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YO Modbus User guide v2.1 page 18/33
POLL AND QUERY PARAMETERS
NAME DESCRIPTION POSSIBLE
VALUES DEFAULT
VALUE READ/
WRITE
name Name of query, up to 10
characters
“0-9, A-Z, a-z,_
. ,” e.g.
aB.cD-01
— R/W
slaveaddr Number of slave addresses to
communicate with 0–255 1 R/W
funccode Supported Modbus function
codes
1, 2, 3, 4 3 R/W
startreg Start register to read data
from 2B (HEX), e.g.
1000 — R/W
regnbr Number of words (2 bytes) to
read from registers, begins
from ’startreg’
1–8 1 R/W
cnt LoRa packet collection index
number. Each packet can
contain 5 queries. 1–30 — R/W
out Name of the query to be
transmitted in a LoRa packet.
“0–9 A–Z a–z
. ,”e.g.
aB.cD-01
— R/W
Parameters description
- nwktype: network type, for setting the device operation to public or private.
- acttype: activation type for setting the device in ABP or OTAA mode.
- deveui, … , appskey: predefined addresses and keys, these parameters are generated using
multiple IDs specific to the particular MCU and are unique for each device. They can be
changed if needed.
- interval: the interval between broadcast packets, used to connect to every BLE receiver
around the device.
- subband: the communication frequency sub-band.
- measinterval: measurement interval [s] between sending LoRa packets.
- teminationresistor : whether a resistor is applied to the end line to prevent signal reflections
for correct signal transmission. Value “
TRUE
” means that the resistor is installed.
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