Wiki source code of RS485-BL – Waterproof RS485 to LoRaWAN Converter

Version 32.9 by Xiaoling on 2022/06/02 09:46

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3.2	1	(% style="text-align:center" %)
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1.1	3
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2.2	7	RS485-BL – Waterproof RS485 to LoRaWAN Converter User Manual
1.1	8
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29.4	10
3.2	11	Table of Contents:
1.1	12
29.5	13	{{toc/}}
1.1	14
	15
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	17
29.4	18
3.2	19	= 1.Introduction =
1.1	20
3.2	21	== 1.1 What is RS485-BL RS485 to LoRaWAN Converter ==
1.1	22
3.2	23	(((
	24
	25	)))
1.1	26
3.2	27	(((
29.15	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.
3.2	29	)))
2.2	30
3.2	31	(((
29.15	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.
3.2	33	)))
2.2	34
3.2	35	(((
29.15	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.
3.2	37	)))
2.2	38
3.2	39	(((
29.15	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.
3.2	41	)))
2.2	42
3.2	43	(((
2.2	44	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.
3.2	45	)))
2.2	46
3.2	47	(((
2.2	48	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.
3.2	49	)))
2.2	50
3.2	51	(((
2.2	52	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.
3.2	53	)))
2.2	54
6.2	55	[[image:1652953304999-717.png\|\|height="424" width="733"]]
2.2	56
29.14	57
	58
3.2	59	== 1.2 Specifications ==
2.2	60
29.17	61
2.2	62	Hardware System:
	63
	64	* STM32L072CZT6 MCU
6.2	65	* SX1276/78 Wireless Chip
2.2	66	* Power Consumption (exclude RS485 device):
	67	** Idle: 6uA@3.3v
	68	** 20dB Transmit: 130mA@3.3v
	69
	70	Interface for Model:
	71
	72	* 1 x RS485 Interface
	73	* 1 x TTL Serial , 3.3v or 5v.
	74	* 1 x I2C Interface, 3.3v or 5v.
	75	* 1 x one wire interface
	76	* 1 x Interrupt Interface
	77	* 1 x Controllable 5V output, max
	78
	79	LoRa Spec:
	80
	81	* Frequency Range:
	82	** Band 1 (HF): 862 ~~ 1020 Mhz
	83	** Band 2 (LF): 410 ~~ 528 Mhz
	84	* 168 dB maximum link budget.
	85	* +20 dBm - 100 mW constant RF output vs.
	86	* Programmable bit rate up to 300 kbps.
	87	* High sensitivity: down to -148 dBm.
	88	* Bullet-proof front end: IIP3 = -12.5 dBm.
	89	* Excellent blocking immunity.
	90	* Fully integrated synthesizer with a resolution of 61 Hz.
	91	* LoRa modulation.
	92	* Built-in bit synchronizer for clock recovery.
	93	* Preamble detection.
	94	* 127 dB Dynamic Range RSSI.
3.3	95	* Automatic RF Sense and CAD with ultra-fast AFC.
2.2	96
3.3	97	== 1.3 Features ==
2.2	98
	99	* LoRaWAN Class A & Class C protocol (default Class A)
	100	* Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865/RU864
	101	* AT Commands to change parameters
	102	* Remote configure parameters via LoRaWAN Downlink
	103	* Firmware upgradable via program port
	104	* Support multiply RS485 devices by flexible rules
	105	* Support Modbus protocol
	106	* Support Interrupt uplink
	107
3.3	108	== 1.4 Applications ==
2.2	109
	110	* Smart Buildings & Home Automation
	111	* Logistics and Supply Chain Management
	112	* Smart Metering
	113	* Smart Agriculture
	114	* Smart Cities
	115	* Smart Factory
	116
6.2	117	== 1.5 Firmware Change log ==
2.2	118
4.2	119	[[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);"]]
2.2	120
29.10	121
4.2	122	== 1.6 Hardware Change log ==
2.2	123
4.2	124	(((
29.18	125
	126
2.2	127	v1.4
4.2	128	)))
2.2	129
4.2	130	(((
2.2	131	~1. Change Power IC to TPS22916
4.2	132	)))
2.2	133
	134
4.2	135	(((
2.2	136	v1.3
4.2	137	)))
2.2	138
4.2	139	(((
2.2	140	~1. Change JP3 from KF350-8P to KF350-11P, Add one extra interface for I2C and one extra interface for one-wire
4.2	141	)))
2.2	142
	143
4.2	144	(((
2.2	145	v1.2
4.2	146	)))
2.2	147
4.2	148	(((
	149	Release version
29.9	150
	151
4.2	152	)))
2.2	153
4.2	154	= 2. Pin mapping and Power ON Device =
2.2	155
6.2	156	(((
2.2	157	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.
6.2	158	)))
2.2	159
4.2	160	[[image:1652953055962-143.png\|\|height="387" width="728"]]
2.2	161
	162
	163	The Left TXD and RXD are TTL interface for external sensor. TTL level is controlled by 3.3/5v Jumper.
	164
29.8	165
6.2	166	= 3. Operation Mode =
2.2	167
6.2	168	== 3.1 How it works? ==
2.2	169
7.2	170	(((
2.2	171	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.
29.7	172
	173
7.2	174	)))
2.2	175
7.2	176	== 3.2 Example to join LoRaWAN network ==
2.2	177
6.2	178	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.
2.2	179
7.2	180	[[image:1652953414711-647.png\|\|height="337" width="723"]]
2.2	181
15.3	182	(((
2.2	183	The RS485-BL in this example connected to two RS485 devices for demonstration, user can connect to other RS485 devices via the same method.
15.3	184	)))
2.2	185
15.3	186	(((
2.2	187	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:
15.3	188	)))
2.2	189
15.3	190	(((
2.2	191	Step 1: Create a device in TTN V3 with the OTAA keys from RS485-BL.
15.3	192	)))
2.2	193
15.3	194	(((
2.2	195	Each RS485-BL is shipped with a sticker with unique device EUI:
15.3	196	)))
2.2	197
15.2	198	[[image:1652953462722-299.png]]
2.2	199
15.3	200	(((
2.2	201	User can enter this key in their LoRaWAN Server portal. Below is TTN V3 screen shot:
15.3	202	)))
2.2	203
15.3	204	(((
2.2	205	Add APP EUI in the application.
