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HXC Client Module User Guide

Version 1.09

© 2017 All rights reserved. Iotek Systems, LLC

Page 37 of 59

AT_PARAM_ERROR 

AT_PARAM_ERROR 

 
US915 region: 
HXC900  supports  US915  region.  There  will  be  8  default  channels.  The  channel
configurations are shown in

section 5.4.2.1

. Users can add up to 72 channels (including

default  channels).  The  channels  are  configurable  by  group.  Each  group  represents  8
channels. For example, group-0 represents channel 0 to 7, group-1 represents channel 8
to  15  and  so  on.  There  are  total  9  groups.  All  groups  are  configurable.  You  can  also
remove  the  channels  by  group  except  group  zero  (Channel  0  to  7).  All  channel
configurations are saved in EEPROM.

The  command  takes  a  base  frequency.  The  first  channel  of  a  group  will  use  the  base
frequency  and  the  consecutive  channels’  frequency  will  be  incremented  by  200KHz.
Group 8 represents special channels (channel 64 to 71), which uses 500KHz bandwidth.
The  consecutive  channels’  frequency  of  group  8  will  be  incremented  by  1.6MHz  from
the base frequency.

Format:
Add Channel: AT+CH=<Group ID>,<Base Freq HZ>,<DRmax>,<DRmin>
Remove Channel: AT+CH=<Group ID>,0

Add or Remove Channel 

OK 

AT+CH=? 

 

 

 

// Region_US915 Default channels  

0,902300000,3,0 

1,902500000,3,0 

2,902700000,3,0 

3,902900000,3,0 

4,903100000,3,0 

5,903300000,3,0 

6,903500000,3,0 

7,903700000,3,0 

OK 

AT+CH=1,912300000,3,0 

OK 

0,902300000,3,0 

1,902500000,3,0 

2,902700000,3,0