Nodemcu Current Sensor

5 v 2 amp power supply to nodemcu cell phone charger works.

Nodemcu current sensor.

385 watt 1 687 a voltage 228 sensor max 422 rises to 423 sometimes the amplitude of the current is in ma 4394 5 the effective value of the current is in ma 3107 9. The non invasive ac current sensor is a current transformer can be clamped around the supply line of an electrical load to measure the current. With power usage according to power consumption meter. By reading the amount of current being produced by the coil the current passing through the conductor can be calculated.

Datapin of sensor to a0 analog pin. Connect vcc of sensor to 3 3v on nodemcu. This sensor is most commonly used as the air quality monitor. Acs712 current sensor i have got 5amp sensor 185 mv sensitivity.

Nodemcu is a tiny device it works on 3 3 volts. Powering the nodemcu near the switchboard might be an issue as well so i installed a din rail power socket this will come in handy for real power measurement later on. Voltage greater than 5 volt may blow the pin or fry the nodemcu. Connecting pir sensors to a nodemcu is really simple.

It measures the current through a device or a circuit and generates an appropriate signal that is proportional to current measured. The amplitude of the current is in ma 6201 2 the effective value of the current is in ma 4385 6. In our case we want to measure 12 volt battery and nodemcu adc analog to digital channel can only accept 3 3 volts. Most pir modules have a 3 pin connection at the side or bottom.

Usually the output signal is an analog voltage. Thu jan 31 2019 3 10 pm 80355 hi is it possible to use current sensor acs 712 directly with esp8266 nodemcu board. The pir acts as a digital output so all you need to do is operate the pin to flip high detected or low not detected. Asking because acs712 gives around 5v of analog output and not sure if nodemcu can handle 5v in the analog input pin.

It does this by acting as an inductor and responding to the magnetic field around a current carrying conductor. Seeed non invasive ac current sensor 100a max. Gnd of sensor to gnd of nodemcu. Check out the images for more details.

An appliance to connect on ac load of less than 5 amp. You can use this sensor with arduino and nodemcu esp8266 wifi module. Acs712 current sensor board published by esp8265 wp on june 2 2015. Since it is working on 3 3 volts its pins can source and sunk 3 3 volts only.