IQRF RC4-01 User manual

© 2018 MICRORISC s.r.o. www.iqrf.org User_guide_RC4-01_180629 Page 1
RC4-01
IQRF remote controller
User’s guide

RC4-01
© MICRORISC s.r.o. www.iqrf.org User_guide_RC4-01_180629 Page 2
Description
RC4-01 is a universal user-programmable remote controller for IQRF
platform. It is a generic device. Thus, the hardware is fixed and the user-
specific functionality is achieved by the software developed by a user’s
application engineer. The code can be uploaded wirelessly.
Key features
IQRF transceiver TR-76DA inside
Bidirectional RF communication providing high security in comparison
to unidirectional systems
4 pushbuttons
2 LEDs (visible through one peephole)
Ultra low power consumption
Coin battery CR2450
IP66 protection
Programmable via RF (wireless upload). For development and service,
also wired upload is possible.
Applications
Remote controller for arbitrary use
Internet of Things
Block schematics

RC4-01
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Electrical specifications Typical values (until otherwise specified)
RF transceiver TR-76DA
Antenna PCB meander built in the transceiver board
RF band 868 MHz or 916 MHz, multiple channels, SW selectable
Effective radiated power Programmable in 8 levels up to the following values:
868 MHz band 6.5 dBm
916 MHz band 2.0 to 6.5 dBm (Depends on the RF channel. See TR-76D datasheet,
diagram ERP vs. channel)
RF range Up to 460 m1, up to 280 m2
Other RF parameters See TR-76D datasheet
Battery CR2450, 3V, 550 mAh, lithium coin cell 24.5 mm x 5 mm
Supply current
TR in Deep sleep mode 100 nA (all TR peripherals inactive, LEDs off, pushbuttons not pressed)
TR in Sleep mode 700 nA (all TR peripherals inactive, LEDs off, pushbuttons not pressed)
Additional supply current
TR not in sleep mode See TR-76D datasheet
LED on 4 mA per LED (rough value for brief guidance only)
Pushbutton pressed 65 µA per pushbutton (rough value for brief guidance only)
Temperature
Operating -10 °C to +50 °C
Storage -10 °C to +30 °C. Higher temperature impacts the battery lifetime.
Size 43 mm x 15.5 mm x 72 mm
Weight 34 g
Note 1: Arrangement: RC4-01 vertically, 1.6 m above the ground. Counterpart: TR-72DA transceiver plugged in
DK-EVAL-04A kit, vertically, 1.6 m abovethe ground. Bidirectional communication, in free space.
Test software: E09-LINK example (STD mode, setRFpower(7), checkRF(0)).
Note 2: Arrangement: RC4-01 held in the hand, horizontally, with the longitudinal axis oriented towards the
counterpart TR, 1.1 m above the ground. Counterpart: TR-72DA transceiver plugged in DK-EVAL-04A kit,
vertically, 1.6 m above the ground. Bidirectional communication, in free space.
Test software: E09-LINK example (STD mode, setRFpower(7), checkRF(0)).
Absolute maximum ratings
Stresses above those values may cause permanent damage to the device. Exposure to maximum rating conditions for
extended periods may affect the device reliability.
Supply voltage 3.5 V
Storage temperature -10 °C to +50 °C. Higher temperature impacts the battery lifetime.

RC4-01
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Hardware
Simplified schematics
Power supply
RC4-01 is supplied from the 3 V, 550 mAh lithium non-rechargeable coin 24.5 mm x 5 mm battery CR-2450. It is possible to
use even a battery with higher capacity, e.g. 620 mAh. Exchanging is possible after unscrewing the rear cover. The polarity
must correspond to the silkscreen marking at the bottom PCB side. RC4-01 is protected against damage due to the wrong
polarity.
The power supply can not be switched off at all (unless removing the battery), the TR sleep mode should be used instead of
this. See chapter Sleep mode below.
TR transceiver
The TR-76DA transceiver with built-in PCB antenna is used.
Because the TR is soldered (non-removable), the recommended way
to upload the application code into TR is wireless upload (RFPGM).
Thus, the application engineer should keep a method how to enter
RFPGM during development. See chapter Demo application for details.
However, it is also possible to use wired upload. In this case, the TR
upload interface (with soldering pads only) is intended to connect the
CK-USB-04A programmer by wires. Refer to the CK-USB-04A User’s
guide, chapter In-circuit upload.
Bottom view

RC4-01
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Pushbuttons
The functionality of all four pushbuttons S1 to S4 is fully under control of the application software.
All pushbuttons are active at log. high level. To provide log. low level in the inactive state, the pushbutton pins have on-board
pull-down resistors.
The pushbuttons have no hardware protection against contact bouncing when pressed and released. The protection should
be ensured in software.
Arrangement:
LEDs
Green LED and red LED are connected to TR pins dedicated to IQRF OS and DPA indication. Additionally, during normal
operation, the functionality of both LEDs is under control of application software. They are active at log. high level.
Both LEDs are visible through one peephole.
Hardware revision
v1.01 First release.

RC4-01
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Operation
Battery low indication
OS function getSupplyVoltage() should be used to check the battery. The Demo example uses approx. 2.6 V as the
threshold voltage.
Sleep mode
To minimize the supply current, it is possible to switch off all functions and peripherals and put the TR into Sleep mode.
Wake-up is possible when any pushbutton is pressed. For the Sleep mode configuration and control, refer to the Demo
example included.
In special cases (e.g. for long-lasting storage), the Deep sleep mode with even less power consumption can be utilized.
Pushbuttons
The protection against contact bouncing should be performed in software. See the Demo example.
Besides of the essential purpose (sending RF packets for remote control), the pushbuttons can also be used for other tasks,
e.g. to switch the RC4-01 to/from the RFPGM mode (wireless TR upload). The Demo example illustrates launching RFPGM
when the pushbuttons S3 and S4 are pressed long at the same time and premature terminating RFPGM by the short press
of any pushbutton.
LEDs
IQRF OS uses both LEDs for RFPGM mode indication. Refer to the IQRF OS User’s guide, chapter RFPGM for description.
The application SW can managed LEDs directly (e.g. LEDG = 1;) or utilizing the appropriate OS functions (e.g.
pulseLEDR()).

