Semtech SX1276 radio transceiver supporting LoRa High sensitivity down to ‐135.5 dBm 902.3MHz to 914.9 MHz (125 kHz) 903.0MHz to 914.2 MHz (500 kHz) Max 14 dBM Output Power LoRa Alliance Certified UART Communication Interface AT‐Command set support for LoRaWAN SMA connector Compatible with 3.3V/5V I/O Arduino Type Host Board 5V I/O Arduino Connectors Grove Connectors 3 | 24 eLR100-UL-00 Manual for Consumer Products, Rev. 0.2, 02/2020...
Contetns 2.2. POWER Figure 5. Input Power, Power LED 2.2.1. Input Power Inputs from the power source enter power through Pin 5 and 6 in the Arduino Headpin Interface (JA1). Pin 2(IREF) requires the Level Shift (U3) to be supplied as a pin for V5 power. 2.2.2. Power LED (LED1) LED1 illuminates when an external power supply of 5V is applied and 3.3V is output normally via a circuit on the board. 6 | 24 eLR100-UL-00 Manual for Consumer Products, Rev. 0.2, 02/2020...
Contetns 2.3. RESET Figure 6. Reset Header, Switch 2.3.1. LoRa Module (eLR100‐UL‐00) Reset (SW1) There are 3 ways to reset the LoRa module (eLR100‐UL‐00). Rress SW1, applying a reset signal (Low Active) through the Socket Header (D7), or Sending software Reset via AT‐Command via UART. Hardware Reset LoRa Module (eLR100‐UL‐00) Reset I/O is available for both 3.3V/5V. Software Reset UART enables reset by entering AT+Command 'AT+RESET'. For more information, please refer to the separate ATCOMMAND_Manual technical details. 7 | 24 eLR100-UL-00 Manual for Consumer Products, Rev. 0.2, 02/2020...
Contetns 2.4. ARDUINO TYPE HEADER GROVE CONNECTOR Figure 7. Arduino Type Header Description 2.4.1. D2 , D3 : UART (out / in) Header communicating with Arduino (UNO ). AT‐COMMAND, Debug, Firmware Update are all possble. 5V I/O. 2.4.2. D4 : State (Out) Header pin to check the status of LoRa Module (eLR100‐UL‐00). Normal Mode : HIGH Sleep Mode : LOW 8 | 24 eLR100-UL-00 Manual for Consumer Products, Rev. 0.2, 02/2020...
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Contetns 5V I/O. Connect with LED2 to check signal status. Normal Mode : ON Sleep Mode : OFF 2.4.3. D7 : LoRa Reset (IN) Connected to the Reset of the LoRa Module (eLR100‐UL‐00). The PNP TR is connected inside the eLR100‐AD‐SU, which allows control of all 3.3V/5V. 2.4.4. Grove Connector The A0, A1 D8, D9 SCL, and SDA signal lines are not connected to the LoRa Module (eLR100‐UL‐00) but directly to the Grove Connector in the Arduino Header. 9 | 24 eLR100-UL-00 Manual for Consumer Products, Rev. 0.2, 02/2020...
3.1. FIRMWARE UPLOAD 3.1.1. Board Setting Figure 8. Boot Mode Jumper in Boot Mode Header (J1) to set the Firmware Upload Mode. Table 1 Jumper Setting Mode Jumper Setting Description Default Mode Normal Operation Mode (ROM BOOT) Firmware Upload Mode Firmware Update Mode (UART to Flash Boot) Connect a 5V power supply to the Arduino Header. Connect a 5V power supply to the IOFF as well. Connect the Uart cable to D0,D1 of the Arduino Header. Press LoRa Reset Switch (SW1) to reset. 10 | 24 eLR100-UL-00 Manual for Consumer Products, Rev. 0.2, 02/2020...
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Contetns Perform Firmware Upload. 3.1.2. Firmware Updater Setting & Upload Figure 9. Firmware Setting 1 With the eLR100‐AD‐SU connected to your PC, click Scan. Set COM Port to the port to which the eLR100‐AD‐SU is connected. Select QSPI.. Click ... to select the .img file to upload. Figure 10. Firmware Setting 2 Click Connect. Click Upload. Check the Upload status through the green bar. Figure 11. Firmware Setting 3 “Firmware Upload Success !” Confirm the message and click it. After upload, return the Board settings to their default values. 11 | 24 eLR100-UL-00 Manual for Consumer Products, Rev. 0.2, 02/2020...
