It does not matter to the current sensor where the power comes from.
However, neither USB nor the Arduino can safely power a GSM module, which will typically consume 2 Amperes while transmitting. You will damage your circuitry if you try.
It does not matter to the current sensor where the power comes from.
However, neither USB nor the Arduino can safely power a GSM module, which will typically consume 2 Amperes while transmitting. You will damage your circuitry if you try.