15.3	206	)))
2.2	207
	208
15.2	209	[[image:image-20220519174512-1.png]]
2.2	210
15.2	211	[[image:image-20220519174512-2.png\|\|height="328" width="731"]]
2.2	212
15.2	213	[[image:image-20220519174512-3.png\|\|height="556" width="724"]]
2.2	214
15.2	215	[[image:image-20220519174512-4.png]]
2.2	216
	217	You can also choose to create the device manually.
	218
15.2	219	[[image:1652953542269-423.png\|\|height="710" width="723"]]
2.2	220
	221	Add APP KEY and DEV EUI
	222
15.2	223	[[image:1652953553383-907.png\|\|height="514" width="724"]]
2.2	224
	225
15.2	226	(((
2.2	227	Step 2: Power on RS485-BL and it will auto join to the TTN V3 network. After join success, it will start to upload message to TTN V3 and user can see in the panel.
15.2	228	)))
2.2	229
15.2	230	[[image:1652953568895-172.png\|\|height="232" width="724"]]
2.2	231
29.21	232
15.5	233	== 3.3 Configure Commands to read data ==
2.2	234
15.5	235	(((
29.6	236	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.
	237
	238
15.5	239	)))
2.2	240
15.5	241	=== 3.3.1 onfigure UART settings for RS485 or TTL communication ===
2.2	242
	243	RS485-BL can connect to either RS485 sensors or TTL sensor. User need to specify what type of sensor need to connect.
	244
15.5	245	~1. RS485-MODBUS mode:
2.2	246
	247	AT+MOD=1 ~/~/ Support RS485-MODBUS type sensors. User can connect multiply RS485 , Modbus sensors to the A / B pins.
	248
15.5	249	2. TTL mode:
2.2	250
	251	AT+MOD=2 ~/~/ Support TTL Level sensors, User can connect one TTL Sensor to the TXD/RXD/GND pins.
	252
	253	RS485-BL default UART settings is 9600, no parity, stop bit 1. If the sensor has a different settings, user can change the RS485-BL setting to match.
	254
15.5	255	(% border="1" style="background-color:#ffffcc; color:green; width:795px" %)
	256	\|(((
	257	AT Commands
	258	)))\|(% style="width:285px" %)(((
	259	Description
	260	)))\|(% style="width:347px" %)(((
	261	Example
	262	)))
	263	\|(((
	264	AT+BAUDR
	265	)))\|(% style="width:285px" %)(((
	266	Set the baud rate (for RS485 connection). Default Value is: 9600.
	267	)))\|(% style="width:347px" %)(((
	268	(((
2.2	269	AT+BAUDR=9600
15.5	270	)))
2.2	271
15.5	272	(((
2.2	273	Options: (1200,2400,4800,14400,19200,115200)
	274	)))
15.5	275	)))
	276	\|(((
	277	AT+PARITY
	278	)))\|(% style="width:285px" %)(((
	279	(((
2.2	280	Set UART parity (for RS485 connection)
15.5	281	)))
2.2	282
15.5	283	(((
2.2	284	Default Value is: no parity.
15.5	285	)))
	286	)))\|(% style="width:347px" %)(((
	287	(((
2.2	288	AT+PARITY=0
15.5	289	)))
2.2	290
15.5	291	(((
2.2	292	Option: 0: no parity, 1: odd parity, 2: even parity
	293	)))
15.5	294	)))
	295	\|(((
	296	AT+STOPBIT
	297	)))\|(% style="width:285px" %)(((
	298	(((
2.2	299	Set serial stopbit (for RS485 connection)
15.5	300	)))
2.2	301
15.5	302	(((
2.2	303	Default Value is: 1bit.
15.5	304	)))
	305	)))\|(% style="width:347px" %)(((
	306	(((
2.2	307	AT+STOPBIT=0 for 1bit
15.5	308	)))
2.2	309
15.5	310	(((
2.2	311	AT+STOPBIT=1 for 1.5 bit
15.5	312	)))
2.2	313
15.5	314	(((
2.2	315	AT+STOPBIT=2 for 2 bits
	316	)))
15.5	317	)))
2.2	318
15.6	319	=== 3.3.2 Configure sensors ===
2.2	320
15.6	321	(((
	322	Some sensors might need to configure before normal operation. User can configure such sensor via PC or through RS485-BL AT Commands (% style="color:#4f81bd" %)AT+CFGDEV.
	323	)))
2.2	324
15.6	325	(((
	326	When user issue an (% style="color:#4f81bd" %)AT+CFGDEV(%%) command, Each (% style="color:#4f81bd" %)AT+CFGDEV(%%) equals to send a command to the RS485 or TTL sensors. This command will only run when user input it and won’t run during each sampling.
	327	)))
2.2	328
15.6	329	(% border="1" style="background-color:#ffffcc; color:green; width:806px" %)
	330	\|AT Commands\|(% style="width:418px" %)Description\|(% style="width:256px" %)Example
	331	\|AT+CFGDEV\|(% style="width:418px" %)(((
2.2	332	This command is used to configure the RS485/TTL devices; they won’t be used during sampling.
	333
15.6	334	AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,
2.2	335
15.6	336	mm: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command
	337	)))\|(% style="width:256px" %)AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m
2.2	338
29.24	339	Detail of AT+CFGDEV command see [[AT+CFGDEV detail>>\|\|anchor="HRS485DebugCommand28AT2BCFGDEV29"]].
2.2	340
29.22	341
15.6	342	=== 3.3.3 Configure read commands for each sampling ===
2.2	343
15.6	344	(((
2.2	345	RS485-BL is a battery powered device; it will sleep most of time. And wake up on each period and read RS485 / TTL sensor data and uplink.
15.6	346	)))
2.2	347
15.6	348	(((
2.2	349	During each sampling, we need to confirm what commands we need to send to the sensors to read data. After the RS485/TTL sensors send back the value, it normally includes some bytes and we only need a few from them for a shorten payload.
15.6	350	)))
2.2	351
15.6	352	(((
2.2	353	To save the LoRaWAN network bandwidth, we might need to read data from different sensors and combine their valid value into a short payload.
15.6	354	)))
2.2	355
15.6	356	(((
2.2	357	This section describes how to achieve above goals.
15.6	358	)))
2.2	359
15.6	360	(((
2.2	361	During each sampling, the RS485-BL can support 15 commands to read sensors. And combine the return to one or several uplink payloads.
15.6	362	)))
2.2	363
15.6	364	(((
2.2	365	Command from RS485-BL to Sensor:
15.6	366	)))
2.2	367
15.6	368	(((
2.2	369	RS485-BL can send out pre-set max 15 strings via AT+COMMAD1, ATCOMMAND2,…, to AT+COMMANDF . All commands are of same grammar.
