easyRadio eRIC-LoRa Long Range Datasheet Features Chirped Spread Spectrum technology Pin compatible with eRIC series RF modules uFL RF connector for remote antennas Point to Point communication Half duplex transparent Serial Data Input and Output Up to 180 bytes per packet Familiar easyRadio commands Built in temperature sensor Flash firmware upgrades. New features and updates can be quickly programmed using LPRS tools Key Parameters Frequency: 868/915MHz Receiver sensitivity: down to -137dBm Product image for illustration Purposes only Multi-channel operation The easyRadio eRIC-LoRa (Long Range) RF transceiver RF Power output: up to +20dBm (100mW) Receive current consumption: 15mA module uses Chirped Spread Spectrum (CSS) modulation together with DSP (Digital Signal Processing) to achieve RSSI dynamic range: 127dB Line of Sight (LoS) range - 1km 3km plus greater range than traditional devices using OOK, FSK or GFSK modulation. User Programmable Options: In addition, sensitivity and blocking performance are Spreading factors 6: to 12 improved giving high interference immunity whilst still Error correction rate offering low power consumption. Bandwidth: 125, 250, 500kHz Over air data rates of up to 300 kbps The module is a complete sub-system that combines a high performance low power RF transceiver, a microcontroller Host Data Rate: 2.4kbps 115.2kbps and a voltage regulator. The variable spreading factor and error correction rate Key operating parameters can be changed and configured by allow the user to optimise the bandwidth to provide a balance between sensitivity (range) and data rate. sending simple text (ASCII character) commands to the module. Applications Required range is above 1km or transceiver is in poor RF location Suburban security alarms - void buildings, caravan or car storage sites, warehouses Rural security, farm buildings/equipment, livestock monitoring, remote irrigation pumps Data collection and monitoring over a wide area eRic LoRa Datasheet 1v0.docx Page 1 of 10 easyRadio Advanced eRIC-LoRa Long Range Datasheet eRIC-LoRa Transceiver The easyRadio eRIC-LoRa RF transceiver module is a complete sub-system that combines a high performance low power RF transceiver, a microcontroller and a voltage regulator. The Serial Data Input (SDI) and Serial Data Output (SDO) by default operate at the standard 19,200 Baud and two handshake lines provide optional flow control to and from the host. The easyRadio Transceiver can accept and transmit up to 180 bytes of data, which it buffers internally before transmitting in an efficient over-air code format. Any other eRIC-LoRa transceiver, within range and on the same settings, that hears the transmission will decode the message and place the recovered data within a receive buffer that can then be downloaded to the receiving host for processing and interpretation. Radio transmission and reception is bi-directional (half duplex) i.e. transmit OR receive but not simultaneously. Extra internal buffers however, allow the user to upload data while a download is in progress giving the appearance of fully duplex data flow. Block Diagram Pin/Pad Description Pad No Name Description Notes 1 GPIO General Purpose digital I/O 2 Busy Clear to Send (CTS) function Indicates that transceiver is ready to receive serial data from the Digital output Host. Low Transceiver Ready, High Transceiver not Ready Optional A-D Input 2 GPIO General Purpose digital I/O 3 SDO Rx Serial Data Out (Default) Digital output - Connect to Host serial input 4 SDI Tx Serial Data In (Default) Digital input - Connect to Host serial output 5 Host Ready Request to Send (RTS) Used to indicate that Host is ready to receive serial data from the function Digital input Transceiver Low Host Ready, High Host Not Ready Weak (35k) pull down enabled. Optional A-D Input 6 Vcc Operating Supply Voltage +2.4V to +6V. Supply should be clean, noise and ripple free 7 Gnd Power Ground 0V Ground 8 - 22 NC Not Connnected 23 RF Gnd RF Ground 0V Connect to antenna ground and local ground plane. Internally connected to Power Ground 0V 24 RF 50R RF Input/Output Connect to suitable antenna via 50R PCB trace or use the alternative UFL connector Notes GPIO Pins/pads are configured (by default) on power up or upon Reset as Inputs with internal weak pull downs. Therefore, exercise caution when connecting to any external circuitry. Pins/Pads 1-7 are physically (pin/pad sequence) and electrically compatible with easyRadio eRA400/900 Transceivers. Interrupt function available on Pins/pad 1, 2, 3, 4, 5, 22 eRic LoRa Datasheet 1v0.docx Page 2 of 10