Wawa:
Same difference.Ok.
That's not a battery. It's a powerbank.
A battery with a boost converter that automatically turns off below a certain power draw.
What else is powered from that powerbank.
And why didn't you power the sensor from the Mega's 5volt pin.
Is the sensor some distance from the Arduino (if so, how far, and what kind of wire).Sensor ground must be connected to Arduino ground.
Your picture is not showing that.
Leo..
Only the sensors are connected to the Anker. I'm using the Anker because I want to try using an external power source.
The sensor is 2cm from the Arduino using 20 cm long jumper wires.
Connected battery negative and sensor GND to Arduino GND. No change in result.