UM401LPDataSheetV1.1_EN

UM401LP

LoRaWAN Compliant

RF Module with UART interface

UM401LP is a highly integrated low-power half-`duplex RF transceiver module embedding high-speed low-power MCU and high-performance RF chip with LORA modem which is capable of achieving significant longer range than existing RF transceiver based on FSK or OOK modulation. UM401LP support LoRaWAN class-A protocol.

This module uses LoRa modem to improve the sensitivity up to -137dBm, significantly extending the transmission distance under a low power. Under LoRaWAN protocol , the start network can solve the problem of collision and low power consumption through gateway solution.

UM401LP module’s interface voltage 2.6-3.6 V with consuming only 13 mA at the receiving mode. If there is no packet to transmit , the module consumption is only 1.3uA which is very suitable for a battery-powered system.

Using the UM401LP module in an application minimize the need or an expensive and time-consuming RF development. Fast time to market is possible with this pre-qualified module.

.

Apply

●Wireless water/heat/gas meter

reading

●Wireless sensor

●Intelligent instrument and meter

●Intelligent lighting control

●Auto data collection

●Remote control and sensing

●Smart building and security

●Robot control

●Power system monitoring

●Wireless warehousing, logistics

management Feature

●LoRaWAN class-A compliant

●Globally unique 64-bit identifier

●Four band and 16 channels support ●Transmission distance > 5000 m

●Frequency 410MHz to 510MHz

●High sensitivity -137dBm

●Maximum transmission power 20dBm ●Low sleep current 1.13uA

●Receiving mode current 13mA

●Super small size 34.5mm*20mm*6mm

Catalog

1. Module Overview (4)

2. LoRa Modulation Technique (5)

3. Global Electrical Characteristics (6)

4. Module Package (7)

4.1 Pin Definition (7)

4.2 Module Dimensions (8)

5. Typical Application Schematic (8)

8. Other (9)

8.1 Common Problem (9)

8.2 Contact (9)

1. Module Overview

The UM401LP is an ultra-long range,high-performance module for wireless communication. It operates in the license free frequency band .

The UM401LP uses Semtech’s patented LoRa modulation technique which combines Spread spectrum modulation and forward error correction techniques to increase the range and spectrum modulation and forward error correction techniques to increase the range and robustness of radio communication links compared with traditional FSK or OOK based modulation. Typically examples of UM401LP receive performances are given in the following table.

Signal Bandwidth/[kHz]Spreading Factor Sensitivity/[dBm]

1257-123

12512-138

2507-121

25012-135

5007-116

50012-130

The module is solderable like a SMD component and can easily be mounted on a simple carrier board with a minimum of required external connections.The wide range of capabilities pro vided by the iM880A can be tested by using the EVB borad from manthink and the software of LoRaWANConfiger.

2. LoRa Modulation Technique

The UM401LP uses Semtech’s LoRa proprietary spread spectrum modulation technique. This modulation, in contrast to conventional modulation techniques, permits an increase in link budget and increased immunity to in-band interference. LoRa also provides significant advantages in both blocking and selectivity, solving the traditional design compromise between range, interference immunity and energy consumption.

In LoRa mode the UM401LP offers 125 kHz bandwith with spreading factors ranging from 7 to 12. The spread spectrum LoRa modulation is performed by representing each bit of payload information by multiple chips of information. The rate at which the spread information is sent is referred to as the symbol rate (Rs), the ratio between the nominal symbol rate and chip rate is the spreading factor and represents the number of symbols sent per bit of information. The range of parameters which can be configured are given in the following tables.

Spreading Factor Chips/Symbol SNR/[dB]

7128-7.5

8256-10

9512-12.5

101024-15

112048-17.5

124096-20 Note that the spreading factor must be known in advance on both transmit and receive sides of the radio link as different spreading factors are orthogonal to each other. Note also the resulting signal to noise ratio (SNR) required at the receiver input. It is the capability to receive signals with negative SNR that increases the sensitivity, so link budget and range, of the LoRa receiver.

3. Global Electrical Characteristics

Radio Frequency 410~510M

Step Frequency 1KHz

Transmission Power 5~20dBm,

Receiving Sensitivity -138dBm@292bps

Air Transfer Rate 292bps~5.4Kbps

Interface Baud Rate 9600bps（+-3% Full temperature）Interface Detection Way 8N1/8E1/8O1

Interface Buffer Space Double 180Bytes

Working Humidity 10%～90% (no condensation) Working Temperature -45℃~85℃

The power Supply 2.6~ 3.6V

Transmission Current (typical) 120mA@100mW

Harmonic Suppression ≤1GHz：<-36dBm, ＞1GHz：< -30dBm

13mA

CAD/ Receives

Current(typical)

Sleep Current(typical) 1.13uA

Size 34.5mm x 20.0mm x 6.0mm

Antenna Impedance 50Ω

4. Module Package

4.1 Pin Definition

UM401LP module has nine pins, specific definitions as the following table:

Pin Name Direction State

1 GND - Ground，0V

2 VCC - 2.6~3.6V

3 SETA Input（weak pull-up）about 47kΩ pull-up resistor.

Reserved, Please keep it Floating

4 RXD Input（weak pull-up）Pull up resistors UART input port, the

TTL level, about 47kΩ

5 TXD output UART output, TTL level

6 AUX output Data input/output instruction

When Radio is transmitting or

receiving

Aux output a low level signal. Other

status, AUX keep in high level

7 SETB Input（strong pull-down）About 4.7kΩ pull-down resistor

Reserved, Please keep it Floating

8 NC - Grounding/dangling

9 NC - Grounding/dangling

4.2 Module Dimensions

5. Typical Application Schematic

6. Other

6.1 Common Problem

6.2 Contact

For more support, please contact with Beijing Manthink technology co., Ltd: Contact number ：+86-010-******** E-mail ：info@https://www.sodocs.net/doc/315868944.html,

Address ：Room601 Ronghua International Building No.5, Ronghua South Road No.10, Beijing

Economic-Technological Development Area (BDA)

No

Communication Between g Modules

1．Different parameters between two modules, such as: baud rate 2．Different radio frequency or air baud rate 3．Different product series

4．Abnormal power supply

5．Module Damaged 6．Module mode setting error

7．Out of communication range or incorrect antenna connection

Close Transmission Distance

1．Over voltage range 2．Too big power supply ripple

3．Incorrect antenna connection or type

4．Too closed between antenna and metal surface or too small area with module grounding

5．Terrible condition, such as dense buildings