pins. Please pay attention to the IO mode and
status of the IO connected to it.
F. GND must be sound grounding.
G. It is recommended that magnetic beads or inductance filters be applied to the input power
supply.