M10 AT Commands Set
M10_ATC_V1.01 - 12 -
again.
To achieve hardware flow control, ensure that the RTS/CTS lines are present on your application
platform.
1.6 Unsolicited Result Code
A URC is a report message sent from the ME to the TE. An unsolicited result code can either be
delivered automatically when an event occurs, to reflect change in system state or as a result of a
query the ME received before, often due to occurrences of errors in executing the queries.
However, a URC is not issued as a direct response to an executed AI command, AT commands
has their own implementations to validate inputs such as “OK” or “ERROR”.
Typical URCs may be information about incoming calls, received SMS, changing temperature,
status of the battery etc. A summary of URCs is listed in Appendix A.
When sending a URC the ME activates its Ring Interrupt (Logic "l"), i.e. the line goes active low
for a few milliseconds. If an event that delivers a URC coincides with the execution of an AT
command, the URC will be output after command execution has completed.
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