Relay4 Unit

4-Relay unit is an integrated 4-way relay module which can be controlled by I2C protocol. The maximum control voltage of each relay is AC-250V/DC-28V, the rated current is 10A and the instantaneous current can hold up to 16A. Each relay can be controlled independently, each on it’s own. Each relay has status (LED) indictor as well to show the state of the relay at any given time.

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Micropython Example:

# SPDX-FileCopyrightText: 2024 M5Stack Technology CO LTD
#
# SPDX-License-Identifier: MIT

import os, sys, io
import M5
from M5 import *
from unit import RelayUnit
import time


relay_0 = None


def setup():
    global relay_0

    M5.begin()
    Widgets.fillScreen(0x222222)

    relay_0 = RelayUnit((36, 26))
    print(relay_0.get_status())
    relay_0.on()
    time.sleep(1)
    relay_0.off()
    time.sleep(1)
    relay_0.set_status(True)
    time.sleep(1)


def loop():
    global relay_0
    M5.update()


if __name__ == "__main__":
    try:
        setup()
        while True:
            loop()
    except (Exception, KeyboardInterrupt) as e:
        try:
            from utility import print_error_msg

            print_error_msg(e)
        except ImportError:
            print("please update to latest firmware")