# M5 Boards
M5 boards, manufactured by M5Stack (opens new window) are inexpensive, well featured boards based on ESP32.
# M5StickC and M5Stack
M5StickC and M5Stack are supported by OpenMQTTGateway and provide the following features:
# 3 low power modes
# Always ON display
The display is always ON but decrease its brightness when not processing.
# ON display when processing
The display is OFF when not processing and the ESP32 is put in low power mode.
# Always OFF display
The display is always OFF, if the board has a led, the led is used when processing.
To change the low power mode you can do it by MQTT or by pushing the middle button (btn B) of the M5Stack and the top button (btn B) of the M5Stick C
# Start screen
# Sleep screen
The screen brightness is put to a minimum so as to reduce power consumption.
# Log display in case of warning
If the gateway detects a warning or an error the sleep go out the sleep screen and show the message with a red (error) or orange (warning) background.
The M5Stick support low power mode 2 but its display is not supported for the moment.