User Manual General introduction LoRa SX-1276 1W module is a small-sized Sub 1GHz LoRaTM SMD wireless module designed by Chengdu Ebyte, based on the original imported RF chip SX1278/SX1276 from SEMTECH, supporting LoRa Spread spectrum technology, which brings longer transmission distance and has the advantages of concentrated power density and strong anti-interference. The 30dBm module with PA(power amplifier) and low-noise amplifier enhanced the communication stability and communication distance; The 20dBm module integrated the industrial crystal oscillator, accuracy is less than 10ppm, with stable batch production, and widely used for utilities, IOT transformation and smart home, The related RF parameters can get through the domestic and overseas certification, such as FCC, CE, RoHs etc., satisfying export demand. Model No. RF IC Frequency Operating Transmitting Power Communication distance Packaging Antenna type LoRa SX-1276 1W module SX1276 902~928 MHz dBm 30 km 10.0 SMD Stamp hole
/IPEX LoRa SX-1276 1W module series module is a hardware platform. Without any program, users need to conduct the secondary development. Copyright 20122017Chengdu Ebyte Electronic Technology Co.,Ltd 1 SX127X RF Module User Manual of E19 Series Modules Contents GENERAL INTRODUCTION ................................................................................................................................................................ 1 1. TECHNICAL PARAMETERS ...................................................................................................................................................... 3 1.1 GENERAL PARAMETERS ......................................................................................................................................................................................... 3 1.2 ELECTRICAL PARAMETERS ..................................................................................................................................................................................... 3 1.2.1 Transmitting current ................................................................................................................................................................................ 3 1.2.2 Receiving current ...................................................................................................................................................................................... 3 1.2.3 Turn-off current ........................................................................................................................................................................................ 3 1.2.4 Supply voltage ........................................................................................................................................................................................... 3 1.2.5 Communication level ............................................................................................................................................................................... 4 1.3 RF PARAMETERS ................................................................................................................................................................................................... 4 1.3.1 Transmitting Power .................................................................................................................................................................................. 4 1.3.2 Receiving sensitivity ................................................................................................................................................................................. 4 1.3.3 Recommended Frequency ..................................................................................................................................................................... 4 1.4 TESTED DISTANCE ................................................................................................................................................................................................. 5 2. PIN DEFINITION ................................................................................................................................................................................. 5 3.USAGE ..................................................................................................................................................................................................... 6 4. REMARK .......................................................................................................................................................................................... 6 5. PRODUCTION GUIDANCE .............................................................................................................................................................. 7 5.1 REFLOW TEMPERATURE ........................................................................................................................................................................................ 7 5.2 REFLOW GRAPH .................................................................................................................................................................................................... 7 6. FAQ .......................................................................................................................................................................................................... 7 6.1 THE COMMUNICATION DISTANCE IS TOO CLOSE ................................................................................................................................................ 7 6.2 THE MODULE CAN BE DAMAGED EASILY .............................................................................................................................................................. 8 7. IMPORTANT STATEMENT .............................................................................................................................................................. 8 8.ABOUT US .............................................................................................................................................................................................. 9 Copyright 20122017Chengdu Ebyte Electronic Technology Co.,Ltd 2 1. Technical parameters 1.1 General parameters Model No. IC Size Net WT Operating temp. Operating humidity Storage temp. LoRa SX-1276 1W module SX1276 25.0*40.0 mm 5.20.1g
