User manual
Confidential, the whole present document is the sole property of Maestro Wireless Solution Ltd.
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13.2.2. AT+ADCATLMT command
This command is to set high and low limit of AI triggered AT command. Please note these two values will be
“synchronized” with the HL and LL or the AI Command String service (see Chapter 12.7). So changing the values by this
command will also change the corresponding Command String values at the same time.
Command Syntax
AT+IOAT= (<LLimit>,<HLimit>)
Response syntax:
+SMSAT: <action>,<dir>,<Threshold>,<cmd>
Command
Possible responses:
AT+ADCATLMT=0,1000
OK
Note : AI low limit to 0, high limit to 1000
AT+ ADCATLMT?
+ADCAT:0,1000
OK
Note display current status
AT+ ADCATLMT=?
+ADCATLMT : (0-5000),(0-5000)
OK
Note : possible argument
Defined Values:
<LLimit>
Low limit of AI voltage, unit is mV
Valid range is 0 to 5000, default value is 1000.
<HLimit>
High limit of AI voltage, unit is mV
Valid range is 0 to 5000, default value is 2500.
13.3. Notes and cautions to be taken when using AI triggered AT command
1 Never connect AI with voltage over the limit (5V). Input over voltage may damage the modem permanently.
2 Use only cable/metal contact designed for Molex MicroFit™ connector. Using incompatible connector will damage
the modem. Contact your dealer or Maestro Wireless Solutions if you need wire for the AI port connection.
3 The modem will NOT check the command you entered to the <cmd> field. It will be executed even it is not a valid AT
command (or even not an AT command). Check by yourself when you enter the command.
4 When triggered, the command will be executed in ‘quiet’ mode, i.e. without any response like “OK” or “ERROR” will
be sent to external application.
5 Do not enter “interactive” AT command (e.g. AT+CMGS=…), otherwise when the command is executed, the modem
will in a state of waiting further input, not to do other job.
6 Due to product limitation the modem cannot detect voltage change within period less than 100ms. If the voltage
change crossing high/low limit is done in less than 100ms this feature will not be able to detect accurately.