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Last modified by Xiaoling on 2025/04/23 15:57
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edited by Xiaoling
on 2022/06/01 18:07
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edited by Xiaoling
on 2022/05/23 10:44
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7 7  **RS485-BL – Waterproof RS485 to LoRaWAN Converter User Manual**
8 8  
9 9  
10 -
11 11  **Table of Contents:**
12 12  
13 -{{toc/}}
14 14  
15 15  
16 16  
17 17  
18 -
19 19  = 1.Introduction =
20 20  
21 21  == 1.1 What is RS485-BL RS485 to LoRaWAN Converter ==
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25 25  )))
26 26  
27 27  (((
28 -The Dragino RS485-BL is a (% style="color:blue" %)**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.
25 +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.
29 29  )))
30 30  
31 31  (((
32 -RS485-BL can interface to RS485 sensor, 3.3v/5v UART sensor or interrupt sensor. RS485-BL provides (% style="color:blue" %)**a 3.3v output**(%%) and** (% style="color:blue" %)a 5v output(%%)** to power external sensors. Both output voltages are controllable to minimize the total system power consumption.
29 +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.
33 33  )))
34 34  
35 35  (((
36 -RS485-BL is IP67 (% style="color:blue" %)**waterproof**(%%) and powered by (% style="color:blue" %)**8500mAh Li-SOCI2 battery**(%%), it is designed for long term use for several years.
33 +RS485-BL is IP67 **waterproof** and powered by **8500mAh Li-SOCI2 battery**, it is designed for long term use for several years.
37 37  )))
38 38  
39 39  (((
40 -RS485-BL runs standard (% style="color:blue" %)**LoRaWAN 1.0.3 in Class A**(%%). It can reach long transfer range and easy to integrate with LoRaWAN compatible gateway and IoT server.
37 +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.
41 41  )))
42 42  
43 43  (((
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54 54  
55 55  [[image:1652953304999-717.png||height="424" width="733"]]
56 56  
57 -
58 -
59 59  == 1.2 Specifications ==
60 60  
61 -
62 62  **Hardware System:**
63 63  
64 64  * STM32L072CZT6 MCU
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65 65  * SX1276/78 Wireless Chip 
66 66  * Power Consumption (exclude RS485 device):
67 67  ** Idle: 6uA@3.3v
62 +
63 +*
68 68  ** 20dB Transmit: 130mA@3.3v
69 69  
70 -
71 71  **Interface for Model:**
72 72  
73 73  * 1 x RS485 Interface
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77 77  * 1 x Interrupt Interface
78 78  * 1 x Controllable 5V output, max
79 79  
80 -
81 81  **LoRa Spec:**
82 82  
83 83  * Frequency Range:
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96 96  * 127 dB Dynamic Range RSSI.
97 97  * Automatic RF Sense and CAD with ultra-fast AFC. ​​​
98 98  
99 -
100 100  == 1.3 Features ==
101 101  
102 102  * LoRaWAN Class A & Class C protocol (default Class A)
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108 108  * Support Modbus protocol
109 109  * Support Interrupt uplink
110 110  
111 -
112 112  == 1.4 Applications ==
113 113  
114 114  * Smart Buildings & Home Automation
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118 118  * Smart Cities
119 119  * Smart Factory
120 120  
121 -
122 122  == 1.5 Firmware Change log ==
123 123  
124 124  [[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);"]]
125 125  
126 -
127 127  == 1.6 Hardware Change log ==
128 128  
129 129  (((
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150 150  
151 151  (((
152 152  Release version ​​​​​
153 -
154 -
155 155  )))
156 156  
157 157  = 2. Pin mapping and Power ON Device =
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165 165  
166 166  The Left TXD and RXD are TTL interface for external sensor. TTL level is controlled by 3.3/5v Jumper.
167 167  
168 -
169 169  = 3. Operation Mode =
170 170  
171 171  == 3.1 How it works? ==
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172 172  
173 173  (((
174 174  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.