15.6	370	)))
2.2	371
15.6	372	(((
2.2	373	Handle return from sensors to RS485-BL:
15.6	374	)))
2.2	375
15.6	376	(((
2.2	377	After RS485-BL send out a string to sensor, RS485-BL will wait for the return from RS485 or TTL sensor. And user can specify how to handle the return, by AT+DATACUT or AT+SEARCH commands
15.6	378	)))
2.2	379
15.6	380	* (((
	381	AT+DATACUT
	382	)))
2.2	383
15.6	384	(((
2.2	385	When the return value from sensor have fix length and we know which position the valid value we should get, we can use AT+DATACUT command.
15.6	386	)))
2.2	387
15.6	388	* (((
	389	AT+SEARCH
	390	)))
2.2	391
15.6	392	(((
2.2	393	When the return value from sensor is dynamic length and we are not sure which bytes the valid data is, instead, we know what value the valid value following. We can use AT+SEARCH to search the valid value in the return string.
15.6	394	)))
2.2	395
15.6	396	(((
2.2	397	Define wait timeout:
15.6	398	)))
2.2	399
15.6	400	(((
2.2	401	Some RS485 device might has longer delay on reply, so user can use AT+CMDDL to set the timeout for getting reply after the RS485 command is sent. For example, AT+CMDDL1=1000 to send the open time to 1000ms
15.6	402	)))
2.2	403
15.6	404	(((
2.2	405	After we got the valid value from each RS485 commands, we need to combine them together with the command AT+DATAUP.
15.6	406	)))
2.2	407
	408	Examples:
	409
	410	Below are examples for the how above AT Commands works.
	411
	412	AT+COMMANDx : This command will be sent to RS485/TTL devices during each sampling, Max command length is 14 bytes. The grammar is:
	413
19.2	414	(% border="1" class="table-bordered" style="background-color:#4f81bd; color:white; width:501px" %)
18.2	415	\|(% style="width:498px" %)(((
2.2	416	AT+COMMANDx=xx xx xx xx xx xx xx xx xx xx xx xx,m
	417
	418	xx xx xx xx xx xx xx xx xx xx xx xx: The RS485 command to be sent
	419
	420	m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command
	421	)))
	422
	423	For example, if we have a RS485 sensor. The command to get sensor value is: 01 03 0B B8 00 02 46 0A. Where 01 03 0B B8 00 02 is the Modbus command to read the register 0B B8 where stored the sensor value. The 46 0A is the CRC-16/MODBUS which calculate manually.
	424
	425	In the RS485-BL, we should use this command AT+COMMAND1=01 03 0B B8 00 02,1 for the same.
	426
	427	AT+SEARCHx: This command defines how to handle the return from AT+COMMANDx.
	428
19.2	429	(% border="1" class="table-bordered" style="background-color:#4f81bd; color:white; width:580px" %)
18.2	430	\|(% style="width:577px" %)(((
2.2	431	AT+SEARCHx=aa,xx xx xx xx xx
	432
	433	* aa: 1: prefix match mode; 2: prefix and suffix match mode
	434	* xx xx xx xx xx: match string. Max 5 bytes for prefix and 5 bytes for suffix
	435	)))
	436
18.2	437	Examples:
2.2	438
29.27	439	1）For a return string from AT+COMMAND1: 16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
2.2	440
	441	If we set AT+SEARCH1=1,1E 56 34. (max 5 bytes for prefix)
	442
18.2	443	The valid data will be all bytes after 1E 56 34 , so it is (% style="background-color:yellow" %)2e 30 58 5f 36 41 30 31 00 49
2.2	444
18.2	445	[[image:1653271044481-711.png]]
2.2	446
29.27	447	2）For a return string from AT+COMMAND1: 16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
2.2	448
	449	If we set AT+SEARCH1=2, 1E 56 34+31 00 49
	450
18.2	451	Device will search the bytes between 1E 56 34 and 31 00 49. So it is(% style="background-color:yellow" %) 2e 30 58 5f 36 41 30
2.2	452
19.2	453	[[image:1653271276735-972.png]]
2.2	454
	455	AT+DATACUTx : This command defines how to handle the return from AT+COMMANDx, max return length is 45 bytes.
	456
23.2	457	(% style="background-color:#4f81bd; color:white; width:729px" %)
	458	\|(% style="width:726px" %)(((
2.2	459	AT+DATACUTx=a,b,c
	460
	461	* a: length for the return of AT+COMMAND
	462	* b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.
6.2	463	* c: define the position for valid value.
2.2	464	)))
	465
29.27	466	Examples:
2.2	467
	468	* Grab bytes:
	469
23.2	470	[[image:1653271581490-837.png\|\|height="313" width="722"]]
2.2	471
29.26	472
2.2	473	* Grab a section.
	474
23.2	475	[[image:1653271648378-342.png\|\|height="326" width="720"]]
2.2	476
29.29	477
2.2	478	* Grab different sections.
	479
23.2	480	[[image:1653271657255-576.png\|\|height="305" width="730"]]
2.2	481
24.2	482	(((
23.2	483	(% style="color:red" %)Note:
24.2	484	)))
2.2	485
24.2	486	(((
2.2	487	AT+SEARCHx and AT+DATACUTx can be used together, if both commands are set, RS485-BL will first process AT+SEARCHx on the return string and get a temporary string, and then process AT+DATACUTx on this temporary string to get the final payload. In this case, AT+DATACUTx need to set to format AT+DATACUTx=0,xx,xx where the return bytes set to 0.
24.2	488	)))
2.2	489
24.2	490	(((
23.2	491	Example:
24.2	492	)))
2.2	493
24.2	494	(((
23.2	495	(% style="color:red" %)AT+COMMAND1=11 01 1E D0,0
24.2	496	)))
2.2	497
24.2	498	(((
23.2	499	(% style="color:red" %)AT+SEARCH1=1,1E 56 34
24.2	500	)))
2.2	501
24.2	502	(((
23.2	503	(% style="color:red" %)AT+DATACUT1=0,2,1~~5
24.2	504	)))
2.2	505
24.2	506	(((
23.2	507	(% style="color:red" %)Return string from AT+COMMAND1: 16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49
24.2	508	)))
2.2	509
24.2	510	(((
23.2	511	(% style="color:red" %)String after SEARCH command: 2e 30 58 5f 36 41 30 31 00 49
24.2	512	)))
2.2	513
24.2	514	(((
23.2	515	(% style="color:red" %)Valid payload after DataCUT command: 2e 30 58 5f 36
24.2	516	)))
2.2	517
24.2	518	[[image:1653271763403-806.png]]
2.2	519
29.30	520
26.2	521	=== 3.3.4 Compose the uplink payload ===
2.2	522
26.2	523	(((
2.2	524	Through AT+COMMANDx and AT+DATACUTx we got valid value from each RS485 commands, Assume these valid value are RETURN1, RETURN2, .., to RETURNx. The next step is how to compose the LoRa Uplink Payload by these RETURNs. The command is AT+DATAUP.