-40 ~ 85 10% ~ 90%
-40 ~ 125C 1.2 Electrical parameters 1.2.1 Transmitting current Model No. Min Typ Max Unit Remark LoRa SX-1276 1W module 570.4 620.0 682.0 mA When designing current supply circuit, 30% margin is recommended to be remained so as to ensure long-term stable operation of the whole module;
The current at the instant of transmitting may be high, but the total energy consumed may be lower due to very short transmitting time;
When using external antenna, the impedance matching degree at different frequency points between antenna and module may affect the transmitting current value at 1.2.2 Receiving current Model No. Min Typ Max Unit Remark different levels. LoRa SX-1276 1W module 21.2 23.0 25.3 mA The current consumed when the RF chip is only working at receiving mode is called as receiving currentthe tested receiving current may be higher for some RF chips with communication protocol or the developers have loaded their own protocol to the whole module. The current at pure receiving mode will be mA level, the users have to realize A level receiving current through firmware development. 1.2.3 Turn-off current Model No. Min Typ Max Unit Remark LoRa SX-1276 1W module 1.5 3.0 4.5 A The turn-off current means the current consumed when CPU, RAM, Clock and some registers remain operating while SoC is at very low power consumption status. The turn-off current is always lower than the current consumed when the power supply source of the whole module is at no-load status. 1.2.4 Supply voltage Model No. Min Typ Max Unit Remark Copyright 20122017Chengdu Ebyte Electronic Technology Co.,Ltd 3 SX127X RF Module User Manual of E19 Series Modules LoRa SX-1276 1W module 3.3 3.5 5.5 V DC If the voltage is at maximum value for long time, the module may be damaged;
The power supply pin has certain surge-resistance ability, but the potential pulse higher than the maximum power supply voltage;
The power supply voltage is recommended to be higher than 3.0V, if the voltage is lower than 3.0V, the RF parameters will be affected at different degrees. 1.2.5 Communication level Model No. Min Typ Max Unit Remark LoRa SX-1276 1W module 1.8 3.3 3.6 V DC Although the communication level can be switched with If the communication level is higher than the allowed maximum value, the module may be damaged;
various methods, the power consumption of the whole module will be affected at great degree. 1.3 RF parameters 1.3.1 Transmitting Power Model No. Min Typ Max Unit Remark LoRa SX-1276 1W module Due to the error of the materials, each LRC component has 0.1% error, so error accumulation will occur since multiple LRC components are used in the whole RF circuit, and the transmitting currents will be different at different modules;
29.6 30.0 30.5 dBm The power consumption can be lowered by lowering the transmitting power, but the efficiency of the internal PA will be decreased by lowering transmitting power due to various reasons;
The transmitting power will be lowered by lowering the power supply voltage. 1.3.2 Receiving sensitivity Model No. Min Typ Max Unit Remark LoRa SX-1276 1W module The current sensitivity is tested under the Coding rate of 4/5 and spread spectrum factor of 12 Due to the error of the materials, each LRC component has 0.1% error, so error accumulation will occur since
-147.2
-148.0
-149.2 dBm multiple LRC components are used in the whole RF circuit, and the transmitting currents will be different at different modules;
The receiving sensitivity will be reduced and range will be shortened while increasing the air data rate. 1.3.3 Recommended Frequency Model No Min Typ Max Unit Remark Copyright 20122017Chengdu Ebyte Electronic Technology Co.,Ltd 4 SX127X RF Module User Manual of E19 Series Modules LoRa SX-1276 1W module 900.0 915.0 931.0 MHz It ensures that the performance of the module can reach the standard if it works in recommended operating frequency. It is recommended to avoid the crowded frequencies, such as 433.0MHz, 868.0MHz, 915MHz and other integer frequencies. 1.4 Tested distance Model No Min Typ Max Unit Remark LoRa SX-1276 1W module The external antenna used is of 5dBi gain and vertical polarization;
The interval between each data packet is 2s, sending 100 packets with 30 bytes in each packet, the range at data lose 9000 10000 11000 m rate of lower than 5% is valid range;
In order to obtain meaningful and reproduceable results, we conducted the tests under in clear weather with little electromagnetic interference at suburb areas Distance may be shorter with interference or obstacles. 2. Pin definition 2.1.2 LoRa SX-1276 1W module Pin No. Name Direction Usage 1 2 3 4 5 6 GND DIO5 DIO4 DIO3 DIO2 DIO1 Ground electrode, connected to the power reference ground. Input/Output Configurable IO portPlease find more on SX127X datasheet. Input/Output Configurable IO portPlease find more on SX127X datasheet Input/Output Configurable IO portPlease find more on SX127X datasheet Input/Output Configurable IO portPlease find more on SX127X datasheet Input/Output Configurable IO portPlease find more on SX127X datasheet Copyright 20122017Chengdu Ebyte Electronic Technology Co.,Ltd 5 SX127X RF Module User Manual of E19 Series Modules 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 DIO0 Input/Output Configurable IO portPlease find more on SX127X datasheet RST GND GND VCC SCK MISO MOSI NSS Input Input Output Input Input TXEN Input RXEN Input GND ANT GND GND Reset Configurable IO portPlease find more on SX127X datasheet Configurable IO portPlease find more on SX127X datasheet Power supply: 4.75~5.5V (Ceramic filter capacitor is advised