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14	14
15	15	= 1.Introduction =
16	16
17		-== 1.1 What is RS485-LN RS485 to LoRaWAN Converter ==
	17	+== 1.1 What is RS485-BL RS485 to LoRaWAN Converter ==
18	18
19	19	(((
	20	+
	21	+)))
	22	+
20	20	(((
21		-The Dragino RS485-LN is a RS485 to LoRaWAN Converter. It converts the RS485 signal into LoRaWAN wireless signal which simplify the IoT installation and reduce the installation/maintaining cost.
	24	+The Dragino RS485-BL is a **RS485 / UART to LoRaWAN Converter** for Internet of Things solutions. User can connect RS485 or UART sensor to RS485-BL converter, and configure RS485-BL to periodically read sensor data and upload via LoRaWAN network to IoT server.
22	22	)))
23	23
24	24	(((
25		-RS485-LN allows user to monitor / control RS485 devices and reach extremely long ranges. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption. It targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, smartphone detection, building automation, and so on.
	28	+RS485-BL can interface to RS485 sensor, 3.3v/5v UART sensor or interrupt sensor. RS485-BL provides **a 3.3v output** and** a 5v output** to power external sensors. Both output voltages are controllable to minimize the total system power consumption.
26	26	)))
27	27
28	28	(((
29		-For data uplink, RS485-LN sends user-defined commands to RS485 devices and gets the return from the RS485 devices. RS485-LN will process these returns according to user-define rules to get the final payload and upload to LoRaWAN server.
	32	+RS485-BL is IP67 **waterproof** and powered by **8500mAh Li-SOCI2 battery**, it is designed for long term use for several years.
30	30	)))
31	31
32	32	(((
33		-For data downlink, RS485-LN runs in LoRaWAN Class C. When there downlink commands from LoRaWAN server, RS485-LN will forward the commands from LoRaWAN server to RS485 devices.
	36	+RS485-BL runs standard **LoRaWAN 1.0.3 in Class A**. It can reach long transfer range and easy to integrate with LoRaWAN compatible gateway and IoT server.
34	34	)))
	38	+
	39	+(((
	40	+For data uplink, RS485-BL sends user-defined commands to RS485 devices and gets the return from the RS485 devices. RS485-BL will process these returns data according to user-define rules to get the final payload and upload to LoRaWAN server.
35	35	)))
36	36
37		-[[image:1653267211009-519.png||height="419" width="724"]]
	43	+(((
	44	+For data downlink, RS485-BL runs in LoRaWAN Class A. When there is downlink commands from LoRaWAN server, RS485-BL will forward the commands from LoRaWAN server to RS485 devices.
	45	+)))
38	38
	47	+(((
	48	+Each RS485-BL pre-load with a set of unique keys for LoRaWAN registration, register these keys to LoRaWAN server and it will auto connect after power on.
	49	+)))
	50	+
	51	+[[image:1652953304999-717.png||height="424" width="733"]]
	52	+
39	39	== 1.2 Specifications ==
40	40
41	41	**Hardware System:**
42	42
43	43	* STM32L072CZT6 MCU
44		-* SX1276/78 Wireless Chip
	58	+* SX1276/78 Wireless Chip
45	45	* Power Consumption (exclude RS485 device):
46		-** Idle: 32mA@12v
	60	+** Idle: 6uA@3.3v
47	47
48	48	*
49		-** 20dB Transmit: 65mA@12v
	63	+** 20dB Transmit: 130mA@3.3v
50	50
51	51	**Interface for Model:**
52	52
53		-* RS485
54		-* Power Input 7~~ 24V DC.
	67	+* 1 x RS485 Interface
	68	+* 1 x TTL Serial , 3.3v or 5v.
	69	+* 1 x I2C Interface, 3.3v or 5v.
	70	+* 1 x one wire interface
	71	+* 1 x Interrupt Interface
	72	+* 1 x Controllable 5V output, max
55	55
56	56	**LoRa Spec:**
57	57
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60	60	** Band 2 (LF): 410 ~~ 528 Mhz
61	61	* 168 dB maximum link budget.
62	62	* +20 dBm - 100 mW constant RF output vs.
63		-* +14 dBm high efficiency PA.
64	64	* Programmable bit rate up to 300 kbps.
65	65	* High sensitivity: down to -148 dBm.
66	66	* Bullet-proof front end: IIP3 = -12.5 dBm.
67	67	* Excellent blocking immunity.
68		-* Low RX current of 10.3 mA, 200 nA register retention.
69	69	* Fully integrated synthesizer with a resolution of 61 Hz.
70		-* FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
	86	+* LoRa modulation.
71	71	* Built-in bit synchronizer for clock recovery.
72	72	* Preamble detection.
73	73	* 127 dB Dynamic Range RSSI.
74		-* Automatic RF Sense and CAD with ultra-fast AFC.
75		-* Packet engine up to 256 bytes with CRC.
	90	+* Automatic RF Sense and CAD with ultra-fast AFC. ​​​
76	76
77	77	== 1.3 Features ==
78	78

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