CM4 IoT mini-server

The CM4 mini-server relay board has a RPi CM4 socket for smart-home control and industrial automation, it's the mini version of the CM4 lte-server. The mini-server smart controller supports up to 8 relay outputs and digital inputs which can be directly connected to input switches. The most important is the integrated Raspberry Pi CM4 module with relay and digital input ports connecting directly with the CM4 module GPIO's. You can use Node-Red or Home Assistant to control the relay outputs, read digital input ports and use the I2C bus extender.