Arduino Library works only on Arduino UNOs. To install the eWBM LoRa Library, download the files that are being distributed. Please refer to our homepage for the file. (http://www.e‐wbm.com/) 3.2.1. Installing the Arduino Library (Importing) Run Arduino IDE From the menu, access and select Sketch ‐ Include Library ‐ Add. ZIP Library. Select a deployed .ZIP file.. For more information, see Link below. https://www.arduino.cc/en/Guide/Libraries#toc4 3.2.2. Running the Arduino Example After running the Arduino IDE, access and select Tools ‐ard Board ‐> Arduino UNO order from the menu. Select File ‐> Extensions ‐> eWBM LoRa ‐> LoRa ‐> LoRaCommunication from the menu after running the Arduino IDE. 12 | 24 eLR100-UL-00 Manual for Consumer Products, Rev. 0.2, 02/2020...
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Contetns 3.2.3. Upload the Program Connect the USB cable. Figure 12. Arduino Port From the Arduino IDE menu, access and select Tools ‐> Board ‐> Arduino UNO order. From the Arduino IDE menu, select Tools ‐> Port to select the port you connected to. Upload. 13 | 24 eLR100-UL-00 Manual for Consumer Products, Rev. 0.2, 02/2020...
Parity bit: None LoRaCommunication.ino example If you appear in the Console as shown below during the initial run, it is normal. LoRa Network Start LoRa Module Version : 1.1.15‐e07713e‐Darthvader LoRa Device EUI : 02:02:02:02:02:02:02:02 Select Lora Mode : OTAA (1) or ABP (2) ? Figure 14. LoRa Command LoRa motion mode must be selected and operated in either OTAA or ABP mode.. Choose according to the purpose and join LoRaWAN. For more information on LoRa, please refer to the LoRaWAN Specification document. 3.3.1. LoRa Preferences Refer to the AT‐COMMAND command manual for detailed settings. If the module does not succeed with Join, check the communication with the Gateway and check the Network Server. The initial Class setting for the module is set to Class A. 14 | 24 eLR100-UL-00 Manual for Consumer Products, Rev. 0.2, 02/2020...
Contetns 4.3. ANTENNA Please perform the antenna design that followed the specifications of the antenna About the signal line between an antenna and a module It is a 50‐ohm line design. (SMA Reverse) Fine tuning of return loss etc. can be performed using a matching network. However, it is required to check "Class1 change" and "Class2 change" which the authorities define then. The concrete contents of a check are the following three points. 1) It is the same type as the antenna type of antenna specifications. 2) An antenna gain is lower than a gain given in antenna specifications. 3) The emission level is not getting worse. 4.3.1. Antenna gain Figure 16. Antenna Specification 17 | 24 eLR100-UL-00 Manual for Consumer Products, Rev. 0.2, 02/2020...
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Part Number Reference Description Manufacture LQP03TN10NH02D R10 10nH, 3% Murata SMA, Subminiature Coaxial SMA‐4R‐PCB(1.8T) J2 Sungjin Connector 50 ohm N/A C6, C7 Not Installed N/A Table 1. Antenna Micro‐strip Trace Parts 18 | 24 eLR100-UL-00 Manual for Consumer Products, Rev. 0.2, 02/2020...
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Contetns 4.3.3 PCB Stack‐Up and Trace PCB Stack up for the reference board: Figure 18. PCB Stack‐Up Below figure 18 shows the Top layer routing of the complete reference board. 19 | 24 eLR100-UL-00 Manual for Consumer Products, Rev. 0.2, 02/2020...
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4.3.4 Test Procedure for ensuring compliance The below test is to be performed both at design verification stage and in production for ensuring compliance. 1. Initiate Continuous Transmission in the appropriate modulation mode from the device i.e.,902.3MHz, 908.7MHz, 914.9MHz; FHSS mode and 903MHz, 907.8MHz, 914.2MHz; DTS mode 2. Verify RF power through conducted measurement at junction J2 3. The measured Tx power should be within the datasheet specification for Transmit output power. 20 | 24 eLR100-UL-00 Manual for Consumer Products, Rev. 0.2, 02/2020...
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