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881	881	== 4.1 ​How to change the LoRa Frequency Bands/Region? ==
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884	884	You can follow the instructions for [[how to upgrade image>>||anchor="H2.10200BFirmwareChangeLog"]].
885	885	When downloading the images, choose the required image file for download. ​
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893	893	How to set up LSE01 to work in 8 channel mode By default, the frequency bands US915, AU915, CN470 work in 72 frequencies. Many gateways are 8 channel gateways, and in this case, the OTAA join time and uplink schedule is long and unpredictable while the end node is hopping in 72 frequencies.
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901	901	You can configure the end node to work in 8 channel mode by using the AT+CHE command. The 500kHz channels are always included for OTAA.
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909	909	For example, in **US915** band, the frequency table is as below. By default, the end node will use all channels (0~~71) for OTAA Join process. After the OTAA Join, the end node will use these all channels (0~~71) to send uplink packets.
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912	912	[[image:image-20220606154726-3.png]]
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915	915	When you use the TTN network, the US915 frequency bands use are:
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917	917	* 903.9 - SF7BW125 to SF10BW125
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924	924	* 905.3 - SF7BW125 to SF10BW125
925	925	* 904.6 - SF8BW500
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928	928	Because the end node is now hopping in 72 frequency, it makes it difficult for the devices to Join the TTN network and uplink data. To solve this issue, you can access the device via the AT commands and run:
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931	931	(% class="box infomessage" %)
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938	938	**ATZ**
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942	942	to set the end node to work in 8 channel mode. The device will work in Channel 8-15 & 64-71 for OTAA, and channel 8-15 for Uplink.
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950	950	The **AU915** band is similar. Below are the AU915 Uplink Channels.
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953	953	[[image:image-20220606154825-4.png]]
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1019	1019	= 7. Packing Info =
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1024	1024	**Package Includes**:
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1032	1032	**Dimension and weight**:
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