Hobby Components SmartRFy HCMODU0141 User manual

SmartRFy Sensor Module
Manual
HCMODU0141
Revision 1.1.0

DISCLAIMER
SmartRFy modules are micro power short range devices (SRD) using the 433MHz frequency band.
This frequency band is licensed exempt (within certain restrictions) in many countries including
the UK, Europe, Asia, and the US. It is the end users responsibility to ensure that it is legal to
operate devices in this frequency band within your own country before use.
As with all wireless devices, external factors such as range and interference may cause transmissions to
be corrupted or blocked. Therefore these devices should not be used in applications where control or
monitoring is a critical requirement.
This document is provided "as is". Hobby Components Ltd makes no warranties, whether express,
implied or statutory, including, but not limited to, implied warranties of merchantability and fitness for a
particular purpose, accuracy or lack of negligence. Hobby components Ltd shall not, in any
circumstances, be liable for any damages, including, but not limited to, special, incidental or consequential
damages for any reason whatsoever.
COPYRIGHT NOTICE
This manual, including content and artwork is copyright of Hobby Components Ltd and may not be
reproduced without written permission. If you paid for or received a copy of this manual from a source
other than Hobby Components Ltd, please contact us at [email protected]
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Table of Contents
SmartRFy system overview 4
SmartRFy sensor module 7
Features 8
Specification 9
Sensor Module Features 10
Power 10
DHT22 Temperature / Humidity sensor 10
PIR 11
LDR 12
Auxiliary switch output 12
LEDs 13
Serial UART 14
Command interface feature 14
Wireless serial port feature 14
Default configuration settings 15
Clear (Factory Reset) 15
SmartRFy commands 16
Command formats 16
Command format requirements 16
Local command format 17
SmartRFy generic commands – quick lookup table 18
Sensor module specific commands – quick lookup table 19
Generic SmartRFy commands 20
Firmware version (FWV?) 20
Get the modules zone (ZON?) 21
Get the modules address (ADD?) 21
Serial serial timeout time (STO=) 21
Set the baud rate (BUR=) 21
Set number of transmit resends (TRS=) 22
Set the serial verbose mode (VBM=) 23
Set the modules zone number (ZON=) 23
Set the modules address (ADD=) 24
Turn on/off repeater mode (TRP=) 24
Factory reset (FTRE) 25
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SmartRFy sensor module commands 26
Get Humidity (HUM?) 26
Humidity transmit time (HTT=) 26
Humidity transmit name (HTN=) 27
Get Temperature (TMP?) 27
Temperature transmit time (TTT=) 27
Temperature transmit name (TTN=) 28
LDR transmit time (LTT=) 28
LDR transmit name (LTN=) 29
PIR transmit name (PTN=) 29
Set the state of the digital output pin (SW0=) 29
Set an alternative name for the digital output pin (SWN=) 30
Set the output pin high time (SWO=) 30
Set the threshold value to set the output pin high (STH=) 31
Set the threshold value to set a digital pin low (STL=) 31
Set the test condition for setting the output pin high (SMH=) 32
Set the test condition for setting the output pin low (SML=) 33
Appendix A: Example auxiliary output pin modes 34
Default trigger mode 34
Timer mode 35
Threshold mode 35
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SmartRFy system overview
SmartRFy modules are a range of wireless modules that provide a simple low cost way of
controlling and monitoring remote devices and sensors. They are designed to work at their
basic level with no programming required. However, when reconfigured or controlled via
their serial interface they can also provide more complex and even autonomous functions.
SmartRFy modules work by wirelessly communicating with one another using simple text
based commands - for example, to turn on a remote relay a command such as RLY=1 can
be sent, and to turn it back off RLY=0. These commands can be automatically sent from
one module to another or can be sent by a user via a modules serial interface to manually
control modules on the SmartRFy network.
They are addressable and can be grouped into one of 255 zones, with each zone capable
of individually addressing 255 devices, giving a total of over 65,000 unique addresses.
SmartRFy modules are designed to be both easy and flexible to use by providing three
levels of control:
Zero configuration (out-of-the-box)
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With no configuration at all the SmartRFy range of modules allow basic functionality such
as remotely switching relays, digital pins, or monitoring sensors, such as temperature,
humidity, light, motion etc. All SmartRFy modules default to the same zone and address
and so can respond to, or control, other modules without the need to modify any zone or
address settings.
