User Tools

Site Tools


Sidebar

Modtronix.com
Sitemap

products:imod:inair

inAir4, inAir9 & inAir9B

This Wiki page contains additional information for the following Modtronix SX1276/SX1278 LoRa Radio boards:

  • inAir4 board - 433Mhz Module with SMA Connector
  • inAir9 board - 868Mhz and 915Mhz Module with SMA Connector, standard +14dBm power output
  • inAir9B board - 868Mhz and 915Mhz Module with SMA Connector, +20dBm high power output
  • inAir9-ufl board - 868Mhz and 915Mhz Module with U.FL Connector, standard +14dBm power output
  • inAir9B-ufl board - 868Mhz and 915Mhz Module with U.FL Connector, +20dBm high power output

See important configuration information in configuration section below! inAir9 with SMA Connector inAir9 with U.FL Connector The inAir range of boards are 433Mhz, 868Mhz and 915Mhz wireless module using the Semtech SX1276/SX1278 chips. They are available with a SMA or U.FL antenna connectors. They are part of our iMod product range.

The inAir4 board has a fixed frequency of 433MHz.

The inAir9 and inAir9B boards are configured in software for the 868Mhz or 915Mhz band, and will typically be used for the 863-870MHz or 902-928MHz ISM bands. These modules can be used for 868 and 915MHz communication. It is based on the Semtech SX1276RF1KAS and SX1276RF1IAS reference designs, which also use identical components for 868 and 915MHz. We have also confirmed with Semtech engineers that there reference design is correct. Many radio modules require different components for 868Mhz and 915Mhz versions, but the SX1276 based modules have identical components.

The inAir9 and inAir9B modules are nearly identical, except that the inAir9 has a maximum output power of +14dBm, where the inAir9B has a maximum of +20dBm. The inAir9 requires less supply current than the inAir9B, even when configured for the same output power (+14dBm or less). Choose the inAir9 if power consumption has to be kept to a minimum, and no more than +14dBm is required.

The SX1276 is a revolutionary new chip enabling wireless communications at distances up to 15km, using Semtech's LoRa(Long Range) technology. This chip also supports high performance (G)FSK modes for systems including WMBus, IEEE802.15.4g.

These modules use high quality, RF optimized, 4 layer PCBs. They have been designed with assistance from Semtech engineers, ensuring optimum layout and performance! Only brand name, high quality components are used! All capacitors and inductors are high precision parts, resulting in optimized performance. The crystal is a very critical component for the SX1276/SX1278, and is required to be very accurate to achieve high sensitivity. This board uses a high accuracy crystal as recommended by Semtech.

These modules will outperform competitor products that use 2 layer PCBs, cheap capacitors and inductors and low accuracy crystals! When choosing a SX1276 module, it is very important to realize that they will NOT all perform the same just because they use the same chip! Designing RF boards is very tricky, and lots of power and sensitivity is lost due to bad PCB design and poor components!

These modules enables 3.3V devices (like a Microcontroller for example) to communicate with remote nodes via a wireless protocol. For details on the SX1276 chip, download it's datasheet from www.semtech.com.

This board has a metal shield for improved performance.

These boards are available with an SMA Edge, or U.FL antenna connector. Two standard 1×7, 2.54mm (0.1“) pin header (or press-fit headers) can be soldered onto these boards (position X1 and X2 on board). If required, wires can of course be soldered onto the PCB in stead of pin headers. These modules can also be used as a SX1276 breakout board, and wires can be soldered onto the PCB in stead of pin headers.

Features

For inAir4 and inAir9 only (SMA and U.FL versions)

  • Wide Operating voltage from 1.8V to 3.7V (for inAir4 and inAir9)
  • 153 dB maximum link budget
  • +14 dBm high efficiency PA

For inAir9B +20dBm high power module only (SMA and U.FL versions)

  • Wide Operating voltage of 1.8V to 3.7V for output power up to +17dBm (for inAir9B +20dBm high power module only)
  • Operating voltage from 2.4V to 3.7V for +20dBm output power (for inAir9B +20dBm high power module only)
  • 160 dB maximum link budget
  • +20 dBm high efficiency PA

