User's Manual

3. Application notes
1) It is forbidden to lay copper under the antenna area of the
module to avoid affecting the RF signal.
2) The antenna should be far away from other circuits to
prevent the radiation efficiency from becoming low and
affecting the normal use of other circuits.
3)The module should be placed as far away as possible from
other low-frequency circuits, digital circuits
4)If there are other frequency band wireless modules inside, it
is necessary to plan the frequency reasonably and take
measures such as shielding to reduce harmonic interference
and intermodulation interference
Impact.
5)There are CMOS devices in this module, so be careful to
prevent static electricity during transportation and use.