Rejeee SL700 Series User manual

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SL700 Air Pressure Sensor(E-paper)
LoRaWAN Air Pressure Sensor V1.0
Address: No. 20,Xinghuo Road, Jiangbei District, Nanjing, China
Email: [email protected]
Tel: [phone]
Web: http://www.rejeee.com
User Manual for SL700 Series(E-Paper)
Jiangsu Rejeee Intelligent Technology Co., Ltd

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SL700 is long range low power air pressure sensor based on Semtech SX1262/SX1268.
Sensor Type Product Number
Built-in SHT30，2.9-inch E-Paper SL700CN, SL700EU,SL700US,SL700AS
High Sensitivity Sensor
2.9-inch Screen Local Display
Type-C for Local Configuration
Internal Battery Up to 5 Years
LoRa SX1262/SX1268, Long Range Low Power
1. General Information
1.1 Main features:
1.2 Details

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Parameters FeatureParameters Feature
CPU STM32L151
Wireless LoRaWAN(SX1262/SX1268)
Encryption AES128
Battery Built-in Li-battery (Changeable, and No Recharge)
Battery Capacity 4800mAh
E-Paper Temperature 0℃~+ 50℃
Air pressure range 300～1250hPa(-40℃～85℃)
Sensor Temperature -45℃~+ 85℃
Sensor Humidity 0 ~100 %RH
Communication Half duplex
Accuracy Temperature : ±0.3℃
Humidity：±3%RH
Lifespan 5 Years(Every 30 Minutes for data uploading)
Data Speed 300bps-62.5k bps
Size 102mm*60mm*25mm
TX Power 22dBm Max
RX Sensitivity -140 dBm
Frequency SX1268: CN470
SX1262: EU868 / US915 / AS923
1.3 Size: 102mm*60mm*25mm

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1.4 Installation

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Make sure antenna is installed before turn on the device.
When you get the device, it is off, and on the screen, you can find the device EUI as below, the QR on the screen
is Rejeee website. Just press the button for more than 3 seconds, then you can turn on the device. If you want to
turn off the device, just press the button 3 seconds. You can change the QR code on the screen to your own
2. User Guide
2.1 Turn on/off the device

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website QR code: SensorTool Manual.
The device screen is 2.9-inch low power e-paper, when turn on the device, you can find information displaying on
the screen as below, you can change the logo as you like. SensorTool Manual.
There is one USB-C port as below, which is for power on and config, connect device to laptop with a USB-C cable,
and you can config the device, make sure to install CH34x USB driver and here is the link for driver: USB-to-Serial
Driver.
2.2 Information display on screen
2.3 USB-C Configuration

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When turn on the device, it will send data immediately, also you can press the button a short time(0.1 seconds),
then the device will also send data. Normally when you get the device from factory, the reset time for data
sending is every 30 mins, and if you want to change the time, you can connect the device to computer for config,
here there is instruction about the time configuration.SensorTool Manual.
LoRaWAN Network Structure
SL101 temperature and humidity sensor is based on standard LoRaWAN Class A, so you can connect to any
LoRaWAN network as below through OTAA: On the back of device, you can find information as below, with this
information, you can connect to any LoRaWAN server.
Connecting to The Things Network, please make sure choose manually connect and OTAA as below:
Sensor LoRaWAN
3. Data Uploading
4. Connect to LoRaWAN Network

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Sensor LoRaWAN
SL100CN
SL100EU
SL100US
SL100AS
4.1 Set ID and Key

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Data analysis example for JavaScript:
function decodeUplink(input) {
var obj = {};
var warnings = [];
obj.battery = (input.bytes[1]&0x1F);
obj.vol = (input.bytes[2]);
obj.temperature = (((input.bytes[4] & 0x80 ? input.bytes[4] - 0x100 : input.bytes[4]) << 8)
+
input.bytes[5]) / 10;
obj.humidity = input.bytes[7];
if (obj.temperature < -10) {
warnings.push("it's cold");
}
return {
data: obj,
warnings: warnings
};
}
LoRaWAN Format:
Picture as below, FRMPayload is sensor data.
5. Wireless LoraWAN Sensor Data Format

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Type Value Value Value
1 Byte 3 bit 5bit 1 Byte
0x00 Version Battery Level Reserve
Type
1 Byte
Value
2 Bytes Comments
0x04 Temperature
2-byte signed integer with
negative value below zero
The default unit is 0.1 degrees,
that is 201 means 20.1 degrees
e.g. 0xFF88 is -120 (-12℃), Network byte order mode is {04 FF 88}
Type
1 Byte
Value
1 Byte Comments
0x05 Humidity
Unsigned integer of 1 byte.
The default unit is 1%RH, that is
10 means 10%RH
6. Sensor Data Definition
6.1 Device Information(0x00)
6.2 Temperature(0x04)
6.3 Humidity(0x05)
6.4 Air Pressure（0x07）

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Type
1 Byte
Value
4 Bytes Comments
0x07 Air Pressure 4-byte signed integer. The default
unit is PA
Note: Factory reset data uploading is every 10 mins, customers can change data uploading frequency as below:
Connect sensor with a USB-C cable to computer for local configuration, through local configuration, you can
change the packet frequency. Refer SensorTool Manual.
7. Local Configuration: