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RF Serial Data Link
UART - 2.4 GHz
Easily transfer serial data over 2.4 G
H
z RF with these reliable RF
Doc Version
: 1
A q
uality product
, proudly made in India by
Sunrom Part#
1418
modem. Enables transparent bi-directional communication for
microcontroller & computer for wireless data logging and sensor
reading.
User's
Manual
22-Mar-16
http://www.sunrom.com/m/1418
Electronics
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Table of Contents
Introduction .................................................................................................................................... 3
Typical Application ......................................................................................................................... 3
Features .......................................................................................................................................... 3
Applications .................................................................................................................................... 4
Interfacing with Microcontroller or USB-UART TTL..................................................................... 4
Specifications .................................................................................................................................. 5
Module Pin Details.......................................................................................................................... 5
Board Schematic ............................................................................................................................. 6
Top Side Component Layout ...........................................................................................................7
Jumper Settings .............................................................................................................................. 8
Frequency Channel ..................................................................................................................... 8
Baud Rate Setting ........................................................................................................................ 8
Product Dimensions ....................................................................................................................... 9
Support ..........................................................................................................................................10
Disclaimer ......................................................................................................................................10
Doc Version: 1 22-Mar-16
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Introduction
This is a RF data modem working at 2.4 GHz frequency in half duplex mode with automatic
switching of receive/transmit mode with LED indication. Receives and Transmits serial data of
adjustable baud rate of 9600/115200 bps at 5V or 3V level for direct interfacing to
microcontrollers.
RF modem can be used for applications that need two way wireless data transmission. It
features high data rate and longer transmission distance. The communication protocol is self
controlled and completely transparent to user interface. The module can be embedded to your
current design so that wireless communication can be set up easily.
Typical Application
Features
• Automatic switching between and transmit and receive mode in RF
• Bidirectional UART serial data transfer
• Easy to use, Works out of the box without any configuration
• Transparent to microcontroller, No special programming or configuration required.
• Reliable and Sturdy operation
• FSK technology, half duplex mode, robust to interference.
• 2.4 GHz band, no need to apply frequency usage license.
• High sensitivity, reliable transmission range.
• Built in dual color LED indication for Transmit and Receive
• On Board voltage regulator which accepts 3.3V to 5V operating voltage
• Standard UART interface, TTL(3-5V) logic level.
• No tuning required, PLL based self tuned.
• Error checking(CRC) of data in built.
• Stable, small size, easier mounting.
• Built in UART Level convertor for 5V or 3.3V microcontrollers.
• On board jumper to select 9600 or 115200 baud rate
• On board frequency channel selection jumper to modify channel of operation, to avoid
clashing of frequency for multiple pairs in same premises.
Doc Version: 1 22-Mar-16
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Microcontroller
GND
RX TXD RXD TX +3/5
V GND
+3/5
V
Applications
• Sensor Networks / Data collection
• Wireless metering
• Access control / Identity discrimination
• IT home appliance
• Smart house products / Security Systems
• Remote control / Remote measurement system
• Weather stations
Interfacing with Microcontroller or USB-UART TTL
If you want to operate with microcontroller then it's very simple to connect just 4 pins of
modules like below.
If you want to operate with a PC then use a typical USB-UART of TTL level(not RS232) with
same connections like below.
RF Serial Modem
USB-UART TTL
Doc Version: 1 22-Mar-16
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Parameter
Value
Working Voltage
3.3V to 5V DC regulated power supply
Current Consumption
25 mA
Frequency of Operation
2.4 GHz
Serial Baud rate
9600 bps or 1
1
5200 bps depending on jumper setting
Baud rate format
8-N-
1; 1 Start bit, 8 Data bits, 1 Stop B
its, No Parity
RF
Bit rate
250 kbps
RF Power Output
0 dbm
RF range
50-
70 meters
On Board controller
STM8S003F3
RF Chipset
nRF24L01+ Enhanced version
Pin Details
GND
Common Ground
+3.3V/5V
Regulated positive power input 3.3V to 5V
DC TX Transmit Output
- UART TTL level
- Connects to RXD pin of microcontroller
RX
Receive Input
- UART TTL level
- Connects to TXD pin of microcontroller
Specifications
Module Pin Details
Doc Version: 1 22-Mar-16
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Board Schematic
VCC
CN3
SWIM
SWIM
GND
NRST
JB
JF1
JF2
3V3
R1
10K
NRST
C2
100n
VCC
1
2
3
NRST
4
J1
J2
J3
VCC
C1
100n
U1
STM8S003F3
9
VDD
4
NRST
18
SWIM
8
VCAP
C3
1uF 1206
7
VSS
VCC
R3
1K
D2
RED-LED
PD3
PD2
SPI_MISO/PC7
SPI_MOSI/PC6
SPI_SCK/PC5
I2C_SDA/PB5
PC4
PC3
I2C_SCL/PB4
PD4
PD5/TX
PD6/RX
PA3
PA2
PA1
VCC
R4
1K
D3
GRN-LED
20
19
MISO
17
MOSI
16
SCK
15
CE
14
CSN IRQ
13
IRQ
12
TLED
11
JB
1
TX
2
RX
3
RLED
10
JF1
6
JF2
5
VCC
R2
10K
D1
RX RXD
1N4148
R5
100R
TXDTX
VCC
CE
CSN
SCK
MOSI
MISO
1
2
3
4
5
6
7
8
C4
1uF 1206
VDD
CN2
nRF24L01+
GND
3V3
CE
CSN
SCK
MOSI
MISO
IRQ
U2
662K
INOUT
GND
1
CN4
SIP4
4
3
2
1
VDDVCC
32
+
-
C5
1uF 1206
TLED RLED
Sunrom Electronics http://www.sunrom.com
Title
RF Serial Modem - nRF24L01+
Code Rev
1418 1
Date: Sheet of
1 1Tuesday, March 22, 2016
Doc Version: 1 22-Mar-16
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Top Side Component Layout
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Jumper Settings
Frequency Channel
There are two jumpers to set frequency
channel of operation. If you want to operate
multiple pairs on same premises without
interfering with each other you can set this
frequency channel selection jumper.
Default we provide it both open. Set a
unique combination for the jumper like one
short and one open or both short on pair
you wish to operate. Changing this setting
will deviate the frequency +/- 1 Mhz of
operation from the default and only
modules having same jumper setting will be
able to communicate.
Baud Rate Setting
There is a PCB jumper on board on bottom
side of PCB. We provided it open condition
which means 9600 bps baud rate. You can
short it with a soldering iron, if you want
115200 bps baud rate for module.
Doc Version: 1 22-Mar-16
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Product Dimensions
Board Dimensions in mm
Doc Version: 1 22-Mar-16
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Support
Sunrom Electronics offers free technical support (www.sunrom.com/contact) for
customers, until the end of the product’s lifetime, so if something goes wrong, we’re ready and
willing to help!
Technical Support is available by email only and scope is limited to problem faced during use of
the use of product and does not cover end user programming and hardware troubleshooting.
Each product passes through strict quality checks before it reaches you. So if something is not
working out right, the first thing to doubt is the connections or programming of your hardware.
Disclaimer
Sunrom Electronics assumes no responsibility or liability for any errors or inaccuracies that may
appear in the present document. Specification and information contained in the present
schematic are subject to change at any time without notice.
Copyright © 2016 Sunrom Electronics. All rights reserved.
Doc Version: 1 22-Mar-16
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