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Q.: |
Does webOS offer an extended AT command set ? |
A.: |
No. However, to enable the standard commands, two commands must be issued:
AT+CIND=?;+PALMSMSE
webOS does not support an AT command modem via USB (CDC ACM) or Bluetooth (Dial-Up Networking; DUN) out-of-the-box. To issue AT commands, you connect to the Bluetooth service Hands-Free (HFP; UUID 0x111f). The AT commands of this service are limited to those mentioned in Bluetooth specifications. However, after issueing a standard command like AT+CIND=?, you enter a second level of commands: +CLAC shows which commands are availble now. To enable the third level of commands and to use SMS, you issue AT+PALMSMSE. The sequence above issues both commands in a row. Have a look at the final command scan.
Unfortunately, those extended commands are rather unstable. All commands have to be in upper-case characters. The whole command must be placed in the same RFComm packet. Some Terminals flush each character individually forcing the underlying Bluetooth stack to send each character individually. Although +CSCS supports only the GSM character set, the strings are UTF-8. Use the AT command interface with care, it is neither finished nor tested.
+CMGL and +CMGR do not work for me at all. SMS text-mode is default, however, garbles the destination number somehow. PDU-mode does not allow anything else than US-ASCII, no 23.038. The destination number has to be local (0177…) not in international (+49177…) format. |
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