Serial port configuration
Example: Remote 1CH relay module configured to turn on light when local modules PIR is
triggered and second remote relay module is configured to control a heating device based
on local modules temperature sensor readings.
All smartRFy modules include a serial port which allows them to be re-configured using
simple text based commands. These text commands allow changing of configuration
settings and control of specific features of each module. Any setting changes are stored by
the module's non-volatile memory and so are retained even when power is removed from
the module. When reconfigured they are able to perform more complex functions and even
some basic autonomous tasks. For example, a SmartRFy relay module can be
reconfigured to control a heating system based on the temperature transmitted from a
remote sensor or, turn on a flood light for a set amount of time when triggered by a remote
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PIR – all without any additional hardware. Serial port configuration also allows a modules
zone and address (all SmartRFy modules default to zone and address 0) to be changed.
This provides the option for modules to be placed into groups, which will then only respond
to other modules with a matching zone or address.
Slave controlled
Example 1: Turning on a remote relay with zone =1 and address = 5
Example 2: Send plain serial text “Hello” to a remote microcontroller
SmartRFy modules can also be controlled via their serial port by other devices such as
microcontrollers or computer based automation software such as Node-RED. Using a
SmartRFy module as a slave device (must be capable of transmitting/receiving) gives a
master device the ability to monitor and control any other SmartRFy devices on the
network regardless of their zone and address. SmartRFy modules can even be used as a
passive wireless serial port for passing non-SmartRFy data to other remotely connected
devices.
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SmartRFy sensor module
The SmartRFy sensor module adds the option to remotely monitor various sensors via a
SmartRFy network connection. The sensor module includes a temperature and humidity
sensor (DHT22) and has the ability to measure ambient light levels via an integrated
photo-resistor. Out of the box the module will automatically transmit readings from these
sensors once every 60 seconds (when reconfigured via the module serial port this can be
changed from 10 to 65535 seconds) which can then be received by other SmartRFy
devices with receive capability. For example remote sensor readings can be read directly
into a computer via a SmartRFy USB module, or a SmartRFy relay module can be
configured to trigger depending on sensor values transmitted from a remote sensor
module.
The sensor module also includes a header for interfacing common types of 5V PIR motion
detectors (see SKU: HCMODU0003). By default the sensor module will transmit the state
of a connected PIR whenever its state changes. This transmitted state may then be used
by any suitably configured remote SmartRFy module capable of receiving its data.
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Additionally, the sensor module includes an auxiliary digital output (labelled SW). This pin
can be reconfigured via the sensor module's serial interface to automatically trigger based
on max and min values of one of the module's sensors.
Features
● Local and remote control via simple text based serial commands.
● Up to 255 zones and 255 addresses (default zone 0, address 0).
● Basic automation features (requires a USB to serial adaptor or microcontroller for
configuration).
● Compatible with most microcontrollers featuring a serial UART interface.
● Wireless serial communication with 8 different baud rates (9600 default).
● Built-in temperature and humidity sensor (DHT22).
● Built-in light sensor (photoresistor).
● Automatically read and transmit temperature, humidity, and light levels (will transmit
readings once every 60 seconds by default).
● Can automatically transmit state changes from a connected PIR sensor.
● Auxiliary digital output can be programmed to automatically trigger based on
readings from any of the connected sensors and supports on/off, toggle, and timer
modes.
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Specification
Model number:
HCMODU0141
Supply Voltage:
4.5 to 5.5V
Supply current min:
9.5 mA (idle)
Supply current max:
21 mA (transmit)
Operating frequency:
433MHz (OOK)
Operating range:
30 Meters (unobstructed)
Temperature sensor range:
-40 to 80 oC
Temperature sensor resolution:
0.1oC
Humidity sensor range:
0 to 10 %RH
Humidity sensor resolution:
0.1 %RH
LDR sensor range
0 to 255
PIR input (S) pin characteristics
Input logic low voltage: -0.3V to Vdd x 0.3V
Input high voltage Vdd x 0.7 to Vdd + 0.3V
Aux digital output (SW0):
Open collector with 10K pullup. 100mA max sink
current
Interfaces:
RF Tx, serial UART, PIR, and relay Aux digital output
Module dimensions (WxDxH):
44.2 x 36.6 x 20mm
All measurements taken at Vdd=5V, 25 
o 
C
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