26.2	525	)))
2.2	526
26.2	527	(((
29.33	528	(% style="color:#037691" %)Examples: AT+DATAUP=0
26.2	529	)))
2.2	530
26.2	531	(((
	532	Compose the uplink payload with value returns in sequence and send with (% style="color:red" %)A SIGNLE UPLINK.
	533	)))
2.2	534
26.2	535	(((
2.2	536	Final Payload is
26.2	537	)))
2.2	538
26.2	539	(((
29.33	540	(% style="color:#4f81bd" %)Battery Info+PAYVER + VALID Value from RETURN1 + Valid Value from RETURN2 + … + RETURNx
26.2	541	)))
2.2	542
26.2	543	(((
2.2	544	Where PAYVER is defined by AT+PAYVER, below is an example screen shot.
26.2	545	)))
2.2	546
26.2	547	[[image:1653272787040-634.png\|\|height="515" width="719"]]
2.2	548
29.31	549
29.33	550
26.2	551	(((
29.33	552	(% style="color:#037691" %)Examples: AT+DATAUP=1
29.32	553
	554
26.2	555	)))
2.2	556
26.2	557	(((
	558	Compose the uplink payload with value returns in sequence and send with (% style="color:red" %)Multiply UPLINKs.
	559	)))
2.2	560
26.2	561	(((
2.2	562	Final Payload is
26.2	563	)))
2.2	564
26.2	565	(((
29.33	566	(% style="color:#4f81bd" %)Battery Info+PAYVER + PAYLOAD COUNT + PAYLOAD# + DATA
26.2	567	)))
2.2	568
26.2	569	1. (((
	570	Battery Info (2 bytes): Battery voltage
	571	)))
	572	1. (((
	573	PAYVER (1 byte): Defined by AT+PAYVER
	574	)))
	575	1. (((
	576	PAYLOAD COUNT (1 byte): Total how many uplinks of this sampling.
	577	)))
	578	1. (((
	579	PAYLOAD# (1 byte): Number of this uplink. (from 0,1,2,3…,to PAYLOAD COUNT)
	580	)))
	581	1. (((
	582	DATA: Valid value: max 6 bytes(US915 version here, Notice*!) for each uplink so each uplink <= 11 bytes. For the last uplink, DATA will might less than 6 bytes
	583	)))
2.2	584
26.2	585	[[image:1653272817147-600.png\|\|height="437" width="717"]]
2.2	586
	587	So totally there will be 3 uplinks for this sampling, each uplink includes 6 bytes DATA
	588
29.36	589
28.2	590	DATA1=RETURN1 Valid Value = (% style="background-color:#4f81bd; color:white" %) 20 20 0a 33 90 41
2.2	591
28.2	592	DATA2=1^^st^^ ~~ 6^^th^^ byte of Valid value of RETURN10= (% style="background-color:#4f81bd; color:white" %)02 aa 05 81 0a 20
2.2	593
28.2	594	DATA3=7^^th^^ ~~ 11^^th^^ bytes of Valid value of RETURN10 =(% style="background-color:#4f81bd; color:white" %) 20 20 20 2d 30
2.2	595
29.36	596
2.2	597	Below are the uplink payloads:
	598
28.2	599	[[image:1653272901032-107.png]]
2.2	600
29.34	601
28.2	602	(% style="color:red" %)Notice: the Max bytes is according to the max support bytes in different Frequency Bands for lowest SF. As below:
2.2	603
	604	~* For AU915/AS923 bands, if UplinkDwell time=0, max 51 bytes for each uplink ( so 51 -5 = 46 max valid date)
	605
	606	* For AU915/AS923 bands, if UplinkDwell time=1, max 11 bytes for each uplink ( so 11 -5 = 6 max valid date).
	607
	608	* For US915 band, max 11 bytes for each uplink ( so 11 -5 = 6 max valid date).
	609
	610	~* For all other bands: max 51 bytes for each uplink ( so 51 -5 = 46 max valid date).
	611
29.36	612
	613
28.2	614	=== 3.3.5 Uplink on demand ===
2.2	615
28.2	616	(((
2.2	617	Except uplink periodically, RS485-BL is able to uplink on demand. The server sends downlink command to RS485-BL and RS485 will uplink data base on the command.
28.2	618	)))
2.2	619
28.2	620	(((
2.2	621	Downlink control command:
28.2	622	)))
2.2	623
28.2	624	(((
	625	0x08 command: Poll an uplink with current command set in RS485-BL.
	626	)))
2.2	627
28.2	628	(((
	629	0xA8 command: Send a command to RS485-BL and uplink the output from sensors.
29.37	630
	631
28.2	632	)))
2.2	633
28.2	634	=== 3.3.6 Uplink on Interrupt ===
2.2	635
28.2	636	Put the interrupt sensor between 3.3v_out and GPIO ext.
2.2	637
28.2	638	[[image:1653273818896-432.png]]
2.2	639
29.38	640
28.4	641	(((
2.2	642	AT+INTMOD=0 Disable Interrupt
28.4	643	)))
2.2	644
28.4	645	(((
2.2	646	AT+INTMOD=1 Interrupt trigger by rising or falling edge.
28.4	647	)))
2.2	648
28.4	649	(((
2.2	650	AT+INTMOD=2 Interrupt trigger by falling edge. ( Default Value)
28.4	651	)))
2.2	652
28.4	653	(((
2.2	654	AT+INTMOD=3 Interrupt trigger by rising edge.
29.38	655
	656
28.4	657	)))
2.2	658
28.2	659	== 3.4 Uplink Payload ==
2.2	660
28.3	661	(% border="1" style="background-color:#4f81bd; color:white; width:850px" %)
	662	\|Size(bytes)\|(% style="width:130px" %)2\|(% style="width:93px" %)1\|(% style="width:509px" %)Length depends on the return from the commands
	663	\|Value\|(% style="width:130px" %)(((
	664	(((
2.2	665	Battery(mV)
28.3	666	)))
2.2	667
28.3	668	(((
2.2	669	&
28.3	670	)))
2.2	671
28.3	672	(((
2.2	673	Interrupt _Flag
28.3	674	)))
	675	)))\|(% style="width:93px" %)(((
2.2	676	PAYLOAD_VER
	677
	678
28.3	679	)))\|(% 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.
