Last modified by Karry Zhuang on 2025/03/06 16:34
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From version < 19.1 >
edited by Xiaoling
on 2022/05/23 08:53
To version < 22.3 >
edited by Xiaoling
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... ... @@ -14,62 +14,44 @@
14 14  
15 15  = 1.Introduction =
16 16  
17 -== 1.1 What is RS485-BL RS485 to LoRaWAN Converter ==
17 +== 1.1 What is RS485-LN RS485 to LoRaWAN Converter ==
18 18  
19 19  (((
20 -
21 -)))
22 -
23 23  (((
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.
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.
25 25  )))
26 26  
27 27  (((
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.
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.
29 29  )))
30 30  
31 31  (((
32 -RS485-BL is IP67 **waterproof** and powered by **8500mAh Li-SOCI2 battery**, it is designed for long term use for several years.
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.
33 33  )))
34 34  
35 35  (((
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.
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.
37 37  )))
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.
41 41  )))
42 42  
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 -)))
37 +[[image:1653267211009-519.png||height="419" width="724"]]
46 46  
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 -
53 53  == 1.2 Specifications ==
54 54  
55 55  **Hardware System:**
56 56  
57 57  * STM32L072CZT6 MCU
58 -* SX1276/78 Wireless Chip 
44 +* SX1276/78 Wireless Chip
59 59  * Power Consumption (exclude RS485 device):
60 -** Idle: 6uA@3.3v
46 +** Idle: 32mA@12v
61 61  
62 62  *
63 -** 20dB Transmit: 130mA@3.3v
49 +** 20dB Transmit: 65mA@12v
64 64  
65 65  **Interface for Model:**
66 66  
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
53 +* RS485
54 +* Power Input 7~~ 24V DC.
73 73  
74 74  **LoRa Spec:**
75 75  
... ... @@ -78,27 +78,30 @@
78 78  ** Band 2 (LF): 410 ~~ 528 Mhz
79 79  * 168 dB maximum link budget.
80 80  * +20 dBm - 100 mW constant RF output vs.
63 +* +14 dBm high efficiency PA.
81 81  * Programmable bit rate up to 300 kbps.
82 82  * High sensitivity: down to -148 dBm.
83 83  * Bullet-proof front end: IIP3 = -12.5 dBm.
84 84  * Excellent blocking immunity.
68 +* Low RX current of 10.3 mA, 200 nA register retention.
85 85  * Fully integrated synthesizer with a resolution of 61 Hz.
86 -* LoRa modulation.
70 +* FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
87 87  * Built-in bit synchronizer for clock recovery.
88 88  * Preamble detection.
89 89  * 127 dB Dynamic Range RSSI.
90 -* 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.
91 91  
92 92  == 1.3 Features ==
93 93  
94 -* LoRaWAN Class A & Class C protocol (default Class A)
79 +* LoRaWAN Class A & Class C protocol (default Class C)
95 95  * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865/RU864
96 96  * AT Commands to change parameters
97 -* Remote configure parameters via LoRaWAN Downlink
82 +* Remote configure parameters via LoRa Downlink
98 98  * Firmware upgradable via program port
99 99  * Support multiply RS485 devices by flexible rules
100 100  * Support Modbus protocol
101 -* Support Interrupt uplink
86 +* Support Interrupt uplink (Since hardware version v1.2)
102 102  
103 103  == 1.4 Applications ==
104 104  
... ... @@ -111,53 +111,39 @@
111 111  
112 112  == 1.5 Firmware Change log ==
113 113  
114 -[[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/]]
115 115  
116 116  == 1.6 Hardware Change log ==
117 117  
118 118  (((
119 -v1.4
120 -)))
121 -
122 122  (((
123 -~1. Change Power IC to TPS22916
124 -)))
105 +v1.2: Add External Interrupt Pin.
