Users Manual Part 1
Page 13 of 21
Figure 4-3 Module recommended reference placement
Note: When designing, users should pay attention to that there is a window opening area (that
is, exposed copper) in the test pad for testing the RF performance of the Bottom layer of the module
product. . As shown in the picture, the position of the green box is the position of the test point, and
the specific size refers to the actual object
4.3Distancetestinstructions
① Indoor distance test: test the distance in the office of Lierda Park, the module is 1 meter
above the ground, the broadcast power is 0dBm, and use the mobile phone LightBlue to
test whether the module can be connected. The test results can be connected normally at a
distance of about 30 meters. The following figure is the number of Bluetooth devices in the
test environment, where the device information Nordic_Blinky is the device under test.
Figure 4-4 Number of Bluetooth devices in the test environment