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1	1	(% class="wikigeneratedid" id="HEndDeviceFrequencyBand" %)
2		- **Contents：**
	2	+
3	3
4	4	{{toc/}}
5	5
6		-
7		-
8		-
9	9	= 1. Introduction =
10	10
11	11	This page list the default frequency band for Dragino End Devices. The frequency bands are base on TTN Frequency Bands. User can modify upgrade firmware to support different frequency band or use AT Command to change the sub band in some frequency bands.
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13	13	* TTN Frequency Band Settings: [[https:~~/~~/www.thethingsnetwork.org/docs/lorawan/frequency-plans.html>>url:https://www.thethingsnetwork.org/docs/lorawan/frequency-plans.html]]
14	14	* Frequency Bands vs Country List : Page 11 of [[LoRaWAN Regional Parameters RP2-1.0.3>>url:https://resources.lora-alliance.org/technical-specifications/rp2-1-0-3-lorawan-regional-parameters]]
15	15
16		-
17		-
18	18	= 2. OTAA Join Behaviour =
19	19
20	20	For 005 LoRaWAN stack: to save battery, once boot, device will make first make 200 tries for OTAA Join, the time period of two Join Requests will depends on the DR and the airtime requirement. After this 200 Join finish, device will send a join request every 20 minutes. If device reboot, it will do above loop again.
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26	26	* EU868 OTAA Join DR select. SF7->SF8->SF9->SF10->SF11->SF12; Each 3 attempts and then loop
27	27	* US915 and AU915 OTAA Join procedure,. End node by default will use all 72 channels to join and it will be set to use the proper sub-band after Join success
28	28
29		-
30		-
31	31	= 3. Default Frequency Bands =
32	32
33	33
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44	44	)))
45	45
46	46
	40	+
47	47	=== 3.1.2 AS920-923 & AS923-925 : AS923-1 (AS923) ===
48	48
49	49	* Default Uplink channel:
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71	71	** Uplink channels 1-8 (RX1)
72	72	** 923.2 - SF10BW125 (RX2)
73	73
74		-
75		-
76	76	=== 3.1.3 AS923-2 ===
77	77
78	78	* Default Uplink channel:
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134	134	** 927.5 - SF7BW500 to SF12BW500
135	135	** 923.3 - SF12BW500(RX2 downlink only)
136	136
137		-(((
138	138	There is a issue if the end node is fixed at sub-band2. The sensor won't be able to register to other sub-band and can only works for the LoRaWAN server use sub-band2 , such as TTN. To solve this, user need to use a USB-TTL adapter to connect to the end node to manually set the sub-band which is very inconvinient.
139		-)))
140	140
141		-
142		-(((
143	143	So since **Since [[Dragino DLS-005 LoRaWAN Stack>>url:https://www.dragino.com/downloads/downloads/LoRa_End_Node/DR-LWS/changelog]]**, To make sure the end node supports all sub band by default. In the OTAA Join process, the end node will use frequency 1 from sub-band1, then frequency 1 from sub-band2, then frequency 1 from sub-band3, etc to process the OTAA join.
144		-)))
145	145
146		-
147		-(((
148	148	After Join success, the end node will switch to the correct sub band by:
149		-)))
150	150
151		-* (((
152		-Check what sub-band the LoRaWAN server ask from the OTAA Join Accept message and switch to that sub-band
153		-)))
154		-* (((
155		-Use the Join successful sub-band if the server doesn’t include sub-band info in the OTAA Join Accept message ( TTN v2 doesn't include)
	135	+* Check what sub-band the LoRaWAN server ask from the OTAA Join Accept message and switch to that sub-band
	136	+* Use the Join successful sub-band if the server doesn’t include sub-band info in the OTAA Join Accept message ( TTN v2 doesn't include)
156	156
157		-
158		-)))
159		-
160	160	== 3.3 CN470-510 (CN470) ==
161	161
162	162	Used in China, Default use CHE=1
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248	248
249	249	== 3.8 MA869 ==
250	250
251		- Country: Morroco
252		-
253	253	* Uplink:
254	254	** 869.1 - SF7BW125 to SF12BW125
255	255	** 869.3 - SF7BW125 to SF12BW125
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269	269
270	270	Used in USA, Canada and South America.
271	271
272		-
273	273	=== 3.9.1 Before [[Dragino DLS-005 LoRaWAN Stack>>url:https://www.dragino.com/downloads/downloads/LoRa_End_Node/DR-LWS/changelog]]. ===
274	274
275	275	Default use CHE=2, Subband 2
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314	314	)))
315	315	* (((
316	316	Use the Join successful sub-band if the server doesn't include subband info in the OTAA Join Accept message ( TTN v2 doesn't include)
317		-
318		-
319	319	)))
320	320
321	321	= 4. Frequency Bands for different server =