RC4-01
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Demo application example
The RC4-01 functionality can be designed fully according to the user’s desire. The Demo application example RC4-01_demo
provided with this product can be used for non-networking applications, either as it is or it can freely be adapted as required.
The Demo illustrates transmitting of unidirectional non-networking packets. They can be received e.g. by a TR-72DA
transceiver with the E03-TR example uploaded. Every received packet is indicated by the red LED flash. Received data can
be visualized e.g. when the receiving TR is plugged in the CK-USB-04A development kit connected to PC with the IQRF IDE
Terminal running.
The Demo application can be downloaded from RC4-01 product page and E03-TR is one of IQRF Basic examples, available
in the IQRF Startup package. To upload the Demo .HEX file via RF, see the IQRF OS User's guide, Appendix RFPGM.
Switching to RFPGM mode after reset is enabled by default.
In the idle state, the controller stays in Sleep mode, allowing wake-up by any pushbutton. After wake-up, the battery voltage
is checked and LEDs flashing indicates pressing the button and the accumulator condition. Then the respective command is
performed and the controller gets to sleep again. Besides the information about the pushbutton, every transmitted packet
also reports the battery status.
Buttons Function
S1 Text sent: "S1x" x=0 if battery O.K., otherwise x=1
S2 Text sent: "S2x" -"-
S3 Text sent: "S3x" -"-
S4 Text sent: "S4x" -"-
S3 and S4 for more than 5 s Enter RFPGM mode
Any button for more than 0.7 s Leave RFPGM mode
LED indication
Button S1 to S4 pressed 1 x flash green (battery O.K.) / red (battery exhausted).
RFPGM indication See the IQRF OS User's guide, Appendix RFPGM, indication in RFPGM LP mode.
This Demo can also plug-and-play remotely control the relays on IQRF development kit DDC-RE-01 in the following
configuration:
See the comments in the DDC-RE-01 Demo example source code provided with this kit.

RC4-01
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Caution: The Demo software version should correspond to IQRF OS version implemented in RC4-01.
To read out the OS version, catch Module Info which is always sent by this Demo application just before switching to RFPGM
mode in IQRF IDE Terminal. The Data HEX checkbox should be activated for this. OS version is stored in buffer
moduleINFO[4]. See the picture below and IQRF OS Reference guide.
Example:
moduleINFO[0–7]:
[0] [1] [2] [3] [4] [5] [6] [7]
D5 CF 10 81 42 B4 B8 08
moduleINFO[4] = 42 means OS v4.02D
Caution:
The standard way how to upload the user application into the RC4-01 is RFPGM (in-circuit wireless programming). The
Demo application RC4-01_demo.c invokes the enableRFPGM() function first. It ensures that after every reset (due to
reconnecting the battery) the device is switched to RFPGM mode and can possibly be reprogrammed. This feature can
be removed (by disableRFPGM()), but it should not be done unless there is another reliable way how to invoke back the
RFPGM mode using runRFPGM() after pressing a pushbutton. See the Demo application and refer to the IQRF OS User's
guide, Appendix RFPGM for details. If being omitted, the device can not be reprogrammed wirelessly anymore until it is
recovered by wired upload using the PCB pads inside the case only.
Tip: If wired upload via the PCB pads is not comfortable for you, always use enableRFPGM() during the development.

RC4-01
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Product information
Ordering code
RC4-01 Generic IQRF remote controller
Supplied contents
RC4-01 Generic IQRF remote controller. TR-76DA inside, with RC4-01_demo uploaded, TR in sleep when
delivered from the factory.
BK-CR2450-1B Lithium coin cell battery CR2450 (550 mAh) inside
Charm chain Not included
Hardware revision
v1.01 First release
Document history
180629 First release

RC4-01
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Sales and Service
Corporate office
MICRORISC s.r.o., Prumyslova 1275, 506 01 Jicin, Czech Republic, EU
Tel: [phone], Fax: [phone], www.microrisc.com
E-mail (commercial matters): [e-mail]
Technology and development
www.iqrf.org
E-mail (technical matters): [e-mail]
Partners and distribution
www.iqrf.org/partners
Quality management
ISO 9001 : 2009 certified
Complies with ETSI directives EN 301 489-1 V1.9.2:2011, EN 301 489-3 V1.6.1:2013,
EN 300 220-1 V3.1.1:2017, EN 300 220-2 V3.2.0:2017 and ERC Recommendation
70-03 (2017) and VO-R/10/05.2014-3.
Complies with directives 2011/65/EU (RoHS) and 2012/19/EU (WEEE).
Trademarks
The IQRF name and logo are registered trademarks of IQRF Tech s.r.o.
PIC, SPI, Microchip and all other trademarks mentioned herein are the property of their respective owners.
Legal
All information contained in this publication is intended through suggestion only and may be superseded by updates without
prior notice. No representation or warranty is given and no liability is assumed by IQRF Tech s.r.o. with respect to the
accuracy or use of such information.
Without written permission, it is not allowed to copy or reproduce this information, even partially.
No licenses are conveyed, implicitly or otherwise, under any intellectual property rights.
The IQRF® products utilize several patents (CZ, EU, US).
On-line support: [e-mail]