2.2	680
	681	Below is the decoder for the first 3 bytes. The rest bytes are dynamic depends on different RS485 sensors.
	682
29.2	683	(((
29.39	684	{{{function Decoder(bytes, port) {}}}
29.2	685	)))
2.2	686
29.2	687	(((
29.39	688	{{{//Payload Formats of RS485-BL Deceive}}}
29.2	689	)))
2.2	690
29.2	691	(((
29.39	692	{{{return {}}}
29.2	693	)))
2.2	694
29.2	695	(((
29.39	696	{{{ //Battery,units:V}}}
29.2	697	)))
2.2	698
29.2	699	(((
29.39	700	{{{ BatV:((bytes[0]<<8 \| bytes[1])&0x7fff)/1000,}}}
29.2	701	)))
2.2	702
29.2	703	(((
29.39	704	{{{ //GPIO_EXTI }}}
29.2	705	)))
2.2	706
29.2	707	(((
29.39	708	{{{ EXTI_Trigger:(bytes[0] & 0x80)? "TRUE":"FALSE",}}}
29.2	709	)))
2.2	710
29.2	711	(((
29.39	712	{{{ //payload of version}}}
29.2	713	)))
2.2	714
29.2	715	(((
29.39	716	{{{ Pay_ver:bytes[2],}}}
29.2	717	)))
2.2	718
29.2	719	(((
29.39	720	{{{ }; }}}
29.2	721	)))
2.2	722
29.2	723	(((
29.40	724	}
29.39	725
	726
29.2	727	)))
2.2	728
29.2	729	(((
2.2	730	TTN V3 uplink screen shot.
29.2	731	)))
2.2	732
29.2	733	[[image:1653274001211-372.png\|\|height="192" width="732"]]
2.2	734
29.39	735
29.3	736	== 3.5 Configure RS485-BL via AT or Downlink ==
2.2	737
29.40	738	User can configure RS485-BL via AT Commands or LoRaWAN Downlink Commands
2.2	739
	740	There are two kinds of Commands:
	741
29.40	742	* (% style="color:#4f81bd" %)Common Commands(%%): They should be available for each sensor, such as: change uplink interval, reset device. For firmware v1.3, user can find what common commands it supports: [[End Device AT Commands and Downlink Command>>doc:Main.End Device AT Commands and Downlink Command.WebHome]]
2.2	743
29.40	744	* (% style="color:#4f81bd" %)Sensor Related Commands(%%): These commands are special designed for RS485-BL. User can see these commands below:
2.2	745
29.40	746	=== 3.5.1 Common Commands: ===
2.2	747
29.40	748	They should be available for each of Dragino Sensors, such as: change uplink interval, reset device. For firmware v1.3, user can find what common commands it supports: [[End Device AT Commands and Downlink Command>>doc:Main.End Device AT Commands and Downlink Command.WebHome]]
2.2	749
29.40	750
	751	=== 3.5.2 Sensor related commands: ===
	752
29.41	753	==== ====
2.2	754
29.41	755	==== Choose Device Type (RS485 or TTL) ====
	756
2.2	757	RS485-BL can connect to either RS485 sensors or TTL sensor. User need to specify what type of sensor need to connect.
	758
29.42	759	* AT Command
2.2	760
30.3	761	(% class="box infomessage" %)
	762	(((
2.2	763	AT+MOD=1 ~/~/ Set to support RS485-MODBUS type sensors. User can connect multiply RS485 , Modbus sensors to the A / B pins.
30.3	764	)))
2.2	765
30.3	766	(% class="box infomessage" %)
	767	(((
2.2	768	AT+MOD=2 ~/~/ Set to support TTL Level sensors, User can connect one TTL Sensor to the TXD/RXD/GND pins.
30.3	769	)))
2.2	770
	771
29.42	772	* Downlink Payload
2.2	773
29.42	774	0A aa ~-~-> same as AT+MOD=aa
2.2	775
	776
	777
29.43	778	==== RS485 Debug Command (AT+CFGDEV) ====
2.2	779
	780	This command is used to configure the RS485 or TTL sensors; they won’t be used during sampling.
	781
29.43	782	* AT Command
2.2	783
30.3	784	(% class="box infomessage" %)
	785	(((
	786	AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m
	787	)))
2.2	788
	789	m: 0: no CRC; 1: add CRC-16/MODBUS in the end of this command.
	790
	791
29.43	792	* Downlink Payload
2.2	793
	794	Format: A8 MM NN XX XX XX XX YY
	795
	796	Where:
	797
	798	* MM: 1: add CRC-16/MODBUS ; 0: no CRC
	799	* NN: The length of RS485 command
	800	* XX XX XX XX: RS485 command total NN bytes
	801	* YY: How many bytes will be uplink from the return of this RS485 command, if YY=0, RS485-BL will execute the downlink command without uplink; if YY>0, RS485-BL will uplink total YY bytes from the output of this RS485 command
	802
	803	Example 1:
	804
	805	To connect a Modbus Alarm with below commands.
	806
30.2	807	* The command to active alarm is: 0A 05 00 04 00 01 4C B0. Where 0A 05 00 04 00 01 is the Modbus command to read the register 00 40 where stored the DI status. The 4C B0 is the CRC-16/MODBUS which calculate manually.
2.2	808
30.2	809	* The command to deactivate alarm is: 0A 05 00 04 00 00 8D 70. Where 0A 05 00 04 00 00 is the Modbus command to read the register 00 40 where stored the DI status. The 8D 70 is the CRC-16/MODBUS which calculate manually.
2.2	810
	811	So if user want to use downlink command to control to RS485 Alarm, he can use:
	812
30.2	813	(% style="color:#037691" %)A8 01 06 0A 05 00 04 00 01 00(%%): to activate the RS485 Alarm
2.2	814
30.2	815	(% style="color:#037691" %)A8 01 06 0A 05 00 04 00 00 00(%%): to deactivate the RS485 Alarm
2.2	816
	817	A8 is type code and 01 means add CRC-16/MODBUS at the end, the 3^^rd^^ byte is 06, means the next 6 bytes are the command to be sent to the RS485 network, the final byte 00 means this command don’t need to acquire output.
	818
	819
	820	Example 2:
	821
	822	Check TTL Sensor return:
	823
30.2	824	[[image:1654132684752-193.png]]
2.2	825
	826
	827
30.3	828	==== Set Payload version ====
2.2	829
	830	This is the first byte of the uplink payload. RS485-BL can connect to different sensors. User can set the PAYVER field to tell server how to decode the current payload.
