Browan TBAM100-915 User manual

Ambient light Sensor
Reference Manual
TBAM100-915
TBAM100-868

Table of Contents
1. Description 1
2. Specifications 2
2.1 Mechanical 2
2.1.1 Sensor 2
2.2 Environmental 2
2.3 Radio 2
2.4 Certifications and Conformity 2
2.5 Power 2
2.6 User Interface 2
2.7 Additional Features 2
3. Operation 3
3.1 Transport Mode 3
3.2 Default Operation 3
4. Messages 4
4.1 Payload 4
5. Command 4
1. Description
The Tabs Ambient Light Sensor utilizes
LoRaWAN connectivity to provide
measurements of ambient light intensity
which matches the human eye’s response
to light under a variety of lighting
conditions.
© 2019 Browan Communications Inc. All rights reserved.
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2. Specifications
2.1 Mechanical
2.1.1 Sensor
Length x Width x Height
50mm x 20mm x 50mm
Weight
30g without battery
40g with battery
Sensor
• Optical sensor
LTR-308ALS-WA16
• 16 to 20 bits
measurement resolution
• Wide dynamic range
(0.01 to 157K lux) with
linear response
2.2 Environmental
Temperature
0°C to +50°C
IP Rating
IP 50 equivalent
2.3 Radio
Frequency
• 863–870MHz for EU
• 902–928MHz for North
America
Tx Power
US: +19dBm
EU: +17dBm
Rx Sensitivity
-135dBm
Antenna Gain
-2dBi Peak, -5dBi Avg
2.4 Certifications and Conformity
FCC ID: pending
IC:
CE
ROHS REACH
2.5 Power
Source
3.6V 1⁄2 AA Li-SOCl2 1200mAh
battery
Maximum Voltage
3.6V
Minimum Voltage
3.1V
Current
TBD
2.6 User Interface
LEDs
One blue LED
2.7 Additional Features
PCB Temperature
Battery Monitoring
© 2019 Browan Communications Inc. All rights reserved.
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3. Operation
3.1 Transport Mode
They are shipped with a plastic battery isolation tab that must be removed to enable operation.
3.2 Default Operation
While in default operation the device will send a join request message after booting a minute.
After joining successfully, the device will detect the ambient light every 5 minutes.
●Keep-Alive
○5 minutes.
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4. Messages
4.1 Payload
Port
104
Payload Length
6 bytes
Bytes
0
1
2
3
4
5
Field
Status
Battery
Temp
Lux
Status
Sensors status
Bit [0]
Bit [1]
Bits [2:3]
Bit [4]
Bits [5:7]
1 - Darker, 0 - Lighter or Keep-Alive
1 - Lighter, 0 - Darker or Keep-Alive
RFU
1 - Keep-Alive, 0 - Status Change
RFU
Battery
Battery level
Bits [3:0]
Bits [7:4]
unsigned value ν, range 1 – 14;
battery voltage in V = (25 + ν) ÷ 10.
RFU
Temp
Temperature as measured by on-board NTC
Bits [6:0]
Bit [7]
unsigned value τ, range 0 – 127;
temperature in °C = τ - 32.
measurement range -32 to 95°C
RFU
Lux
Lux data
Bits [23:0]
unsigned value 𝛿.
Lux = 𝛿 ÷ 100.
*Note: little-endian format.
5. Command
RESERVED.
© 2019 Browan Communications Inc. All rights reserved.
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