M5Module-4Relay-Internal-FW Register Device addr: 0x26 10H (R/W) Relay Control Bit Default Description bit[4:7] 0000 reserved bits bit[3] 0 Relay 4 status bit[2] 0 Relay 3 status bit[1] 0 Relay 2 status bit[0] 0 Relay 1 status Note: 0 is OFF, 1 is ON