INA219 I2C DC Current and Voltage meter 3.2A Module
With this current and voltage meter you can easily measure the consumption of current.
The easy thing about this module is that it has a power meter and voltmeter in 1, so you do not need two separate modules to measure the consumption.
Vcc: 3 - 5.5V
SCL: I2C clock signal
SDA: I2C data signal
Vin-: " output" for input voltage.
Vin+: " input " for input voltage.
Uses the INA219B chip
Maximum input voltage: +26V
Maximum current: ±3.2A
Works via I2C (default address is 0x40)
Dimensions: 26 x 23mm
Pin headers and terminal are included.
The INA219B can handle high side current measuring, up to +26VDC, even though it is powered with 3 or 5V.
It will also report back that high side voltage, which is great for tracking battery life or solar panels.
A precision amplifier measures the voltage across the 0.1 ohm, 1% sense resistor. Since the amplifier maximum input difference is ±320mV this means it can measure up to ±3.2 Amps.
With the internal 12 bit ADC, the resolution at ±3.2A range is 0.8mA. With the internal gain set at the minimum of div8, the max current is ±400mA and the resolution is 0.1mA.
Advanced hackers can remove the 0.1 ohm current sense resistor and replace it with their own to change the range (say a 0.01 ohm to measure up 32 Amps with a resolution of 8mA)