For all inAir boards

  • Programmable bit rate up to 300 kbps
  • High sensitivity: down to -139 dBm (-148 only possible with TCXO)
  • Bullet-proof front end: IIP3 = -11 dBm
  • Excellent blocking immunity
  • Low RX current of 9.9 mA, 200 nA register retention
  • Fully integrated synthesizer with a resolution of 61 Hz
  • FSK, GFSK, MSK, GMSK, LoRaTMand OOK modulation
  • Built-in bit synchronizer for clock recovery
  • Preamble detection
  • 127 dB Dynamic Range RSSI
  • Automatic RF Sense and CAD with ultra-fast AFC
  • Packet engine up to 256 bytes with CRC
  • Built-in temperature sensor and low battery indicator
  • High quality assembly, with brand name, quality components. No cheap, “no name brand” components are used!
  • Module dimension: 27.3mm x 24.51mm (1.075” x 0.965“)
  • RoHS Compliant
  • Operating Temperature -40°C to + 85°C

Antenna

Currently our inAir modules are available in SMA and U.FL versions.

SMA Antenna Connector

SMA Antenna
inAIR with SMA Antenna

The following versions have a SMA connector(female version), and can be used with antennas fitted with SMA connectors(with male pin inside connector):

  • inAir4 board - 433Mhz Module with SMA Connector
  • inAir9 board - 868Mhz and 915Mhz Module with SMA Connector, standard +14dBm power output
  • inAir9B board - 868Mhz and 915Mhz Module with SMA Connector, +20dBm high power output

For details on the SMA connector use, see this page.
The SMA antennas available at modtronix.com/products-antennas can be used.

U.FL Antenna Connector

U.FL Antenna
inAIR with U.FL Antenna

The following versions have an SMA connector, and can be used with antennas fitted with SMA connectors:

  • inAir9-ufl board - 868Mhz and 915Mhz Module with U.FL Connector, standard +14dBm power output
  • inAir9B-ufl board - 868Mhz and 915Mhz Module with U.FL Connector, +20dBm high power output

For details on the U.FL connector use, see this page.
The U.FL antennas available at modtronix.com/products-antennas can be used.

Configuration

Solder Jumper J1 & RF Switch
Note that solder jumper J1 at the back of the board has to be made to apply power to the RF Switch. Making jumper J1 applies permanent 3.3V power to the RF Switch (U5 in schematic = PE4259).

If solder jumper J1 is not made, power for the RF switch is supplied via iMod port pin 10, marked VS on PCB. This is useful for very low power applications that want to save the 9 to 20uA supply current required by the RF switch. For these applications, power can be supplied(to iMod port pin 10) via a port pin on CPU only when transmitting or receiving.

  • Option 1 to power RF Switch: Make solder jumper J1 on back of board.
  • Option 2 to power RF Switch: Ensure solder jumper J1 is NOT made. RF switch can now be powered on/off by applying 3.3V to iMod port pin 10 (marked VS on PCB).

Dimensions, Schematics & Datasheet

The inAir4, inAir9 and inAir9B all have the same dimensions. Click to enlarge:

inAir9 Dimensions

Below are the schematics for the inAir4, inAir9 and inAir9B modules. Click to enlarge:

inAir4 Schematics
inAir9 Schematics
inAir9B Schematics

The Datasheet for the “SX1276/SX1278” chip used on this board can be downloaded here.

Expansion & Software

The inAir9 module can be used with virtually any Microcontroller that has a SPI port, some free I/Os, and operates at 1.8-3.3V.

For links to example code for Arduino, mbed and Raspberry Pi, click here.

STM32 Microcontrollers

inAir9 together with NZ32

Our NZ32 STM32 Microcontroller boards can be used together with the inAir9 module. The NZ32-SC151 boards is assembled with the STM32L151RC microcontroller (compatible with other STM32L151 and STM32L152 chips). It has a Lithium Polymer battery charger, 3.3V DC/DC regulator, high speed and RTC crystal, LEDs, buttons and circuitry for doing various analog measurements. This board will be followed by alternative versions assembled with the STM32F030R8T6 (low cost), STM32F205RCT6 and STM32F411RCT6 microcontrollers.

mbed Platform

A SX1276 API, and various example projects are available on the mbed.org developer site (search site for SX1276). We will also be providing an example project for our STM32 board mentioned above, and the inAir9.

