RF1276D27 Long Distance Transceiver module V4.0 1. General RF1276D27 series is a low cost, ultra-low power, high performancetransparent two way semi-duplex LoRa modulation transceiver with operation at 902.3-914.9Mhz. It integrates with high speed MCU from ST and high performance RF IC SX1276. Adopting high efficiency forward error correction with interleaving encoding (FEC) technology, it makes anti-interference ability and reception sensitivity greatly improved.
RF1276D27 Long Distance Transceiver module V4.0 2. Features 5000 meters of communication distance（300bps） Output power: Max100mW (20dBm) (7 levels adjustable) Air data rate: 300 - 19200bps, can be configured through RF tool UART data rate: 1200 - 57600bps, can be configured through RF tool Frequency: 902.3MHz –914.9MHz Working Current: 90mA(TX), 19.2mA(RX), 22uA(wake-up), 3.
RF1276D27 Long Distance Transceiver module V4.0 4. Maximum specification Symbol Parameter Min Max Units VCC Supply Voltage 4.5 5.5 V TOT Operation Temperature -30 85 ℃ HOH Operation Humidity 10% 90% TST Storage Temperature -55 125 °C 5. Pin Out: RF1276D27 module has 7 pins. Refers to the Table 1： RF1276D27 Pin NO. Pin Name Function Description 1 GND Ground Groundingof Power Supply 2 VCC Power Power supply DC 4.5V-6.
RF1276D27 Long Distance Transceiver module V4.0 6. Working mode a. Standard mode Standard mode is also called transparent mode in which the module receives from or sends data to the host through serial port (RS232 or RS485) at preset data format and users don’t need to care about the proce ss of data inside the module. The AUX pin of RF1276D27 will give indication about the data IN/OUT of serial port 2ms in advance in order to wake up the host. Timing Sequence in Standard Mode b.
RF1276D27 Long Distance Transceiver module V4.0 E.g. The Central module sends data‘0x00 0x01 0x22 0x33 0x44 0x55’, all of the node modules with ID ‘0x00 0x00’ will receive the data ‘0x00 0x01 0x22 0x33 0x44 0x55’. If the ID of node module is larger than 0x00 0x00, the node module with ID the same as the one in the first two bytes of data package can receive the real data. E.g.
RF1276D27 Long Distance Transceiver module V4.0 The logic level of SET pin is used to switch between express communicationand breath period communication in central/node mode. In sleep mode, theSET pin should be connected to logic high or suspended. If the SET pin is set to high, the node module willkeeps CAD wireless monitor to detect if there is any wireless signal coming at the interval ofthe breath period.
RF1276D27 Long Distance Transceiver module V4.0 Figure 1:Size of Module 8. Parameter Configuration Through serial portor usingsetting tool ‘Rf-Tool’, users can configure relative parameters such asfrequency, UART rate, air rate, checkout mode and so on. It is very simply forconfiguration. Based on different requirement, all options can be selected visually. It is shownin Table 2 and Figure 3. -7- Parameter Description UART area The values are fixed at 9.6k bps & no parity check.
RF1276D27 Long Distance Transceiver module V4.0 Node ID It is available in the Central/Node mode. Net ID Only the modules with the same network ID can communicate with each other. It can avoid interferences from irrelative modules Power It is used to set the output power of RF1276D27. There are 7 power levels. The 7 means the max. output power---20dBm and 0 means the lowest output power.
RF1276D27 Long Distance Transceiver module V4.0 Users can configure the parameters (frequency, data rate, output power, RF Factor, RF Bandwith etc.) through PC or in circuit. ♦Setting through PC.RF1276D27port is UART/TTL. When RF1276D27connecting with PC, users need to use USB adapter. AppconWireless provides USB adapteras accessory. The schematic is shown in Figure 4 Firstly users connect converter board to PC through DB9 cable and open ‘RF Tool’, theninsert module into converter board.
RF1276D27 Long Distance Transceiver module V4.0 Sync word 0xAF 0xAF ID code 0x00 0x00 Header Command 0XAF XX YY Length Data CRC End code LEN XXXX CS 0X0D 0X0A RF1276D27 Command Structure Notes: 1. The ID code is 0x00 0x00 in command. 2. In command code, XX in sending command is 0x80 and in response command is 0x00. YY is the command type.