	831
30.3	832	* AT Command:
2.2	833
30.3	834	(% class="box infomessage" %)
	835	(((
	836	AT+PAYVER: Set PAYVER field = 1
	837	)))
2.2	838
	839
30.3	840	* Downlink Payload:
2.2	841
30.4	842	0xAE 01 ~-~-> Set PAYVER field = 0x01
2.2	843
30.4	844	0xAE 0F ~-~-> Set PAYVER field = 0x0F
2.2	845
	846
	847
30.4	848	==== Set RS485 Sampling Commands ====
	849
2.2	850	AT+COMMANDx, AT+DATACUTx and AT+SEARCHx
	851
30.5	852	These three commands are used to configure how the RS485-BL polling data from Modbus device. Detail of usage please see : [[polling RS485 device>>\|\|anchor="H3.3.3Configurereadcommandsforeachsampling"]].
2.2	853
	854
30.7	855	* AT Command:
2.2	856
30.7	857	(% class="box infomessage" %)
	858	(((
	859	AT+COMMANDx: Configure RS485 read command to sensor.
	860	)))
2.2	861
30.7	862	(% class="box infomessage" %)
	863	(((
	864	AT+DATACUTx: Configure how to handle return from RS485 devices.
	865	)))
2.2	866
30.7	867	(% class="box infomessage" %)
	868	(((
	869	AT+SEARCHx: Configure search command
	870	)))
2.2	871
	872
30.7	873	* Downlink Payload:
2.2	874
30.7	875	0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
2.2	876
30.7	877	(% style="color:red" %)Note(%%): if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
2.2	878
	879	Format: AF MM NN LL XX XX XX XX YY
	880
	881	Where:
	882
	883	* MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
30.7	884	* NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
	885	* LL: The length of AT+COMMAND or AT+DATACUT command
2.2	886	* XX XX XX XX: AT+COMMAND or AT+DATACUT command
30.7	887	* YY: If YY=0, RS485-BL will execute the downlink command without uplink; if YY=1, RS485-BL will execute an uplink after got this command.
2.2	888
30.7	889	Example:
2.2	890
30.7	891	(% style="color:#037691" %)AF 03 01 06 0A 05 00 04 00 01 00(%%): Same as AT+COMMAND3=0A 05 00 04 00 01,1
2.2	892
30.7	893	(% style="color:#037691" %)AF 03 02 06(% style="color:orange" %) 10 (% style="color:red" %)01 (% style="color:green" %)05 06 09 0A(% style="color:#037691" %) 00(%%): Same as AT+DATACUT3=(% style="color:orange" %)16(%%),(% style="color:red" %)1(%%),(% style="color:green" %)5+6+9+10
2.2	894
30.7	895	(% style="color:#037691" %)AF 03 02 06 (% style="color:orange" %)0B(% style="color:red" %) 02 (% style="color:green" %)05 07 08 0A (% style="color:#037691" %)00(%%): Same as AT+DATACUT3=(% style="color:orange" %)11(%%),(% style="color:red" %)2(%%),(% style="color:green" %)5~~7+8~~10
2.2	896
	897
30.8	898	0xAB downlink command can be used for set AT+SEARCHx
2.2	899
30.8	900	Example: AB aa 01 03 xx xx xx (03 here means there are total 3 bytes after 03) So
2.2	901
	902	* AB aa 01 03 xx xx xx same as AT+SEARCHaa=1,xx xx xx
	903	* AB aa 02 03 xx xx xx 02 yy yy(03 means there are 3 bytes after 03, they are xx xx xx;02 means there are 2 bytes after 02, they are yy yy) so the commands
	904
	905	AB aa 02 03 xx xx xx 02 yy yy same as AT+SEARCHaa=2,xx xx xx+yy yy
	906
	907
30.8	908
31.2	909	==== Fast command to handle MODBUS device ====
2.2	910
	911	AT+MBFUN is valid since v1.3 firmware version. The command is for fast configure to read Modbus devices. It is only valid for the devices which follow the [[MODBUS-RTU protocol>>url:https://www.modbustools.com/modbus.html]].
	912
	913	This command is valid since v1.3 firmware version
	914
	915
31.2	916	AT+MBFUN has only two value:
2.2	917
32.2	918	* AT+MBFUN=1: Enable Modbus reading. And get response base on the MODBUS return
2.2	919
	920	AT+MBFUN=1, device can auto read the Modbus function code: 01, 02, 03 or 04. AT+MBFUN has lower priority vs AT+DATACUT command. If AT+DATACUT command is configured, AT+MBFUN will be ignore.
	921
32.2	922	* AT+MBFUN=0: Disable Modbus fast reading.
2.2	923
31.2	924	Example:
	925
2.2	926	* AT+MBFUN=1 and AT+DATACUT1/AT+DATACUT2 are not configure (0,0,0).
	927	* AT+COMMAND1= 01 03 00 10 00 08,1 ~-~-> read slave address 01 , function code 03, start address 00 01, quantity of registers 00 08.
	928	* AT+COMMAND2= 01 02 00 40 00 10,1 ~-~-> read slave address 01 , function code 02, start address 00 40, quantity of inputs 00 10.
	929
31.2	930	[[image:1654133913295-597.png]]
2.2	931
	932
32.2	933	[[image:1654133954153-643.png]]
2.2	934
	935
32.3	936	* Downlink Commands:
2.2	937
32.3	938	A9 aa ~-~-> Same as AT+MBFUN=aa
2.2	939
	940
32.3	941
32.4	942	==== RS485 command timeout ====
2.2	943
	944	Some Modbus device has slow action to send replies. This command is used to configure the RS485-BL to use longer time to wait for their action.
	945
	946	Default value: 0, range: 0 ~~ 5 seconds
	947
	948
32.4	949	* AT Command:
2.2	950
32.4	951	(% class="box infomessage" %)
	952	(((
	953	AT+CMDDLaa=hex(bb cc)
	954	)))
2.2	955
32.5	956	Example:
2.2	957
	958	AT+CMDDL1=1000 to send the open time to 1000ms
	959
	960
32.4	961	* Downlink Payload:
2.2	962
	963	0x AA aa bb cc
	964
	965	Same as: AT+CMDDLaa=hex(bb cc)
	966
32.5	967	Example:
2.2	968
32.5	969	0xAA 01 03 E8 ~-~-> Same as AT+CMDDL1=1000 ms
2.2	970
	971
	972
32.6	973	==== Uplink payload mode ====
	974
2.2	975	Define to use one uplink or multiple uplinks for the sampling.
	976
32.7	977	The use of this command please see: [[Compose Uplink payload>>\|\|anchor="H3.3.4Composetheuplinkpayload"]]
2.2	978
32.8	979	* AT Command:
2.2	980
32.8	981	(% class="box infomessage" %)
	982	(((
	983	AT+DATAUP=0
	984	)))
2.2	985
32.8	986	(% class="box infomessage" %)
	987	(((
	988	AT+DATAUP=1
	989	)))
2.2	990
	991
32.8	992	* Downlink Payload:
2.2	993
32.9	994	0xAD 00 ~-~-> Same as AT+DATAUP=0
2.2	995
32.9	996	0xAD 01 ~-~-> Same as AT+DATAUP=1
2.2	997
	998
	999
32.9	1000	==== Manually trigger an Uplink ====
	1001
2.2	1002	Ask device to send an uplink immediately.
