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21	21	= 2. How to use AT Commands or Downlink command =
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23	23
24		-* **AT Command** : See Devices User Manual for how to connect to device via USB TTL adapter and use. The user manual can be found in each product page of **[[Dragino Products User Manual>>http://wiki.dragino.com/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/]]**.
	24	+* **AT Command** : See Devices User Manual for how to connect to device via USB TTL adapter and use. The user manual can be found in each product page of [[Dragino Official Website>>url:http://www.dragino.com/]]
25	25
26	26	* **LoRaWAN Downlink Command**: The gateway transfer downlink command in HEX format. This page shows the Downlink Command In HEX format. Please note some LoRaWAN servers use base64 as downlink code so user need to convert HEX to Base64 and use. Below are references for how to use downlink command:
27	27	** Use HEX format to send a downlink: [[TTN v3>>Notes for TTN]]
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225	225	(% style="color:blue" %)**Downlink Command: 0x26 (Valid in 006 stack)**
226	226
227	227	(((
228		-Format: Command Code (0x26) followed by 1 byte.
	228	+Downlink Format: 0x26
229	229	)))
230	230
231	231	(((
232		-If the downlink payload=**2601, **Device will reply with firmware version info, device info. frequency band info. detail please check device user manual. Total 5 bytes Example: If device is of firmware version 1.1.0 Upload: xx ~-~- yy ~-~- zz ~-~- 110 total 5 bytes(  FPort= 5 usually).
	232	+Device will reply with firmware version info, device info. frequency band info. detail please check device user manual. Total 5 bytes Example: If device is of firmware version 1.1.0 Upload: xx ~-~- yy ~-~- zz ~-~- 110 total 5 bytes
233	233	)))
234	234
235	235	(((
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438	438
439	439	(% style="color:blue" %)**Downlink Command: 0x05**
440	440
441		-Format: Command Code (0x05) followed by 1 byte mode value.
	441	+Format: Command Code (0x05) followed by 2 bytes mode value.
442	442
443	443	If the downlink payload=0501, it means set end node to use confirm mode, while type code is 05.
444	444
...	...	@@ -485,7 +485,7 @@
485	485
486	486	(% style="color:blue" %)**Downlink Command: 0x05**
487	487
488		-Format: Command Code (0x05) followed by 3 bytes mode value.
	488	+Format: Command Code (0x05) followed by 2 bytes mode value.
489	489
490	490	If the downlink payload=05010101, it means set end node to use confirm mode, while type code is 05.
491	491
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926	926	== 7.14 Transmit Power ==
927	927
928	928
929		-Feature: Get or Set the Transmit Power(0-5, MAX:0, MIN:5, according to LoRaWAN Spec, or 40=10dBm, 41 = 11dBm, …, 50 = 20dBm which is out of LoRaWAN spec. )
	929	+Feature: Get or Set the Transmit Power(0-5, MAX:0, MIN:5, according to LoRaWAN Spec, or 40=10dB, 41 = 11dB, …, 50 = 20dB which is out of LoRaWAN spec. )
930	930
931	931	(% style="color:red" %)**Notice: Transmit Power might be changed by ADR from LoRaWAN server. So manually change TXP also remember to set AT+ADR=0 in sensor**
932	932
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1258	1258	* **Example 1:** Downlink Payload: 320105A00B40  ~/~/ Set AT+DDETECT=1,1440,2880
1259	1259
1260		-*
	1260	+*
1261	1261	** 0x01** : Flag**
1262	1262
1263	1263	**0x05A0 **: ACK_Timout_1 : 1440minutes (24 hours)
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1271	1271	== 7.26 Request the server to send an ACK ==
1272	1272
1273	1273
1274		-Feature: Mode for sending data for which acknowledgment was not received. LoraWAN Network Server(eg. The Things NetWork/ChirpStack/AWS/...).
1275		-
1276	1276	(% style="color:blue" %)**AT Command: AT+PNACKMD**
1277	1277
1278	1278	(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:889px" %)
1279	1279	|(% style="background-color:#4f81bd; color:white; width:160px" %)**Command Example**|(% style="background-color:#4f81bd; color:white; width:627px" %)**Function**|(% style="background-color:#4f81bd; color:white; width:100px" %)**Response**
1280		-|(% style="width:160px" %)AT+PNACKMD=1|(% style="width:627px" %)If the node uploads the ACK as confirm, it will request the LoraWAN Network Server to send an ACK. If the LoraWAN Network Server ack is not received, the node will upload the packets that have not received the ACK the next time it receives the ACK|(% style="width:100px" %)1(((
	1278	+|(% style="width:160px" %)AT+PNACKMD=1|(% style="width:627px" %)If the node uploads the ACK as confirm, it will request the server to send an ACK. If the server ack is not received, the node will upload the packets that have not received the ACK the next time it receives the ACK|(% style="width:100px" %)1(((
1281	1281	OK
1282	1282	)))
1283		-|(% style="width:160px" %)AT+PNACKMD=0|(% style="width:627px" %)off request the LoraWAN Network Server to send an ACK|(% style="width:100px" %)(((
	1281	+|(% style="width:160px" %)AT+PNACKMD=0|(% style="width:627px" %)off request the server to send an ACK|(% style="width:100px" %)(((
1284	1284	0
1285	1285	OK
1286	1286	)))