ARMADAS consists of a set of slave devices that obtain data via 4-20ma, analog, 12-24V digital and MODBUS from industrial grade sensors. The collected data is sent wirelessly using 433MHz radio frequency to a Master Base Station. The Master determines the polling rata of each slave by requesting data from them. All devices are made using the Atmega328P MCU.
https://www.hackster.io/yasaspeiris/armadas-wireless-data-acquisition-platform-3972a7
Pasindu Liyanage