YO Modbus is the bridge between the Modbus network and LoRaWAN. It allows reading data via Modbus RTU from Slave devices and sends it via LoRaWAN. With one YO Modbus device, it is possible to create up to 150 Modbus queries and send via LoRaWAN collected in up to 30 different LoRa frames. There is no limit to the number of devices to which your Modbus can send queries. The limit is only based on the number of queries. It can be powered by direct or alternating current over a wide voltage range of 6-30 VDC or 5-21 VAC respectively.