User's Manual

WA020100 - Smart Irrigation Controller
UMAOC001 Rev G
USER MANUAL
Page 10 of 33
Activation method
Watersens can be configured in 2 different methods depending on user preferences (security, band occupancy
time, etc)
 OTAA (Over The Air Activation Method). Watersens receive a device address and an authorization
token from which to derive sessions keys in combination with AppKey parameter after sending a
JOIN request to the server. This method provides high level of security.
 ABP (Activation By Personalization). Sessions keys and device network address are predefined.
Watersens doesn’t send a JOIN request to server but the security level is lower than OTAA method.
Application EUI (AppEUI)
This parameter is used in OTAA method. It identifies the application during JOIN request. The length is 8 bytes.
Application KEY (AppKey)
This parameter is used in OTAA method. It encrypts data during the JOIN request. The length is 16 bytes.
Device Address (DevAddr)
This parameter is used in ABP method. It is the address in the Lora Network. The length is 4 bytes
Device EUI (DevEUI)
This parameter is used in ABP and OTAA method. The value cannot be modified (predefined in factory) and it
is used to identify the device in Lora Network (it’s unique for each device). The length is 8 bytes
Application Session Key (AppSKey)
This parameter is obtained automatically in OTAA mode, but must be defined by user in ABP mode. The
Application Session Key encrypts data during transmission and other applications which can access to the
network cannot see the content of messages. The length is 16 bytes.
Network Session Key (NwkSKey)
This parameter is obtained automatically in OTAA mode, but must be defined by user in ABP mode. The
Network Session Key encrypts data during transmission and other networks cannot see the content of
messages. The length is 16 bytes.
Adaptive Rate
Data rate can be adapted automatically by the network (AUTO) or can be adjusted in a fix value by the user
(OFF).
Data Rate
This parameter is the speed at data which is transferred. It can be adjusted by user if adaptive rate is configured
as OFF.
Depending on the region (EU868, US915, AU915, AS923, IN865, …) the data rate takes different values.
Table for EU868
DataRate
Configuration
Indicative physical bit rate [bit/s]
0
SF12 / 125kHz
250
1
SF11 / 125kHz
440
2
SF10 / 125kHz
980
3
SF9 / 125kHz
1760
4
SF8 / 125kHz
3125
5
SF7/125kHz
5470
6
SF7 / 250kHz
11000
7
FSK: 50kbps
50000
8..15
RFU