Power 12V
3 relys 250VAC/30VDC 5A
4 inputs 12V
RS485
micro SD
micro USB
19 Leds
5 Serial (EPS-SIM800-RS485-Mbus-USB)
SPI + I2C
Optional:
4 + relays, total 7 outputs, only in the absence of the Ethernet module.
Ethernet module
WiFi ESP01 module
Bluetooth HC-xx module
cellular modem SIM800
M-Bus
Battery RTC
Power supply 220V 12V internal.
Bootloader for firmware loading from micro SD
OLED display 128x128 pixel