RC-DTU-LORA868 Lora Data Transfer Unit RC-DTU-LORA868 is a wireless information transmission unit based on LoRa, which mainly uses LoRa modulation technology for data transmission. This DTU can run in two modes: - General transparent transmission mode, receiving or sending through AT instruction. - Master-slave transparent transmission mode, which can be set as Master or Slave, can interact according to Modbus protocol. Frequency Band = 868MHz Features : - Point-to-point communication protocol - Support fixed-point sending mode - Support master-slave mode - Support data encryption transmission - AT command configuration, supporting setting tools - 4000 meters transmission distance - 148dBm receiving sensitivity (10.4 kHz, SF 12) - RS232/RS485 interface - 12 - 36 VDC power supply - ESD protection (level4) - Power surge protection (level 3) - RS232/RS485 surge protection (Grade 3) - Hardware watchdog Applications: ● ● ● ● ● ● Smart meters Wireless security systems Home and Building automation 6LoWPAN systems Automatic Measure Reading Low-Power Wireless Systems Radiocontrolli s.r.l refuses any responsibility for irregular uses of the devices and for any possible lack or inaccuracy of the data and reserves the right to change in whole or in part these information without notice. Wireless Sensor Networks Remote Control Street Lights System Parking Sensors Environmental Sensors Smart Grid and Automatic Meter Reading

Radio((<ontrolli WIRELESS MODULES Radiocontrolli s.r.l refuses any responsibility for irregular uses of the devices and for any possible lack or inaccuracy of the data and reserves the right to change in whole or in part these information without notice.

Number Name Description Radiocontrolli s.r.l refuses any responsibility for irregular uses of the devices and for any possible lack or inaccuracy of the data and reserves the right to change in whole or in part these information without notice.

RC-DTU-LORA868SERIAL PORT INTERFACE The serial port of the equipment is the female port (hole), with Rs232 level (which can be directly connected to the serial port of the computer), and the pin sequence is consistent with the COM port of the computer. When connecting with the computer, it is necessary to use a cross line (2-3). A total of 3 lines are defined, and the rest are suspended. Always on after power on. LoRa data transmission indication (yellow) LoRa transmitting signal is ON LoRa data reception indication (green) LoRa received signal is ON DTU data sending indication (green) DTU transmits...

Radiocontrolli s.r.l refuses any responsibility for irregular uses of the devices and for any possible lack or inaccuracy of the data and reserves the right to change in whole or in part these information without notice.

RC-DTU-LORA868 RC-CC1101-SPI-434 FUNCTIONALITY DTU Device can work in two modality : General Transparent Transmission Mode In this mode, all actions of the DTU are controlled via AT commands. These commands tell the DTU what behavior to adopt, such as entering the receiving state or transmitting data. Master-Slave Transparent Transmission Mode In this mode, the DTU assumes two roles: master and slave. As soon as the DTU is powered on, it enters the receiving state and constantly listens for any data to receive. When it receives data, it transmits it to the RS232 and RS485 interfaces. If RS232...

RC-DTU-LORA868 GENERAL TRANSPARENT TRANSMISSION MODE The following figure illustrates the sequence diagram of the general transparent transmission mode. Two LoRa nodes, LoRa1 Node and LoRa2 Node, are used for illustration, each controlled by a user, referred to as Side 1 User and Side 2 User, respectively. Initially, Side 1 User issues an AT command to the LoRa1 Node, causing it to enter receiving mode for a duration of 5 seconds, as indicated by labels No.1 and No.2. 5.Received Hello world string 8.Send string CC.Send CE®(\| At this time, Side 2 User sends a "Hello world” string to the LoRa2...

MASTER-SLAVE TRASPARENT TRASNSMISSION MODE After entering master-slave mode, the host will wait for data on RS485 or RS232 when idle. If data is received, it will transmit it to the slave. Reset Button LoRa INIT Suppose that the following settings are made in LoRa DTU: AT+Freq=868000000 AT+SF=7 AT+BW=2 AT+CR=1 AT+Mode=1 // Set DTU to master mode. Rs232 or Rs485 incoming ? After these settings are completed, the internal process of LoRa DTU is as follows: After pressing the reset key, DTU enters continuous receiving mode after initialization. SEND DATA by RADIO (868MHz) 1) It waits for data on...

MASTER-SLAVE TRASPARENT TRASNSMISSION MODE If DTU sets the slave state in master-slave mode, when DTU is idle, it will turn on LoRa receiving mode, and it will wait for any data coming in the radio frequency. If there is any data coming in, it will send the data to the host controller via RS232 and Rs485. Suppose the following settings are made in LoRa DTU: Press the reset key to reset and make it start working. After the above settings are completed, the internal process of LoRa DTU runs as follows: After pressing the reset key, DTU will enter the receiving state after initialization. 1) When...

Radio(((ontrolli WIRELESS MODULES The AT commands are used to drive the LoRa module and to send data. AT commands are sent through the UART peripheral. Serial Port parameters: • Parity: none • Flow control: none AT command is based on ASCII code. Radiocontrolli s.r.l refuses any responsibility for irregular uses of the devices and for any possible lack or inaccuracy of the data and reserves the right to change in whole or in part these information without

Radio(((ontrolli WIRELESS MODULES AT COMMAND (Basic Instruction) When a specific state occurs, the module will issue an Event on its own. The events are shown in the table below : Radiocontrolli s.r.l refuses any responsibility for irregular uses of the devices and for any possible lack or inaccuracy of the data and reserves the right to change in whole or in part these information without notice.