	1003
	1004	* Downlink Payload:
	1005
	1006	0x08 FF, RS485-BL will immediately send an uplink.
	1007
	1008
	1009	==== Clear RS485 Command ====
	1010
	1011	The AT+COMMANDx and AT+DATACUTx settings are stored in special location, user can use below command to clear them.
	1012
	1013
	1014	* AT Command:
	1015
	1016	AT+CMDEAR=mm,nn mm: start position of erase ,nn: stop position of erase
	1017
	1018	Etc. AT+CMDEAR=1,10 means erase AT+COMMAND1/AT+DATACUT1 to AT+COMMAND10/AT+DATACUT10
	1019
6.2	1020	Example screen shot after clear all RS485 commands.
2.2	1021
	1022
	1023
	1024	The uplink screen shot is:
	1025
	1026	[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image023.png]]
	1027
	1028
	1029	* Downlink Payload:
	1030
	1031	0x09 aa bb same as AT+CMDEAR=aa,bb
	1032
	1033
	1034	==== Set Serial Communication Parameters ====
	1035
	1036	Set the Rs485 serial communication parameters:
	1037
	1038	* AT Command:
	1039
	1040	Set Baud Rate:
	1041
	1042	AT+BAUDR=9600 ~/~/ Options: (1200,2400,4800,14400,19200,115200)
	1043
	1044
	1045	Set UART parity
	1046
	1047	AT+PARITY=0 ~/~/ Option: 0: no parity, 1: odd parity, 2: even parity
	1048
	1049
	1050	Set STOPBIT
	1051
	1052	AT+STOPBIT=0 ~/~/ Option: 0 for 1bit; 1 for 1.5 bit ; 2 for 2 bits
	1053
	1054
	1055	* Downlink Payload:
	1056
	1057	A7 01 aa bb: Same AT+BAUDR=hex(aa bb)*100
	1058
	1059	Example:
	1060
	1061	* A7 01 00 60 same as AT+BAUDR=9600
	1062	* A7 01 04 80 same as AT+BAUDR=115200
	1063
	1064	A7 02 aa: Same as AT+PARITY=aa (aa value: 00 , 01 or 02)
	1065
	1066	A7 03 aa: Same as AT+STOPBIT=aa (aa value: 00 , 01 or 02)
	1067
	1068
	1069	==== Control output power duration ====
	1070
	1071	User can set the output power duration before each sampling.
	1072
	1073	* AT Command:
	1074
	1075	Example:
	1076
	1077	AT+3V3T=1000 ~/~/ 3V3 output power will open 1s before each sampling.
	1078
	1079	AT+5VT=1000 ~/~/ +5V output power will open 1s before each sampling.
	1080
	1081
	1082	* LoRaWAN Downlink Command:
	1083
	1084	07 01 aa bb Same as AT+5VT=(aa bb)
	1085
	1086	07 02 aa bb Same as AT+3V3T=(aa bb)
	1087
	1088
	1089
	1090
32.7	1091	1.
2.2	1092	11. Buttons
	1093
	1094	\|Button\|Feature
	1095	\|RST\|Reboot RS485-BL
	1096
32.7	1097	1.
2.2	1098	11. +3V3 Output
	1099
	1100	RS485-BL has a Controllable +3V3 output, user can use this output to power external sensor.
	1101
6.2	1102	The +3V3 output will be valid for every sampling. RS485-BL will enable +3V3 output before all sampling and disable the +3V3 after all sampling.
2.2	1103
	1104
	1105	The +3V3 output time can be controlled by AT Command.
	1106
	1107	AT+3V3T=1000
	1108
	1109	Means set +3v3 valid time to have 1000ms. So, the real +3v3 output will actually have 1000ms + sampling time for other sensors.
	1110
	1111
	1112	By default, the AT+3V3T=0. This is a special case, means the +3V3 output is always on at any time
	1113
	1114
32.7	1115	1.
2.2	1116	11. +5V Output
	1117
	1118	RS485-BL has a Controllable +5V output, user can use this output to power external sensor.
	1119
6.2	1120	The +5V output will be valid for every sampling. RS485-BL will enable +5V output before all sampling and disable the +5v after all sampling.
2.2	1121
	1122
	1123	The 5V output time can be controlled by AT Command.
	1124
	1125	AT+5VT=1000
	1126
	1127	Means set 5V valid time to have 1000ms. So, the real 5V output will actually have 1000ms + sampling time for other sensors.
	1128
	1129
	1130	By default, the AT+5VT=0. If the external sensor which require 5v and require more time to get stable state, user can use this command to increase the power ON duration for this sensor.
	1131
	1132
	1133
	1134
32.7	1135	1.
2.2	1136	11. LEDs
	1137
	1138	\|LEDs\|Feature
	1139	\|LED1\|Blink when device transmit a packet.
	1140
32.7	1141	1.
2.2	1142	11. Switch Jumper
	1143
	1144	\|Switch Jumper\|Feature
	1145	\|SW1\|(((
	1146	ISP position: Upgrade firmware via UART
	1147
	1148	Flash position: Configure device, check running status.
	1149	)))
	1150	\|SW2\|(((
	1151	5V position: set to compatible with 5v I/O.
	1152
	1153	3.3v position: set to compatible with 3.3v I/O.,
	1154	)))
	1155
	1156	+3.3V: is always ON
	1157
	1158	+5V: Only open before every sampling. The time is by default, it is AT+5VT=0. Max open time. 5000 ms.
	1159
	1160	1. Case Study
	1161
	1162	User can check this URL for some case studies.
	1163
	1164	[[http:~~/~~/wiki.dragino.com/index.php?title=APP_RS485_COMMUNICATE_WITH_SENSORS>>url:http://wiki.dragino.com/index.php?title=APP_RS485_COMMUNICATE_WITH_SENSORS]]
	1165
	1166
	1167
	1168
	1169	1. Use AT Command
	1170	11. Access AT Command
	1171
	1172	RS485-BL supports AT Command set. User can use a USB to TTL adapter plus the 3.5mm Program Cable to connect to RS485-BL to use AT command, as below.
