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1	1	(% class="wikigeneratedid" id="HEndDeviceFrequencyBand" %)
2		-
	2	+ **Contents：**
3	3
4	4	{{toc/}}
5	5
	6	+
	7	+
	8	+
6	6	= 1. Introduction =
7	7
8	8	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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10	10	* TTN Frequency Band Settings: [[https:~~/~~/www.thethingsnetwork.org/docs/lorawan/frequency-plans.html>>url:https://www.thethingsnetwork.org/docs/lorawan/frequency-plans.html]]
11	11	* 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]]
12	12
	16	+
	17	+
13	13	= 2. OTAA Join Behaviour =
14	14
15	15	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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37	37	)))
38	38
39	39
40		-
41	41	=== 3.1.2 AS920-923 & AS923-925 : AS923-1 (AS923) ===
42	42
43	43	* Default Uplink channel:
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126	126	** 927.5 - SF7BW500 to SF12BW500
127	127	** 923.3 - SF12BW500(RX2 downlink only)
128	128
	133	+(((
129	129	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.
	135	+)))
130	130
	137	+
	138	+(((
131	131	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.
	140	+)))
132	132
	142	+
	143	+(((
133	133	After Join success, the end node will switch to the correct sub band by:
	145	+)))
134	134
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)
	147	+* (((
	148	+Check what sub-band the LoRaWAN server ask from the OTAA Join Accept message and switch to that sub-band
	149	+)))
	150	+* (((
	151	+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)
137	137
	153	+
	154	+)))
	155	+
138	138	== 3.3 CN470-510 (CN470) ==
139	139
140	140	Used in China, Default use CHE=1
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226	226
227	227	== 3.8 MA869 ==
228	228
	247	+ Country: Morroco
	248	+
229	229	* Uplink:
230	230	** 869.1 - SF7BW125 to SF12BW125
231	231	** 869.3 - SF7BW125 to SF12BW125
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245	245
246	246	Used in USA, Canada and South America.
247	247
	268	+
248	248	=== 3.9.1 Before [[Dragino DLS-005 LoRaWAN Stack>>url:https://www.dragino.com/downloads/downloads/LoRa_End_Node/DR-LWS/changelog]]. ===
249	249
250	250	Default use CHE=2, Subband 2
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289	289	)))
290	290	* (((
291	291	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)
	313	+
	314	+
292	292	)))
293	293
294	294	= 4. Frequency Bands for different server =