Crate pzem004t

An embedded-hal driver for the PZEM004T energy monitor.

The driver must be initialized by passing a Serial interface peripheral to the Pzem::new function, which in turn will create a driver instance, with the slave address specified, or the default general address for a single-slave environment 0xf8.

Examples

Examples can be found in the examples/ directory.

Read the measurements off the sensor every second

let mut pzem = pzem004t::Pzem::new(serial, None).unwrap();
let mut m = pzem004t::Measurement::default();
loop {
    match pzem.read(&mut m, Some((&mut tim, TIMEOUT))) {
        Err(e) => hprintln!("Could not read PZEM004T: {}", e).unwrap(),
        Ok(()) => {
            hprintln!("Voltage: {:.1} V", m.voltage).unwrap();
            hprintln!("Current: {:.3} A", m.current).unwrap();
            hprintln!("Power: {:.1} W", m.power).unwrap();
            hprintln!("Energy: {:.3} kWh", m.energy).unwrap();
            hprintln!("Frequency: {:.1} Hz", m.frequency).unwrap();
            hprintln!("Power factor: {:.2}", m.pf).unwrap();
            hprintln!("Alarm: {}\n", m.alarm).unwrap();
        }
    }

    tim.start(1.hz());
    block!(tim.wait()).unwrap();
}

Structs

Measurement

Measurement results stored as the 32-bit floating point variables.

NoTimeout

Empty struct to satisfy Rust’s type requirements, when using None for the timeout parameter.

Pzem

Struct representing a PZEM004T sensor connected to a serial bus.

Enums

Error

Errors which can occur when attempting to communicate with PZEM004T sensor.