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Title

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

Content

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303	303	)))
304	304	)))
305	305
306		-=== 3.3.2 Configure sensors ===
307	307
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		-)))
311	311
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		-)))
315	315
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" %)(((
	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|(((
319	319	This command is used to configure the RS485/TTL devices; they won’t be used during sampling.
320	320
321		-AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,
	322	+AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m
322	322
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
	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
325	325
326	326	Detail of AT+CFGDEV command see [[AT+CFGDEV detail>>path:#AT_CFGDEV]].
327	327
328		-=== 3.3.3 Configure read commands for each sampling ===
329	329
330		-(((
	330	+
	331	+
	332	+
	333	+1.
	334	+11.
	335	+111. Configure read commands for each sampling
	336	+
331	331	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		-)))
333	333
334		-(((
	339	+
335	335	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		-)))
337	337
338		-(((
	342	+
339	339	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		-)))
341	341
342		-(((
	345	+
343	343	This section describes how to achieve above goals.
344		-)))
345	345
346		-(((
	348	+
347	347	During each sampling, the RS485-BL can support 15 commands to read sensors. And combine the return to one or several uplink payloads.
348		-)))
349	349
350		-(((
	351	+
351	351	**Command from RS485-BL to Sensor:**
352		-)))
353	353
354		-(((
355	355	RS485-BL can send out pre-set max 15 strings via **AT+COMMAD1**, **ATCOMMAND2**,…, to **AT+COMMANDF** . All commands are of same grammar.
356		-)))
357	357
358		-(((
	356	+
359	359	**Handle return from sensors to RS485-BL**:
360		-)))
361	361
362		-(((
363	363	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		-)))
365	365
366		-* (((
367		-**AT+DATACUT**
368		-)))
369	369
370		-(((
	362	+* **AT+DATACUT**
	363	+
371	371	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		-)))
373	373
374		-* (((
375		-**AT+SEARCH**
376		-)))
377	377
378		-(((
	367	+* **AT+SEARCH**
	368	+
379	379	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		-)))
381	381
382		-(((
	371	+
383	383	**Define wait timeout:**
384		-)))
385	385
386		-(((
387	387	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		-)))
389	389
390		-(((
	376	+
391	391	After we got the valid value from each RS485 commands, we need to combine them together with the command **AT+DATAUP**.
392		-)))
393	393
	379	+
394	394	**Examples:**
395	395
396	396	Below are examples for the how above AT Commands works.
397	397
	384	+
398	398	**AT+COMMANDx : **This command will be sent to RS485/TTL devices during each sampling, Max command length is 14 bytes. The grammar is:
399	399
400		-(% border="1" class="table-bordered" %)
401	401	|(((
402	402	**AT+COMMANDx=xx xx xx xx xx xx xx xx xx xx xx xx,m**
403	403
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410	410
411	411	In the RS485-BL, we should use this command AT+COMMAND1=01 03 0B B8 00 02,1 for the same.
412	412
	399	+
413	413	**AT+SEARCHx**: This command defines how to handle the return from AT+COMMANDx.
414	414
415		-(% border="1" class="table-bordered" %)
416	416	|(((
417	417	**AT+SEARCHx=aa,xx xx xx xx xx**
418	418
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430	430
431	431	The valid data will be all bytes after 1E 56 34 , so it is 2e 30 58 5f 36 41 30 31 00 49
432	432
433		-[[image:1652954654347-831.png]]
	419	+[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image013.png]]
434	434
435	435
436	436	1. For a return string from AT+COMMAND1:  16 0c 1e 56 34 2e 30 58 5f 36 41 30 31 00 49

1652954654347-831.png

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1		-XWiki.Xiaoling

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