Related Manuals for Semtech SX1272
Summary of Contents for Semtech SX1272
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Page 1: User Guide
LoRaMote USER GUIDE WIRELESS, SENSING and TIMING PRODUCTS LoRaMote USER GUIDE Revision 2.0 – July 2014 Page 1 of 23 www.semtech.com ©2014 Semtech Corporation... -
Page 2: Table Of Contents
Figure 5: WiMOD Energy Profile ......................... 19 Figure 6: Power Consumption Across Time ....................20 Figure 7: Power Consumption with successful Rx ..................21 Figure 8: Power Consumption at SF12 ....................... 22 Revision 2.0 – July 2014 Page 2 of 23 www.semtech.com ©2014 Semtech Corporation... -
Page 3: Preamble
902-928 MHz North American ISM bands. Coupled with a link budget in excess of 135 dB in FSK in excess of 155 dB in LoRa, the SX1272 really offers the possibility of two modems in one single package. The SX1272 complies with both ETSI and FCC regulatory requirements and is available in a 5x5 mm QFN 28 lead free package. -
Page 4: Loramote
WIRELESS, SENSING and TIMING PRODUCTS 4 LoRaMote The LoRaMote is targeted to be a development platform for the SX1272. This idea has been to group into a single, user friendly, battery powered handheld device. While not being a real turn-key solution, the use of the WiMOD iM880A allows the software developer to re-use all the development work into another final product. -
Page 5: Figure 2: Loramote Schematics
USB or from the battery. When both a battery and the USB connector are power supplied, the switch is rendered useless and both positions will keep the LoRaMote active. Revision 2.0 – July 2014 Page 5 of 23 www.semtech.com ©2014 Semtech Corporation... -
Page 6: Imst Wimod Im880A Module
This module, the WiMOD iM880A, is fully certified and is fitted with the STM32L151C8U6 (64 KB flash + 10 KB RAM) and the SX1272. The module is clocked through the internal RC oscillator and is coming at a very low cost. -
Page 7: 868 Mhz Ism Band Pcb Antenna
This antenna has been tested and a range of over 10km has been reached with the adequate setup. For more information on the LoRa parameters allowing achieving this range, please refer to the datasheet of the SX1272. It is also possible to remove the breakable antenna and connect a standard SMA connector. This can be especially needed to perform RF testing if another antenna is required. -
Page 8: Hardware Details
MPL3115A2 pressure sensor can process sensor data locally, reducing communications required with the host processor. The MPL3115A2 is accessible through the I2C bus at the address 0x60. Please, consult Freescale website for more detailed information on the device. Revision 2.0 – July 2014 Page 8 of 23 www.semtech.com ©2014 Semtech Corporation... -
Page 9: Sar Proximity Sensor Sx9500
IOs and LEDs. The IO expander is accessible through the I2C at the address 0x3E. Please, consult the Semtech website for more detailed information on the device. -
Page 10: Loramote Demo Software
JTAG programmer. 5.1.1 Programming the LoRaMote through the JTAG connector Semtech provide an updater which can operate either with the Raisonance R-Link or with the standard STM ST-Link. In both case, the process is the following. - Page 11 This is the last point to which it is still possible to cancel the upload of a new firmware in the LoRaMote. The user is thus asked to press any key to continue or to press Ctrl-C to cancel the operation. Revision 2.0 – July 2014 Page 11 of 23 www.semtech.com ©2014 Semtech Corporation...
- Page 12 At this stage, the firmware programmed is equipped with the USB-Bootloader and it should not be necessary to do this operation again unless the code is corrupted due to wrong manipulations. Revision 2.0 – July 2014 Page 12 of 23 www.semtech.com ©2014 Semtech Corporation...
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Page 13: Programming The Loramote Through The Usb-Bootloader
If the three LEDs are not flashing, then the process must be done again as there was an issue with the detection of the finger on the sensor antenna. Revision 2.0 – July 2014 Page 13 of 23 www.semtech.com ©2014 Semtech Corporation... - Page 14 Capacitive Antenna options You can then click on “Choose” to select the file you want to program into the board. If necessary change the directory to “*\LoRaMote-eu868-fw-Updater\LoRaMote” Revision 2.0 – July 2014 Page 14 of 23 www.semtech.com ©2014 Semtech Corporation...
- Page 15 Once the file is selected, it is simply a matter of selecting the “Upgrade” button. Select Upgrade You should see a warning window from the Application but the user simply needs to click on “Yes. Revision 2.0 – July 2014 Page 15 of 23 www.semtech.com ©2014 Semtech Corporation...
- Page 16 The DfuSe Application will start with erasing the FLASH memory and then it will upgrade the firmware. Once successful, the user needs to quit the application and reboot the board. Revision 2.0 – July 2014 Page 16 of 23 www.semtech.com ©2014 Semtech Corporation...
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Page 17: Payload Format
The battery level, 1 being the minimum and 254 the maximum. This measurement is a linearized discharge function of the battery and is thus battery dependent 0xFF: The LoRaMote was not able to read the battery level Revision 2.0 – July 2014 Page 17 of 23 www.semtech.com ©2014 Semtech Corporation... -
Page 18: Per Analysis
LoRaMAC on the server side to perform the PER analysis. For more information on the sequence numbering or on any other aspect of the protocol, please refer to the LoRaMAC specifications Revision 2.0 – July 2014 Page 18 of 23 www.semtech.com ©2014 Semtech Corporation... -
Page 19: Wimod Im880A Energy Profile
For details information on the LoRa protocol, it is advised to read the LoRaMAC specifications. The principal aspect of the protocol is the opening of two reception windows after each transmission. Revision 2.0 – July 2014 Page 19 of 23 www.semtech.com ©2014 Semtech Corporation... -
Page 20: Figure 6: Power Consumption Across Time
The Rx Window 2 is opened exactly 2s after the end of the Tx if no packet was received during the first Rx Window Figure 6: Power Consumption Across Time Revision 2.0 – July 2014 Page 20 of 23 www.semtech.com ©2014 Semtech Corporation... -
Page 21: Figure 7: Power Consumption With Successful Rx
The Rx Window 2 is not present as a packet has been received Figure 7: Power Consumption with successful Rx Revision 2.0 – July 2014 Page 21 of 23 www.semtech.com ©2014 Semtech Corporation... -
Page 22: Figure 8: Power Consumption At Sf12
The difference is transmission time, and thus power consumption, is greatly reduced as the SF goes lower The same goes for the Rx Windows Figure 8: Power Consumption at SF12 Revision 2.0 – July 2014 Page 22 of 23 www.semtech.com ©2014 Semtech Corporation... - Page 23 UNDERTAKEN SOLELY AT THE CUSTOMER’S OWN RISK. Should a customer purchase or use Semtech products for any such unauthorized application, the customer shall indemnify and hold Semtech and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs damages and attorney fees which could arise.
- Page 24 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Semtech SX1272LM1BAP...
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