M12 Hardware Design
M12_Hardware_Design_V3.3 - 54 -
Figure 36: Molex 91288 SIM card holder
Table 15: Pin description of Molex SIM card holder
SIM Card Presence Detection
Pulled down GND with external circuit. When the tray is
present, C4 is connected to C8.
3.11. ADC
The module provides two auxiliary ADC interfaces to measure the values of two analog inputs.
AT command “AT+QADC” reads the voltage value present on the ADC0 pin. AT command
“AT+QEADC” reads the voltage value present on the ADC1 pin. It is suggested that ADC0 channel
is preferred in the use of ADC channel. For details of this AT command, please refer to document
[1].
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