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1		-RS485-BL – Waterproof RS485 to LoRaWAN Converter
	1	+RS485-LN – RS485 to LoRaWAN Converter

Content

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303	303	)))
304	304	)))
305	305
	306	+=== 3.3.2 Configure sensors ===
306	306
	308	+(((
	309	+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**.
	310	+)))
307	307
	312	+(((
	313	+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.
	314	+)))
308	308
309		-1.
310		-11.
311		-111. Configure sensors
312		-
313		-Some sensors might need to configure before normal operation. User can configure such sensor via PC or through RS485-BL AT Commands AT+CFGDEV.
314		-
315		-
316		-When user issue an AT+CFGDEV command, Each 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.
317		-
318		-|**AT Commands**|**Description**|**Example**
319		-|AT+CFGDEV|(((
	316	+(% border="1" style="background-color:#ffffcc; color:green; width:806px" %)
	317	+|**AT Commands**|(% style="width:418px" %)**Description**|(% style="width:256px" %)**Example**
	318	+|AT+CFGDEV|(% style="width:418px" %)(((
320	320	This command is used to configure the RS485/TTL devices; they won’t be used during sampling.
321	321
322		-AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m
	321	+AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,
323	323
324		-m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command
325		-)))|AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m
	323	+mm: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command
	324	+)))|(% style="width:256px" %)AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m
326	326
327	327	Detail of AT+CFGDEV command see [[AT+CFGDEV detail>>path:#AT_CFGDEV]].
328	328
	328	+=== 3.3.3 Configure read commands for each sampling ===
329	329
330		-
331		-
332		-
333		-1.
334		-11.
335		-111. Configure read commands for each sampling
336		-
	330	+(((
337	337	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.
	332	+)))
338	338
339		-
	334	+(((
340	340	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.
	336	+)))
341	341
342		-
	338	+(((
343	343	To save the LoRaWAN network bandwidth, we might need to read data from different sensors and combine their valid value into a short payload.
	340	+)))
344	344
345		-
	342	+(((
346	346	This section describes how to achieve above goals.
	344	+)))
347	347
348		-
	346	+(((
349	349	During each sampling, the RS485-BL can support 15 commands to read sensors. And combine the return to one or several uplink payloads.
	348	+)))
350	350
351		-
	350	+(((
352	352	**Command from RS485-BL to Sensor:**
	352	+)))
353	353
	354	+(((
354	354	RS485-BL can send out pre-set max 15 strings via **AT+COMMAD1**, **ATCOMMAND2**,…, to **AT+COMMANDF** . All commands are of same grammar.
	356	+)))
355	355
356		-
	358	+(((
357	357	**Handle return from sensors to RS485-BL**:
	360	+)))
358	358
	362	+(((
359	359	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**
	364	+)))
360	360
	366	+* (((
	367	+**AT+DATACUT**
	368	+)))
361	361
362		-* **AT+DATACUT**
363		-
	370	+(((
364	364	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.
	372	+)))
365	365
	374	+* (((
	375	+**AT+SEARCH**
	376	+)))
366	366
367		-* **AT+SEARCH**
368		-
	378	+(((
369	369	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.
	380	+)))
370	370
371		-
	382	+(((
372	372	**Define wait timeout:**
	384	+)))
373	373
	386	+(((
374	374	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
	388	+)))
375	375
376		-
	390	+(((
377	377	After we got the valid value from each RS485 commands, we need to combine them together with the command **AT+DATAUP**.
	392	+)))
378	378
379		-
380	380	**Examples:**
381	381
382	382	Below are examples for the how above AT Commands works.
383	383
384		-
385	385	**AT+COMMANDx : **This command will be sent to RS485/TTL devices during each sampling, Max command length is 14 bytes. The grammar is:
386	386
	400	+(% border="1" class="table-bordered" %)
387	387	|(((
388	388	**AT+COMMANDx=xx xx xx xx xx xx xx xx xx xx xx xx,m**
389	389
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396	396
397	397	In the RS485-BL, we should use this command AT+COMMAND1=01 03 0B B8 00 02,1 for the same.
398	398
399		-
400	400	**AT+SEARCHx**: This command defines how to handle the return from AT+COMMANDx.
401	401
	415	+(% border="1" class="table-bordered" %)
402	402	|(((
403	403	**AT+SEARCHx=aa,xx xx xx xx xx**
404	404
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416	416
417	417	The valid data will be all bytes after 1E 56 34 , so it is 2e 30 58 5f 36 41 30 31 00 49
418	418
419		-[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image013.png]]
	433	+[[image:1652954654347-831.png]]
420	420
421	421
422	422	1. For a return string from AT+COMMAND1:  16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49

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