Wireless LoRa Module with SX1278 Chip and UART Transparent TransmissionDL-RTS1278M is a high-performance ...    More ...

Wireless LoRa Module with SX1278 Chip and UART Transparent Transmission




DL-RTS1278M is a high-performance wireless serial port LoRa module developed by DreamLnk for wireless meter reading and industrial remote control, it was embedded with high-speed low-power MCU and high-performance spread-spectrum RF chip SX1278, with LoRa spread-spectrum technology, while using efficient cyclic interleaving error correction coding, anti-interference and sensitivity are at the most advanced level in the industry. 


This LoRa Module provides multiple channel selections, and can online modify the serial port rate, transceiver frequency, transmit power, RF rate and other parameters. The default frequency is 434.125MHz. The working voltage of this RF module is 2.1-3.6V, and only consumes 13mA in the receiving state. 


DL-RTS1278M has four working modes, which can be arbitrarily switched between the modes. In the 1SEC cycle polling wake-up power saving mode (Polling mode), the reception consumes only tens of microamps, a section of lithium at 3.6V / 3.6AH. The sub-battery can work for several years and is very suitable for battery-powered systems.




Features:




● 3000 meters transmission distance (0.81Kbps)
● Working frequency 433MHz, 470MHz, 868MHz, 915MHz optional
● -132dBm = 810bps ultra-high sensitivity
● Maximum 100mW transmit power
● LoRa spread spectrum modulation
● Zero waiting to wake up, with air wake up function
● Efficient cyclic interleaving error correction coding
● Four working modes, standby current 2.5uA




Applications


● Wireless automatic meter reading
● Extremely long distance data communication
● Wireless sensor network
● Industrial automation data collection
● Field data remote control and telemetry
● Various transmitters, flowmeter intelligent instruments
● Building automation and security
● Monitoring and control of mine petroleum equipment
● Environment, energy saving, temperature monitoring
● Intelligent transportation, intelligent power
● Intelligent robot


Technical Parameter


NoNameParameters
1Module size18.3 * 32.3mm (without antenna)
2Device sourceAll imported components, origin: Japan, the United States, Germany
3Production ProcessSMT lead-free process, AOI automatic testing, in line with environmental certification standards
4Interface method1 * 7 * 2.54mm, universal board and Dupont wire can be used
5Working frequencyDefault 434.125MHz, other frequencies can be customized 470-510MHz, 855-885MHz, 900-930MHz
6Frequency step1KHz setting step
7ModulationLoRa spread spectrum modulation
8Transmit power100mW=3.3V (0-7, 8 levels adjustable, each level increases by 3dBm, maximum 100mW
9Receive sensitivity-132dBm=0.81Kbps, -118.5dBm=18.23K bps
10Air transmission rate
(Occupied bandwidth)
0.81K / (BW125K), 1.46K / (BW125K), 2.6K / (BW125K)
4.56K / (BW125K), 9.11K / (BW250K), 18.23K / (BW500K)

11Interface rate1200 – 115200bps
12Interface verification method8N1 / 8E1 / 8O1
13Interface buffer spaceDouble 256Bytes
14power supply2.1 ~ 3.6V
15Emitting current (typical value)100mA = 100mW
16Continuous receiving current13mA=4.56Kbps, 15mA=18.23Kbps in reception rate (typical value)
17Sleep current2.5uA=3.3V (typical value), maximum 4.0uA
18Transmission distance3000 meters=0.81Kbps, 2000 meters=9.11K bps (open distance visible)
19Antenna port impedance50 ohm
20Operating temperature-40 ~ + 85 ℃
21Working humidity10% ~ 90% relative humidity, no condensation


The DL-RTS1278M module has 9 pins, the specific definition is as follows:
PinPin namePin directionPin usage
1GND-Ground 0V
2VCC-2.1 ~ 3.6V
3SET_AInput (with weak pull-up)Parameter setting A, pull-up resistor is about 47K
4RXDInput (with weak pull-up)UART input port, TTL level, pull-up resistor is about 47K
5TXDOutputOutput UART output port, TTL level
6AUXOutputData input and output instructions
7SET_BInput (very weak pull-up)Parameter setting B, pull-up resistance is about 10M
8NC-Ground or floating
9NC-Ground or floating

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