4.4 Communication function
4.4.1 Wi-Fi communication function
4.4.1.1 Instructions for use
(1) The following settings are required in NRF51 in order that Wi-Fi communication is active.
Transmission interval: [2 seconds], [4 seconds], [10 seconds], [30 seconds] or [1 minute] (selectable)
Data format: [Type1], [Type2] or [Type3] (selectable)
Encryption: [WPA], [WPA2], [WEP] or [No encryption] (selectable)
Protocol: [UDP] or [TCP] (selectable)
IP address mode: [DHCP] or [Fixed address] (selectable)
*If “Fixed address” is selected, Local IP address, Subnet mask and Gateway settings are needed.
SSID: Up to 31 characters (see access point label)
Network key: Up to 32 characters (see access point label)
Host IP address: [0 to 255, 0 to 255, 0 to 255, 0 to 255] (IP address of server)
Port No.: 0 to 65535 (Opened port No. of server)
(2) Wi-Fi communication setting should be “ON” by user with Dosimeter Configuration Tool.
(3) When the setting is “ON”, NRF51 starts connection with cloud server via Wi-Fi access point. After
connection establishment, NRF51 sends telemetry data with selected transmission interval and data
format.
4.4.1.2 Specification
Operating time: More than 8 hours (New alkaline two batteries are used and transmission interval is
“10 seconds”)
*“Low battery voltage” alarm generates if Wi-Fi communication stops because of low battery in use.
When the alarm occurs, please exit from radiation controlled area immediately and replace the batteries
with new ones.
*Use of two batteries is recommended in order to keep stable communication status though NRF51
can be used by one battery.
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