175 -
176 -
177 177  )))
178 178  
179 179  == 3.2 Example to join LoRaWAN network ==
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237 237  == 3.3 Configure Commands to read data ==
238 238  
239 239  (((
240 -There are plenty of RS485 and TTL level devices in the market and each device has different command to read the valid data. To support these devices in flexible, RS485-BL supports flexible command set. User can use [[AT Commands or LoRaWAN Downlink>>||anchor="H3.5ConfigureRS485-BLviaATorDownlink"]] Command to configure how RS485-BL should read the sensor and how to handle the return from RS485 or TTL sensors.
241 -
242 -
225 +There are plenty of RS485 and TTL level devices in the market and each device has different command to read the valid data. To support these devices in flexible, RS485-BL supports flexible command set. User can use [[AT Commands or LoRaWAN Downlink>>path:#AT_COMMAND]] Command to configure how RS485-BL should read the sensor and how to handle the return from RS485 or TTL sensors.
243 243  )))
244 244  
245 245  === 3.3.1 onfigure UART settings for RS485 or TTL communication ===
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626 626  
627 627  [[image:1653273818896-432.png]]
628 628  
629 -(((
630 630  AT+INTMOD=0  Disable Interrupt
631 -)))
632 632  
633 -(((
634 634  AT+INTMOD=1  Interrupt trigger by rising or falling edge.
635 -)))
636 636  
637 -(((
638 638  AT+INTMOD=2  Interrupt trigger by falling edge. ( Default Value)
639 -)))
640 640  
641 -(((
642 642  AT+INTMOD=3  Interrupt trigger by rising edge.
643 -)))
644 644  
645 645  == 3.4 Uplink Payload ==
646 646  
647 -(% border="1" style="background-color:#4f81bd; color:white; width:850px" %)
648 -|**Size(bytes)**|(% style="width:130px" %)**2**|(% style="width:93px" %)**1**|(% style="width:509px" %)**Length depends on the return from the commands**
649 -|Value|(% style="width:130px" %)(((
650 -(((
622 +|**Size(bytes)**|**2**|**1**|**Length depends on the return from the commands**
623 +|Value|(((
651 651  Battery(mV)
652 -)))
653 653  
654 -(((
655 655  &
656 -)))
657 657  
658 -(((
659 659  Interrupt _Flag
660 -)))
661 -)))|(% style="width:93px" %)(((
629 +)))|(((
662 662  PAYLOAD_VER
663 663  
664 664  
665 -)))|(% style="width:509px" %)If the valid payload is too long and exceed the maximum support payload length in server, server will show payload not provided in the LoRaWAN server.
633 +)))|If the valid payload is too long and exceed the maximum support payload length in server, server will show payload not provided in the LoRaWAN server.
666 666  
667 667  Below is the decoder for the first 3 bytes. The rest bytes are dynamic depends on different RS485 sensors.
668 668  
669 -(((
637 +
670 670  function Decoder(bytes, port) {
671 -)))
672 672  
673 -(((
674 674  ~/~/Payload Formats of RS485-BL Deceive
675 -)))
676 676  
677 -(((
678 678  return {
679 -)))
680 680  
681 -(((
682 682   ~/~/Battery,units:V
683 -)))
684 684  
685 -(((
686 686   BatV:((bytes[0]<<8 | bytes[1])&0x7fff)/1000,
687 -)))
688 688  
689 -(((
690 690   ~/~/GPIO_EXTI 
691 -)))
692 692  
693 -(((
694 694   EXTI_Trigger:(bytes[0] & 0x80)? "TRUE":"FALSE",
695 -)))
696 696  
697 -(((
698 698   ~/~/payload of version
699 -)))
700 700  
701 -(((
702 702   Pay_ver:bytes[2],
703 -)))
704 704  
705 -(((
706 706   };
707 -)))
708 708  
709 -(((
710 710   }
711 -)))
712 712  
713 -(((
660 +
661 +
662 +
663 +
664 +
665 +
714 714  TTN V3 uplink screen shot.
715 -)))
716 716  
717 -[[image:1653274001211-372.png||height="192" width="732"]]
668 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image023.png]]
718 718  
719 -== 3.5 Configure RS485-BL via AT or Downlink ==
670 +1.
671 +11. Configure RS485-BL via AT or Downlink
720 720  
721 721  User can configure RS485-BL via [[AT Commands >>path:#_​Using_the_AT]]or LoRaWAN Downlink Commands
722 722  
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