AT+CIND       Indicator Control (ver. 4)
Description:  This command sets the values of phone indicators. <ind> value 0 means
              that the indicator is off (or in state which can be identified as “off”-state), 1
              means that indicator is on (or in a state which is more substantial than
              “off”-state), 2 is more substantial than 1, and so on. If the indicator is a
              simple on/off style element, it has values 0 and 1. The number of elements
              is phone specific. If the phone does not allow setting of indicators or
              phone is not currently reachable, +CME ERROR: <err> is returned. If a
              certain indicator is not writable, setting of it should be ignored. If
              parameter is empty field, indicator shall remain in the previous value.
              Test command returns pairs, where string value <descr> is a maximum 16
              character description of the indicator and compound value is the allowed
              values for the indicator. If phone is not currently reachable, +CME ERROR:
              <err> is returned.
Set command:  AT+CIND=[<ind>[,<ind>[,...]]]
Read command: AT+CIND? Displays the current [<ind>[,<ind>[,...]]] settings.
Test command: AT+CIND=? Shows if the command is supported.
Test command  +CIND: (<descr>,(list of supported <ind>s)),(<descr>,(list of supported
response:     <ind>s)),...
Parameters:
<ind>:
               <ind>                    Description
               Integer type             Value shall be in range of corresponding <descr>.
<descr>:
               <descr>                  Description
               “battchg”                Battery charge level (0-5)
               “signal”                 Signal quality (0-5)
               “batterywarning”         Battery warning (0-1)
               “chargerconnected” Charger connected (0-1)
               “service”                Service availability (0-1) (Net contact status, 1 = Net
                                        contact)
                                              137                                           August 2005
                                            Developers Guideline AT    Commands
         <descr>          Description
         “sounder”        Sounder activity (0-1) (Phone silent status, 1 =
                          phone silent)
         “message”        Message received (0-1)
         “call”           Call in progress (0-1)
         “roam”           Roaming indicator (0-1) (Home net status, 0 =
                          Home Net)
         “smsfull”        1: a short message memory storage in the MT has
                          become full
                          0: Memory locations are available
         “callsetup”      Bluetooth proprietary call set up status indicator.
                          Possible values are as follows:
                          0: Not currently in call set up
                          1: Incoming call process ongoing
                          2: Outgoing call set up is ongoing
                          3: Remote party being alerted in an outgoing call
Example: AT+CIND?
         +CIND: 2,3,1,1,1,1,1,0,0,1
         OK
         AT+CIND=?
         +CIND: (“battchg”,(0-1)),(“signal”,(0-5)),
         (“batterywarning”,(0-1)),(“chargerconnected”,(0-1)),
         (“service”,(0-1)),(“sounder”,(0-1)),(“message”,(0-1)),
         (“call”,(0-1)),(“roam”,(0-1)),(“smsfull”,(0-1))