to add) SPI clock Master output slave input Master input slave output Chip select Radio frequency switch control, make sure the TXEN pin is in high level, RXEN pin is in low level when transmitting. Radio frequency switch control, Make sure the RXEN pin is in high level ,TXEN pin is in low level when receiving. Ground electrode, connected to the power reference ground Antenna Ground electrode, connected to the power reference ground Ground electrode, connected to the power reference ground Please find more on SX127X6 datasheet from SEMTECH 3.Usage Brief introduction of connection between module and MCU (STM8L) 4. Remark DIO0DIO1DIO2DIO3DIO4DIO5 is generally purpose I/O, can be configured into multiple function,please check SX1278/SX1276 manual for more details, floating is allowed. RST, TXEN, RXEN pin must be connected, in which RST control the reset of chip, TXEN, RXEN pin control RF switch. Copyright 20122017Chengdu Ebyte Electronic Technology Co.,Ltd 6 SX127X RF Module User Manual of E19 Series Modules Make sure the grounding is good, with low power ripple, also should increase filter capacitor and as close as possible to the VCC and GND pins. SPI communication rate should not be set too high, usually around 1M Make sure TXEN pin is high level, RXEN pin is low level when transmitting;
make sure RXEN pin is high level, TXEN pin is low level when receiving;
make sure TXENRXEN pin is low level before turning off. The register configuration can be reinitialized to obtain higher stability when the chip is invalid. 5. Production Guidance 5.1 Reflow Temperature Preheating zoneMaximum temperature rise is 2.5/s Insulation zonetemperature: 150~190time: 60~90sMaximum temperature rise is 2.5/s Recirculation zoneMaximum temperature is 235~245Above 217, the time will be 40~80s Cooling zoneMaximum cooling is 4/s. 5.2 Reflow Graph 6. FAQ 6.1 The communication distance is too close When theres straight Communication barrier, the communication distance will be reduced accordingly. Temperature, humidity and same frequency interference will increase the rate of communication packet loss. Ground absorption, reflected radio waves, and closing to ground will lead to poor test result. Sea water has a strong ability to absorb radio waves, so test near the sea is not recommended . If antennas surrounded by metal items or placed in metal shell, the signal will be weakened badly. Power register is set wrongly or air data rate too high.(The higher the air data rate, the closer the distance. In room temperature, the power voltage will be less than 2.5V. The lower the the power voltage, the smaller the power. The antenna is unmatched to the module or the quality of antenna. Copyright 20122017Chengdu Ebyte Electronic Technology Co.,Ltd 7 SX127X RF Module User Manual of E19 Series Modules 6.2 The module can be damaged easily Please check the power supply, which should be 1.8v-3.8v. If the value exceeds that, the module will be damaged. Please check the stability of power supply. The voltage cannot be in fluctuations frequently. Please ensure all the installation operations are anti-static. Please ensure the humidity in the procedure of installation and operation should not be too high because some electrical parts are humidity sensitive device. Please do not use it in a too high or too low temperature environment if theres no special requirement. 7. Important statement Ebyte reserves the rights of final interpretation and revision for all the involved contents in this manual. With the continuous improvement of hardware and software, this manual may subject to change without notice. Please refer to the latest version. Users can follow the product news on our official website so as to gain the latest information. FCC Caution This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
-Reorient or relocate the receiving antenna.
-Increase the separation between the equipment and receiver.
-Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
-Consult the dealer or an experienced radio/TV technician for help. Integration instructions for host product manufacturers according to KDB 996369 D03 OEM Manual v01 2.2 List of applicable FCC rules CFR 47 FCC PART 15 SUBPART C has been investigated. It is applicable to the modular transmitter 2.3 Specific operational use conditions This module is stand-alone modular. If the end product will involve the Multiple simultaneously transmitting condition or different operational conditions for a stand-alone modular transmitter in a host, host manufacturer have to consult with module man 2.4 Limited module procedures Not applicable 2.5 Trace antenna designs Not applicable Copyright 20122017Chengdu Ebyte Electronic Technology Co.,Ltd 8 SX127X RF Module User Manual of E19 Series Modules 2.6 RF exposure considerations This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator & your body. 2.7 Antennas This radio transmitter Y8E-VM-LORA has been approved by Federal Communications Commission to operate with the antenna types listed below, with the maximum permissible gain indicated. Antenna types not included in this list that have a gain greater than the maximum gain indicated for any type listed are strictly prohibited for use with this device. Antenna No. Operate frequency band Antenna Type Maximum antenna gain Antenna 1 902-928MHz External Antenna 1.5dBi 2.8 Label and compliance information The final end product must be labeled in a visible area with the following" Contains FCC ID:Y8E-VM-LORA". 2.9 Information on test modes and additional testing requirements Host manufacturer is strongly recommended to confirm compliance with FCC requirements for the transmitter when the module is installed in the host. 2.10 Additional testing, Part 15 Subpart B disclaimer Host manufacturer is responsible for compliance of the host system with module installed with all other applicable requirements for the system such as Part 15 B. 8. About US Technical support: support@cdebyte.com Documents and RF Setting download link: www.cdebyte.com/en/
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