DL-RTS1278M-868, 868MHz Wireless Transparent Transmission LoRa Module with SX1278 Chip and UART Serial Port

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Wireless transparent transmission LoRa Module (SX1278 Chip) with UART Serial Port

Model:DL-RTS1278M-868
Frequency:868Mhz
Chip:SX1278
Voltage:2.1~3.6V
Distance:3000m
Size:32*18*2mm

ÜRÜN BİLGİSİ

Wireless Transparent Transmission LoRa Module (SX1278 Chip) with UART Serial Port:

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. DL-RTS1278M 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 DL-RTS1278M 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

Serial number	parameter name	Parameter value details
1	Module size	18.3 * 32.3mm (without antenna)
2	Device source	All imported components, origin: Japan, the United States, Germany
3	Production Process	SMT lead-free process, AOI automatic testing, in line with environmental certification standards
4	Interface method	1 * 7 * 2.54mm, universal board and Dupont wire can be used
5	Working frequency	Default 434.125MHz, other frequencies can be customized 470-510MHz, 855-885MHz, 900-930MHz
6	Frequency step	1KHz setting step
7	Modulation	LoRa spread spectrum modulation
8	Transmit power	100mW@3.3V (0-7, 8 levels adjustable, each level increases by 3dBm, maximum 100mW
9	Receive sensitivity	-132dBm@0.81Kbps, -118.5dBm@18.23K bps
10	Air transmission rate (Occupied bandwidth)	0.81K / (BW125K), 1.46K / (BW125K), 2.6K / (BW125K) 4.56K / (BW125K), 9.11K / (BW250K), 18.23K / (BW500K)
11	Interface rate	1200 – 115200bps
12	Interface verification method	8N1 / 8E1 / 8O1
13	Interface buffer space	Double 256Bytes
14	power supply	2.1 ~ 3.6V
15	Emitting current (typical value)	100mA @ 100mW
16	Continuous receiving current	13mA@4.56Kbps, 15mA@18.23Kbps @reception rate (typical value)
17	Sleep current	2.5uA@3.3V (typical value), maximum 4.0uA
18	Transmission distance	3000 meters@0.81Kbps, 2000 meters@9.11K bps (open distance visible)
19	Antenna port impedance	50 ohm
20	Operating temperature	-40 ~ + 85 ℃
21	Working humidity	10% ~ 90% relative humidity, no condensation

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PIN DEFINITION

The DL-RTS1278M module has 9 pins, the specific definition is as follows:

Pin number	Pin name	Pin direction	Pin usage
1	GND	-	Ground 0V
2	VCC	-	2.1 ~ 3.6V
3	SET_A	Input (with weak pull-up)	Parameter setting A, pull-up resistor is about 47K
4	RXD	Input (with weak pull-up)	UART input port, TTL level, pull-up resistor is about 47K
5	TXD	Output	Output UART output port, TTL level
6	AUX	Output	Data input and output instructions
7	SET_B	Input (very weak pull-up)	Parameter setting B, pull-up resistance is about 10M
8	NC	-	Ground or floating
9	NC	-	Ground or floating