RC11xx(HP)-TM
RC25xx(HP)-TM
RC17xx(HP)-TM
2016 Radiocrafts AS
RC11xx(HP)/25xx(HP)/17xx(HP)-TM Data Sheet rev. 1.48 Page 41 of 86
2016 Tiny Mesh AS
Radiocrafts
Embedded Wireless Solutions
Low Power
High Power
Pulse Counts
with De-bounce Timer
off
Wake
Time Res = 0
Wake
Time Res = 6
10
000 000
600 000
10
000 000
60
0
000
Pulse counts
with
De-bounce Timer = 10ms
140 000
140 000
Message Transmissions
in Walk by Mode
30 000
2 100
Message Transmission with
Acknowledge in live mesh network
5 500
1 600
Key figures, instances per consumed
mAh. Assumptions
:
RF Data Rate
5, RF POWER 5.
Analogue Port Sampling by End Devices
The Sliding Average function, employed when analogue ports are sampled by Router- and Gateway
Devices (
ANALOGUE INPUT
), will not be activated by End Devices, as the time required for the sliding
average calculation would require the module to be kept awake, and power consumption would be too
high for normal battery operation.
When analogue port sampling is activated, by
GPIO
0 or 1 set for Analogue Input, the module will stay
awake for at least one
GPIO 0 ANALOGUE SAMPLING INTERVAL
, or
GPIO 1 ANALOGUE SAMPLING
INTERVAL
to allow a timed
STATUS MESSAGE (IMA)
message to represent the current status of the
active analogue port(s).
Module Awake Output Function
In End Device applications, there will often be a need to power up external sensor devices only while the
module is awake. While in sleep mode, such sensors may represent an undesirable power
consumption, and should be switched off.
The Tinymesh™ module supports external device power control by the Module Awake Function. A
dedicated GPIO output will go low on module wake-up, and return high as the module returns to low
power sleep mode. This output may be used to switch off power to external devices, e.g. using a
MOSFET transistor as the power switch.
Enable the Module Awake Function by selecting the desired GPIO port in the
END DEVICE AWAKE PORT
parameter. Also, remember to activate the same GPIO for output function by setting the port
GPIO
configuration for the port to act as a normally high output
Fixed Destination and “Walk By” Mode
End Devices and Routers may be configured to assume a permanent connection to a pre-defined
device UID.
When the
FIXED DESTINATION ID
parameter in
CALIBRATION MEMORY
has been changed to a value
different from the default 0 0 0 0 setting, the Router or End Device will always attempt delivery of data
packets to this UID, regardless of whether the previous delivery was acknowledged or not.
If no Acknowledge is received, the Router or End Device will attempt delivery
RF TRANSMIT RETRY
LIMIT
number of times before giving up. The End Device will then return to sleep, while a Router will
discard the packet as undeliverable.
The 'Walk By' mode is a variety of the Fixed Destination setting. 'Walk By' is enabled by selecting the
broadcast address '255 255 255 255' as the
FIXED DESTINATION ID.
By enabling 'Walk By', the Device will skip waiting for receipt acknowledge of dispatched data, and End
Devices immediately return to sleep mode after transmitting a data packet.
The Walk By function works for all types of message dispatches from a device, either the message is
from serial data received on the UART, a status-triggered message or generated by the internal IMA
timer.
Walk By is typically applied for metering- and pulse counter applications, where updated
STATUS
MESSAGE (IMA)
messages should be transmitted at regular time intervals.
The
STATUS MESSAGE (IMA)
event message contains current status of all digital- and analogue inputs,
module temperature and module voltage level, as well as the current status of the pulse counter, either
in 2- or 4-byte format.
