Specifications

6.3 Analog input port
This port can be used either as a voltage input (0-5V range) or as a current input (0-20mA range).
– To setup the port as a voltage input, issue the commands: AT+WIOM=1,"GPIO19",1 then AT+WIOW="GPIO19",0.
– For a current input, issue: AT+WIOM=1,"GPIO19",1 then AT+WIOW="GPIO19",1.
To read the value of the input, use the command AT+ADC?. More information can be found in the AT commands
guide document.
6.4 RS232 auto-online mode (power saving)
When on auto-online mode, the RS232 transceiver will shut down most of its hardware, to save power, if it does not
detect a valid input for more than 100µs.
The RS232 transceiver will wake up when valid input is detected again.
By default, auto-online mode is not active. To activate it, issue AT+WIOM=1,”GPIO22”,1,0 followed by AT+WIOM=4.
This setting needs to be set once, and will be saved in memory.
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