The "U097: 4-Relay Unit" from M5Stack is a 4 relays module that can be controlled via I2C. This unit fits a Grove connector to ease the connection on Grove's compatible plateforms.
It is possible to add Grove to your favorit plateform by wiring your own connector with a Grove to Pin (or Grove to Pad).
Remarks: This driver is sourced from esp8266-upy GitHub maintained by MCHobby
First, copy the library lib/m4relay.py on your plateform. Then you can execute the examples scripts.
The test_simple.py script (visible here below) explains hos to contole the U097 relays.
from machine import I2C
from m4relay import Relays
from time import sleep
# Pico - I2C(0) - sda=GP8, scl=GP9
i2c = I2C(0)
# M5Stack core
# i2c = I2C( sda=Pin(21), scl=Pin(22) )
rel = Relays(i2c)
# The LED is controled with the Relay
# Switch all relay ON
for i in range(4): # from 1 to 3
rel.relay( i, True )
sleep( 1 )
# Switch All relay OFF
for i in range(4): # from 1 to 3
rel.relay( i, False )
sleep( 1 )The test_async.py script would allows to control :
- the LEDs with
Relays.led(index=0..3, state=True/False)and - the Relays with
Relays.relay(index=0..3, state=True/False)
... independantly from each other when LEDs and Relays are desynchronized with ( Relays.synchronize( False ) ).