	1173
	1174	[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image027.png]]
	1175
	1176
	1177	In PC, User needs to set serial tool(such as [[putty>>url:https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]], SecureCRT) baud rate to 9600 to access to access serial console of RS485-BL. The default password is 123456. Below is the output for reference:
	1178
	1179	[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image028.png]]
	1180
	1181
	1182
	1183	More detail AT Command manual can be found at [[AT Command Manual>>path:#AT_COMMAND]]
	1184
	1185
	1186
32.7	1187	1.
2.2	1188	11. Common AT Command Sequence
	1189	111. Multi-channel ABP mode (Use with SX1301/LG308)
	1190
	1191	If device has not joined network yet:
	1192
	1193	AT+FDR
	1194
	1195	AT+NJM=0
	1196
	1197	ATZ
	1198
	1199
	1200	If device already joined network:
	1201
	1202	AT+NJM=0
	1203
	1204	ATZ
	1205
32.7	1206	1.
	1207	11.
2.2	1208	111. Single-channel ABP mode (Use with LG01/LG02)
	1209
	1210	AT+FDR Reset Parameters to Factory Default, Keys Reserve
	1211
	1212	AT+NJM=0 Set to ABP mode
	1213
	1214	AT+ADR=0 Set the Adaptive Data Rate Off
	1215
	1216	AT+DR=5 Set Data Rate
	1217
	1218	AT+TDC=60000 Set transmit interval to 60 seconds
	1219
	1220	AT+CHS=868400000 Set transmit frequency to 868.4Mhz
	1221
	1222	AT+RX2FQ=868400000 Set RX2Frequency to 868.4Mhz (according to the result from server)
	1223
	1224	AT+RX2DR=5 Set RX2DR to match the downlink DR from server. see below
	1225
	1226	AT+DADDR=26 01 1A F1 Set Device Address to 26 01 1A F1, this ID can be found in the LoRa Server portal.
	1227
	1228	ATZ Reset MCU
	1229
	1230	Note:
	1231
	1232	1. Make sure the device is set to ABP mode in the IoT Server.
	1233	1. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
	1234	1. Make sure SF / bandwidth setting in LG01/LG02 match the settings of AT+DR. refer [[this link>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/&file=LoRaWAN%201.0.3%20Regional%20Parameters.xlsx]] to see what DR means.
	1235	1. The command AT+RX2FQ and AT+RX2DR is to let downlink work. to set the correct parameters, user can check the actually downlink parameters to be used. As below. Which shows the RX2FQ should use 868400000 and RX2DR should be 5
	1236
	1237	[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image029.png]]
	1238
	1239
	1240	1. FAQ
	1241	11. How to upgrade the image?
	1242
	1243	The RS485-BL LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to RS485-BL to:
	1244
	1245	* Support new features
	1246	* For bug fix
	1247	* Change LoRaWAN bands.
	1248
	1249	Below shows the hardware connection for how to upload an image to RS485-BL:
	1250
	1251	[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image030.png]]
	1252
	1253	Step1: Download [[flash loader>>url:https://www.st.com/content/st_com/en/products/development-tools/software-development-tools/stm32-software-development-tools/stm32-programmers/flasher-stm32.html]].
	1254
	1255	Step2: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
	1256
	1257	Step3: Open flashloader; choose the correct COM port to update.
	1258
	1259
	1260	\|(((
	1261	HOLD PRO then press the RST button, SYS will be ON, then click next
	1262	)))
	1263
	1264	\|(((
	1265	Board detected
	1266	)))
	1267
	1268	\|(((
	1269
	1270	)))
	1271
	1272	[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image031.png]] [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image032.png]]
	1273
	1274
	1275
	1276	[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image033.png]] [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image034.png]]
	1277
	1278
	1279	[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image035.png]] [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image036.png]]
	1280
	1281
32.7	1282	1.
2.2	1283	11. How to change the LoRa Frequency Bands/Region?
	1284
	1285	User can follow the introduction for [[how to upgrade image>>path:#upgrade_image]]. When download the images, choose the required image file for download.
	1286
	1287
	1288
32.7	1289	1.
2.2	1290	11. How many RS485-Slave can RS485-BL connects?
	1291
	1292	The RS485-BL can support max 32 RS485 devices. Each uplink command of RS485-BL can support max 16 different RS485 command. So RS485-BL can support max 16 RS485 devices pre-program in the device for uplink. For other devices no pre-program, user can use the [[downlink message (type code 0xA8) to poll their info>>path:#downlink_A8]].
	1293
	1294
	1295
	1296
	1297	1. Trouble Shooting
	1298	11. Downlink doesn’t work, how to solve it?
	1299
	1300	Please see this link for debug:
	1301
6.2	1302	[[http:~~/~~/wiki.dragino.com/index.php?title=Main_Page#LoRaWAN_Communication_Debug>>url:http://wiki.dragino.com/index.php?title=Main_Page#LoRaWAN_Communication_Debug]]
2.2	1303
	1304
	1305
32.7	1306	1.
2.2	1307	11. Why I can’t join TTN V3 in US915 /AU915 bands?
	1308
	1309	It might about the channels mapping. Please see for detail.
	1310
	1311	[[http:~~/~~/wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#Notice_of_US915.2FCN470.2FAU915_Frequency_band>>url:http://wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#Notice_of_US915.2FCN470.2FAU915_Frequency_band]]
	1312
	1313
	1314
	1315	1. Order Info
	1316
	1317	Part Number: RS485-BL-XXX
	1318
	1319	XXX:
	1320
	1321	* EU433: frequency bands EU433
	1322	* EU868: frequency bands EU868
	1323	* KR920: frequency bands KR920
	1324	* CN470: frequency bands CN470
	1325	* AS923: frequency bands AS923
	1326	* AU915: frequency bands AU915
	1327	* US915: frequency bands US915
	1328	* IN865: frequency bands IN865
	1329	* RU864: frequency bands RU864
	1330	* KZ865: frequency bands KZ865
	1331
	1332	1. Packing Info
	1333
	1334	Package Includes:
	1335
	1336	* RS485-BL x 1
	1337	* Stick Antenna for LoRa RF part x 1
	1338	* Program cable x 1
	1339
	1340	Dimension and weight:
	1341
	1342	* Device Size: 13.5 x 7 x 3 cm
	1343	* Device Weight: 105g
	1344	* Package Size / pcs : 14.5 x 8 x 5 cm
	1345	* Weight / pcs : 170g
	1346
	1347	1. Support
	1348
	1349	* Support is provided Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different timezones we cannot offer live support. However, your questions will be answered as soon as possible in the before-mentioned schedule.
	1350	* Provide as much information as possible regarding your enquiry (product models, accurately describe your problem and steps to replicate it etc) and send a mail to
	1351
	1352	[[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]

Wiki source code of RS485-BL – Waterproof RS485 to LoRaWAN Converter

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