125 125  
126 -
127 -(((
128 -v1.3
107 +v1.0: Release
129 129  )))
130 -
131 -(((
132 -~1. Change JP3 from KF350-8P to KF350-11P, Add one extra interface for I2C and one extra interface for one-wire
133 133  )))
134 134  
111 += 2. Power ON Device =
135 135  
136 136  (((
137 -v1.2
138 -)))
114 +The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
139 139  
116 +* Power Source VIN to RS485-LN VIN+
117 +* Power Source GND to RS485-LN VIN-
118 +
140 140  (((
141 -Release version ​​​​​
120 +Once there is power, the RS485-LN will be on.
142 142  )))
143 143  
144 -= 2. Pin mapping and Power ON Device =
145 -
146 -(((
147 -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.
123 +[[image:1653268091319-405.png]]
148 148  )))
149 149  
150 -[[image:1652953055962-143.png||height="387" width="728"]]
151 -
152 -
153 -The Left TXD and RXD are TTL interface for external sensor. TTL level is controlled by 3.3/5v Jumper.
154 -
155 155  = 3. Operation Mode =
156 156  
157 157  == 3.1 How it works? ==
158 158  
159 159  (((
160 -The RS485-BL is configured as LoRaWAN OTAA Class A mode by default. It has OTAA keys to join network. To connect a local LoRaWAN network, user just need to input the OTAA keys in the network server and power on the RS485-BL. It will auto join the network via OTAA.
131 +The RS485-LN is configured as LoRaWAN OTAA Class C mode by default. It has OTAA keys to join network. To connect a local LoRaWAN network, user just need to input the OTAA keys in the network server and power on the RS485-LN. It will auto join the network via OTAA.
161 161  )))
162 162  
163 163  == 3.2 Example to join LoRaWAN network ==
... ... @@ -164,27 +164,32 @@
164 164  
165 165  Here shows an example for how to join the TTN V3 Network. Below is the network structure, we use [[LG308>>url:http://www.dragino.com/products/lora-lorawan-gateway/item/140-lg308.html]] as LoRaWAN gateway here. 
166 166  
167 -[[image:1652953414711-647.png||height="337" width="723"]]
138 +[[image:1653268155545-638.png||height="334" width="724"]]
168 168  
169 169  (((
170 -The RS485-BL in this example connected to two RS485 devices for demonstration, user can connect to other RS485 devices via the same method.
171 -)))
141 +The RS485-LN in this example connected to two RS485 devices for demonstration, user can connect to other RS485 devices via the same method. The connection is as below:
172 172  
143 +485A+ and 485B- of the sensor are connected to RS485A and RA485B of RS485-LN respectively.
144 +
145 +[[image:1653268227651-549.png||height="592" width="720"]]
146 +
173 173  (((
174 -The LG308 is already set to connect to [[TTN V3 network >>url:https://www.thethingsnetwork.org/]]. So what we need to now is only configure the TTN V3:
148 +The LG308 is already set to connect to [[TTN V3 network >>path:eu1.cloud.thethings.network/]]. So what we need to now is only configure the TTN V3:
175 175  )))
176 176  
177 177  (((
178 -**Step 1**: Create a device in TTN V3 with the OTAA keys from RS485-BL.
152 +**Step 1**: Create a device in TTN V3 with the OTAA keys from RS485-LN.
179 179  )))
180 180  
181 181  (((
182 -Each RS485-BL is shipped with a sticker with unique device EUI:
156 +Each RS485-LN is shipped with a sticker with unique device EUI:
183 183  )))
158 +)))
184 184  
185 185  [[image:1652953462722-299.png]]
186 186  
187 187  (((
163 +(((
188 188  User can enter this key in their LoRaWAN Server portal. Below is TTN V3 screen shot:
189 189  )))
190 190  
... ... @@ -191,13 +191,11 @@
191 191  (((
192 192  Add APP EUI in the application.
193 193  )))
170 +)))
194 194  
195 -
196 -
197 -
198 198  [[image:image-20220519174512-1.png]]
199 199  
200 -[[image:image-20220519174512-2.png||height="328" width="731"]]
174 +[[image:image-20220519174512-2.png||height="323" width="720"]]
201 201  
202 202  [[image:image-20220519174512-3.png||height="556" width="724"]]
203 203  
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