Arduino NodeMCU SCT-013-30 current sensor

Using Arduino Microcontrollers
1

Hello everyone, need some help with the following setup:
Arduino IDE 1.8.5
SCT-013-30 Clamp-on current sensor
NodeMCU

The project involves sensing the current on a 115 VAC line.

Board powered up or reset.
Monitor current
If the current is zero amps washer is done
if the current is greater then 2 amps washer started.

The problem I am facing when the SCT-013-30 is powerup or reset it tends to send out some garbage which triggers the washer on current.
This also happens if the NodeMcu is reset.

Here is the so-called "garbage".
Current ON
16.82
Current ON
3.98

I have been experimenting with trying to write some code which allows the SCT-013 to settle to zero or a number close to zero like .03 but struggling to figure this one out. Can you help with this part of the code?

Current_Sensor_Schematic.png
Current_Sensor_Schematic.png867×711 17.8 KB

2

If your nodemcu is unmodified, the analog input voltage passes through a voltage divider making the full scale input equal to 1.0 volt. If this your situation, I believe you want R3 to be about 6 ohms and R1 = 56K.

Edit: if you've removed the divider, your R3 is selection okay but the R1/R2 pair need to be the same values to bias the midpoint at 50% of Vin Max.