User's Manual

RN4020
DSXXXXXXXXA-page 10  2014 Microchip Technology Inc.
7.0 SUPPORTED SERVICES
The RN4020 firmware support the following built-in pro-
files listed in Ta b l e 7- 1 below. The services are enabled
via Command API and serviced in the same manner.
Each service manages “Characteristics” which as data
values are declared and defined by Bluetooth. The val-
ues for ea ch characteristic are ca ched in modules
memory and can be read by another Bluetooth device,
such Smartphone acting in Central role. The values of
every Characteristic are updated via Command API
over UART.
7.1 Public and Private Services
The RN4020 provided the ability to cre ate customer
services. If the services a re supported on both end
points of a Bluetooth Low Energy connection, such as
Central and Peripheral devices, data can be
exchanged. For example, two RN4020 modules can
define a custom (private) service with its own u nique
characteristics. Data can be exchanged easily via
Command API.
Private services are not registered with the Bluetooth
SIG, and therefore not in teroperable with other Blu e-
tooth Low Energy device s, unless the device imple-
ments the private service. An example of a bui lt-in
private service is Microchip Streaming Data service.
Refer to “ RN4020 Command Reference”, docxxx-
xxxxxx, and Application Note AN-xxxxxx for an exam-
ple on h ow to crea te a custom service using the
RN4020.
7.2 PCB Antenna
The PCB antenna is fabricated on the top copper layer
and covered in solder mask. T he layers below the
antenna do not have copper trace. It is recommended
that the module is mounted on the edge of the host
PCB. It is permitted for PCB material to be below the
antenna structure of the module as long as no copper
traces or planes are on the host PCB in that area.
FIGURE 7-1: EFFICIENCY
FIGURE 7-2: ANTENNA PLOT
TABLE 7-1: SUPPORTED PUBLIC
SERVICES ON RN4020
Service Name Bluetooth SIG UUID
Device Information 0x180A
Battery 0x180F
Heart Rate 0x180D
Health Thermometer 0x1809
Glucose 0x1808
Blood Pressure 0x1810
Running Speed Cadence 0x1814
Cycling Speed Cadence 0x1816
Current Time 0x1805
Next DST Change 0x1807
Reference Time Update 0x1806
Link Loss 0x1803
Immediate Alert 0x1802
TX Power 0x1804
Alert Notification 0x1811
Phone Alert Status 0x180E
Scan Parameters 0x1813
TABLE 7-2: ANTENNA
CHARACTERISTICS
Specification Description
Type PCB
Frequency Range 2.402 to 2.485 MHz
Peak Gain -0.23 dBi
DRAFT