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41	41	**Hardware System:**
42	42
43	43	* STM32L072CZT6 MCU
44		-* SX1276/78 Wireless Chip
	44	+* SX1276/78 Wireless Chip
45	45	* Power Consumption (exclude RS485 device):
46		-** Idle: 6uA@3.3v
	46	+** Idle: 32mA@12v
47	47
48	48	*
49		-** 20dB Transmit: 130mA@3.3v
	49	+** 20dB Transmit: 65mA@12v
50	50
51	51	**Interface for Model:**
52	52
53		-* 1 x RS485 Interface
54		-* 1 x TTL Serial , 3.3v or 5v.
55		-* 1 x I2C Interface, 3.3v or 5v.
56		-* 1 x one wire interface
57		-* 1 x Interrupt Interface
58		-* 1 x Controllable 5V output, max
	53	+* RS485
	54	+* Power Input 7~~ 24V DC.
59	59
60	60	**LoRa Spec:**
61	61
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64	64	** Band 2 (LF): 410 ~~ 528 Mhz
65	65	* 168 dB maximum link budget.
66	66	* +20 dBm - 100 mW constant RF output vs.
	63	+* +14 dBm high efficiency PA.
67	67	* Programmable bit rate up to 300 kbps.
68	68	* High sensitivity: down to -148 dBm.
69	69	* Bullet-proof front end: IIP3 = -12.5 dBm.
70	70	* Excellent blocking immunity.
	68	+* Low RX current of 10.3 mA, 200 nA register retention.
71	71	* Fully integrated synthesizer with a resolution of 61 Hz.
72		-* LoRa modulation.
	70	+* FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
73	73	* Built-in bit synchronizer for clock recovery.
74	74	* Preamble detection.
75	75	* 127 dB Dynamic Range RSSI.
76		-* Automatic RF Sense and CAD with ultra-fast AFC. ​​​
	74	+* Automatic RF Sense and CAD with ultra-fast AFC.
	75	+* Packet engine up to 256 bytes with CRC.
77	77
78	78	== 1.3 Features ==
79	79
80		-* LoRaWAN Class A & Class C protocol (default Class A)
	79	+* LoRaWAN Class A & Class C protocol (default Class C)
81	81	* Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865/RU864
82	82	* AT Commands to change parameters
83		-* Remote configure parameters via LoRaWAN Downlink
	82	+* Remote configure parameters via LoRa Downlink
84	84	* Firmware upgradable via program port
85	85	* Support multiply RS485 devices by flexible rules
86	86	* Support Modbus protocol
87		-* Support Interrupt uplink
	86	+* Support Interrupt uplink (Since hardware version v1.2)
88	88
89	89	== 1.4 Applications ==
90	90
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97	97
98	98	== 1.5 Firmware Change log ==
99	99
100		-[[RS485-BL Image files – Download link and Change log>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/RS485-BL/Firmware/||style="background-color: rgb(255, 255, 255);"]]
	99	+[[RS485-LN Image files – Download link and Change log>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/]]
101	101
102	102	== 1.6 Hardware Change log ==
103	103
104	104	(((
105		-v1.4
106		-)))
107		-
108	108	(((
109		-~1. Change Power IC to TPS22916
110		-)))
	105	+v1.2: Add External Interrupt Pin.
111	111
112		-
113		-(((
114		-v1.3
	107	+v1.0: Release
115	115	)))
116		-
117		-(((
118		-~1. Change JP3 from KF350-8P to KF350-11P, Add one extra interface for I2C and one extra interface for one-wire
119	119	)))
120	120
	111	+= 2. Power ON Device =
121	121
122	122	(((
123		-v1.2
124		-)))
	114	+The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
125	125
126		-(((
127		-Release version ​​​​​
128		-)))
	116	+* Power Source VIN to RS485-LN VIN+
	117	+* Power Source GND to RS485-LN VIN-
129	129
130		-= 2. Pin mapping and Power ON Device =
	119	+Once there is power, the RS485-LN will be on.
131	131
132		-(((
133		-The RS485-BL is powered on by 8500mAh battery. To save battery life, RS485-BL is shipped with power off. User can put the jumper to power on RS485-BL.
	121	+[[image:1653268091319-405.png]]
134	134	)))
135	135
136		-[[image:1652953055962-143.png||height="387" width="728"]]
137		-
138		-
139		-The Left TXD and RXD are TTL interface for external sensor. TTL level is controlled by 3.3/5v Jumper.
140		-
141	141	= 3. Operation Mode =
142	142
143	143	== 3.1 How it works? ==

1653268091319-405.png

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