RF1276D27 Long Distance Transceiver module V4.0 Serial Baudrate Kbps 1 Parity 1 1.2, 2.4, 4.8, 9.6, 19.2, 38.4, 57.6 equals to 1,2,3,4,5,6,7 0: No parity; 1: Odd parity; 2: Even parity The value=Frequency/61.035. E.g. For 433MHz, the value= 433000000/61.035 7=128, 8=256, 9=512, 10=1024, 11=2048, 12=4096 Freq. KHz 3 RF_Factor Chips 1 RF_BW Kbs 1 6=62.
RF1276D27 Long Distance Transceiver module V4.0 Central Mode Command Code: 0x04 Command: 0xAF, 0xAF, 0x00, 0x00, 0xAF, 0x80, 0x04, 0x02, 0x00, 0x00, 0x93, 0x0D, 0x0A Response.: 0xAF, 0xAF, 0x00, 0x00, 0xAF, 0x00, 0x04, 0x02, 0x00, 0x00, 0x93, 0x0D, 0x0A Node Mode Command Code: 0x05 Command: 0xAF, 0xAF, 0x00, 0x00, 0xAF, 0x80, 0x05, 0x02, 0x00, 0x00, 0x94, 0x0D, 0x0A Response.
RF1276D27 Long Distance Transceiver module V4.0 Caution:1. When RF1276D27is installed, make sure the antenna is far away from device to enhance the performance. 2. RF1276D27 should have the same common ground with MCU or terminal. Otherwise it may cause the module irregular working. 3. When RF1276D27 works normal, DO NOT touch the module and antenna. Figure 7: Connection between Module and Device (TTL/UART port) 10.
RF1276D27 Long Distance Transceiver module V4.0 NOThigher than 60 percent of the air rate. For instance, the UART rate is 9600bps, the air rate is 4800bps.If UART rate is the same as the air rate, the only way is to interval the transmitting time. If terminal transmits 100bytes to UART every time, it will take 104ms every time. (104ms/0.6)*(9600/4800)=347ms. So if the interval time that terminal transmit 100bytes to UART should NOT less than 347ms every time, those mentioned problems can be avoided.
RF1276D27 Long Distance Transceiver module V4.0 11. Q&A: Questions and Answers Can not 1．The communication protocol is different between two modules, for communicate instance: data rate and checkout. between two 2．The frequency or RF data rate is different between two communicated devices modules. 3．They are not the same kind products. 4．The connection between module and terminal is wrong. 5、The module is wrong. 6．The setting of EN is wrong.
FCC Regulatory notices Modification statement APPCON WIRELESS TECHNOLOGY LIMITED has not approved any changes or modifications to this device by the user. Any changes or modifications could void the user’s authority to operate the equipment. Interference statement This device complies with Part 15 of the FCC Rules and Industry Canada licence-exempt RSS standard(s).
Model: RF1276D27 Contains FCC ID：2APJJ-RF1276D27 The host OEM user manual must also contain clear instructions on how end users canfind and/or access the module and the FCC ID and ISED. Model: RF1276D27 Contains FCC ID： 2APJJ-RF1276D27 OEM Statement a. The module manufacturer must show how compliance can be demonstrated only for specific host or hosts b. The module manufacturer must limit the applicable operating conditions in which t transmitter will be used, and c.
2.2 List of applicable FCC rules List the FCC rules that are applicable to the modular transmitter. These are the rules that specifically establish the bands of operation, the power, spurious emissions, and operating fundamental frequencies. DO NOT list compliance to unintentional-radiator rules (Part 15 Subpart B) since that is not a condition of a module grant that is extended to a host manufacturer. See also Section 2.
2.5 Trace antenna designs For a modular transmitter with trace antenna designs, see the guidance in Question 11 of KDB Publication 996369 D02 FAQ – Modules for Micro-Strip Antennas and traces. The integration information shall include for the TCB review the integration instructions for the following aspects: layout of trace design, parts list (BOM), antenna, connectors, and isolation requirements.4 a) Information that includes permitted variances (e.g.
2.8 Label and compliance information Grantees are responsible for the continued compliance of their modules to the FCC rules. This includes advising host product manufacturers that they need to provide a physical or e-label stating “Contains FCC ID” with their finished product. See Guidelines for Labeling and User Information for RF Devices – KDB Publication 784748.
