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LoRa1278 Remote Spread Spectrum Wireless Transceiver Module

DL-RTS1278 transceiver module feature the LoRa long range modem that provides ultra‐long range spread spectrum communication and high interference immunity.

  • DL-RTS1278
  • 433/470/868/915 MHz
  • sx1278/sx1276
  • -1dBm
  • 1.8~3.7V
  • -139dBm @Lora
  • 3000m
  • 23.3 * 13.9*2mm
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LoRa1278 Spread Spectrum Wireless RF Transceiver Module


DL-RTS1278 LoRa transceiver module feature the LoRa's long range modem that provides ultra‐long range spread spectrum communication and high interference immunity whilst minimizing current consumption. LoRa1276/1278 wireless RF module adopts the SX1276/1278 chip from Semtech, which uses LoRa spread spectrum modulation frequency hopping technology.

Its communication distance and receiving sensitivity are far beyond the current FSK, GFSK modulation, and multiple transmitted signals in the same channel will not be affected by each other, it has super anti-interference. This module is designed with an output power of 100mw, and it is compact in size, which is widely used in industries such as wireless meter reading and remote industrial control.


Features

● Frequency range: 433/470/868/915 MHz (137-1020 MHZ can be customized)

● Sensitivity up to -139dBm @Lora

● Maximum output power: 20 dBm

● Low receiving current: 10.3 mA

● Standby current <200 nA

● Data transmission rate: @FSK, 1.2-300 Kbps; @Lora TM, 0.018-37.5 Kbps

● Lora TM, FSK, GFSK and OOK modulation modes

● Built-in antenna electrostatic protection

● 127 dB dynamic range RSSI

● 256 bytes FIFO and CRC frequency hopping function

● Built-in temperature sensor and low battery indicator

● Signal is not blocked

● Operating temperature range: -40 ~ +85 °C


Typical application

● ISM band data communication 

● Home security

● Wireless remote control

● Wireless sensor network

● Remote meter reading 

● Energy control and management

● Building Automation 

● AMR

● Smart buildings


Download Center

DL-RTS1278M Specification V1.0 do


Technical Parameter

Parameter

Min

Typical Max Unit Conditions
Operating conditions
Working voltage range 1.8 3.3 3.7  V

-40
85
Current consumption
Receive current
10.8 
mA
Emission current
120
mA @20dBm
Standby current
<0.2 
uA
RF parameters
Frequency Range 403 433 463 MHz @433MHz
470 490 510
MHz @470MHZ
800 868 900 MHz @868MHZ
900 915 100 MHz @915MHZ
Modulation frequency 1.2
300 Kbps FSK
0.018
37.5 Kbps LoraTM
Transmit power range 18.5
21 dBm
Receive sensitivity
-123 
dBm

@FSKdata=1.5kbps,Fdev=10kHZ


-139
dBm

@LoraBW=125KHz_SF=12_CR=4/5

Note: Please refer to the chip register setting instructions; To ensure that the PAof the module is turned on, so as to work at the maximum power, the highest bit ‘PaSelect’ of the 0x09 register must be set to 1.


Rate comparison table

Singnal Band Width Spreading Factor  Sensitivity (dbm)  Actual Band Rate (pbs)
62.5KHz SF=7 -126 2169
62.5KHz SF=8 -129 1187
62.5KHz SF=9 -132 656
62.5KHz SF=10 -135 296
62.5KHz SF=11 -137 164
62.5KHz SF=12 -139 91
125KHz SF=7 -123 4339
125KHz SF=8 -126 2375
125KHz SF=9 -129 1312
125KHz SF=10 -132 733
125KHz SF=11 -133 328
125KHz SF=12 -136 183
250KHz  SF=7 -120 8676
250KHz  SF=8 -123 4750
250KHz  SF=9 -125 2624
250KHz  SF=10 -128 1466
250KHz  SF=11 -130 778
250KHz  SF=12 -133 366
500KHz SF=7 -118 17353
500KHz SF=8 -121 9501
500KHz SF=9 -124 5249
500KHz SF=10 -127 2932
500KHz SF=11 -129 1557
500KHz SF=12 -130 830


Pin Definitions

LORA1278_02

No Definitions Description
1 GND Connect to power ground
2 MISO SPI Master Input Slave Output
3 MOSI  SPI Master Output Slave Input
4 SCK SPI Serial Clock input
5 NSS SPI Chip Select input
6 NRESET Reset trigger input
7 DIO5 Value I/0, can be defined by yourself
8 GND Connect to power ground
9 RF_ANT Antenna
10
GND Connect to power ground
11 DIO3 Value I/0, can be defined by yourself
12 DIO4 Value I/0, can be defined by yourself
13 VDD33 Power Supply
14 DIO0 Value I/0, can be defined by yourself
15 DIO1 Value I/0, can be defined by yourself
16 DIO2 Value I/0, can be defined by yourself


Size

LORA1278_01

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