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LoRa1278 Remote Spread Spectrum Wireless Transceiver Module
Product Description
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
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
| 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