LoRaWAN and LoRaMAC

This board can be used together with the STM32 board mentioned above to implement the LoRa WAN protocol. The code is available for free from IBM, just do an internet search for “LoRa WAN in C”. At the time of writing this, it was available here.

There is also additional code available on GitHub.

High Quality Components

This module is designed and manufactured by Modtronix! Only high quality components from reputable suppliers are used! All components have been selected to exceed the maximum rated specifications. The following components are used:

  • Capacitors: Capacitors are a very critical part of any electronic circuit, and often responsible for failures! We only used capacitors with much higher than required voltage rating, from reputable suppliers. Manufacturer is either AVX, Kemet, Murata, Nichicon, Panasonic, Samsung, Taiyo Yuden, TDK, Vishay or Yageo.
  • Crystal Quarts: The crystal recommended by Semtech is used.

Pin Headers

This module can be supplied with pin headers. The following options are available.


No Pin Headers

imod-doc_imod_hdr_none_w560.jpg

No pin header is assembled or included with the board.

Loose 3, 4 and 6.0mm Pin Headers

Loose pin header

Two unsoldered(loose) Pin Headers are supplied with the board for free. The pin(mating) length is 3.0, 4.0 or 6.0mm. The number of pins depends on the iMod board. For most boards two 1×6 pin headers are supplied.

  • Select 3.0mm if module is going to be soldered into place.
  • Select 6.0mm if module is going to be plugged into standard 8.5mm high Female Socket.
  • Select 4.0mm if module is going to be plugged into low profile 5.7mm high Female Socket.

For details on these pin headers, see 3.0mm, 4.0mm and 6.0mm pin headers on our site.

3.0mm Pin Headers

imod_imod_hdr_h3_magnify_t.jpg
imod_imod_inboard_and_floating_h3_m.jpg

Pin headers with 3.0mm long pins are assembled. Select this option if the module is going to be soldered into place. The picture on the right shows an example of an iMod module soldered onto a main board.

Header size (2 to 8 pin) depends on iMod board. Many boards will get a 2 pin header on one side, and a 4 or 5 pin on the other. For details on these pin headers, see 3.0mm pin headers on our site.

4.0mm Pin Headers

Invalid Link
imod_imod_inboard_and_floating_h4_m.jpg

Pin headers with 4.0mm long pins are assembled. Select this option if the module is going to be plugged into a low profile 5.7mm high female socket (2.54mm grid).

Header size (2 to 8 pin) depends on iMod board. Many boards will get a 2 pin header on one side, and a 4 or 5 pin on the other. For details on these pin headers, see 4.0mm pin headers on our site.

6.0mm Pin Headers

imod_imod_hdr_h6_magnify_t.jpg
imod_imod_inboard_and_floating_h6_m.jpg

Pin headers with 6.0mm long pins are assembled. Select this option if the module is going to be plugged into a standard 2.54mm female socket.

Header size (2 to 8 pins) depends on iMod board. Many boards will get a 2 pin header on one side, and a 4 or 5 pin on the other. For details on these pin headers, see 6.0mm pin headers on our site.

Round Swiss Pin Headers

imod_imod_hdr_hs_magnify_t.jpg
imod_imod_inboard_and_floating_swiss_m.jpg

Two 6 Pin headers with Round (Swiss) style pins are assembled. Select this option if the module is going to be plugged into female Round (Swiss) Sockets. This is very useful for prototyping! See picture on the right for some examples.

Typically the 6 pin female socket (low profile version) can be used for the main board.

We stock a range of swiss pin headers, available here.

Press-Fit Headers

imod_imod_hdr_pf_magnify_t.jpg
imod_imod_inboard_and_floating_pf_m.jpg

Press-fit type pins are assembled. They can be pressed into 1.00mm holes on a 1.6mm thick (standard PCB thickness) target board. A press-tool might be required for production assembly. Once fitted to the target board, the board is very secure, and can not be removed by hand any more. The picture on the right shows an example of an iMod module mounted onto main board via press-fit connectors.

We stock a range of press-fit pin headers, available here.

Order Codes

The following order codes can be used to order this module:

433 MHz version

  • inAir4 - 433MHz version with SMA connector.
  • inAir4-u - 433MHz version with U.FL connector.

868 and 915 MHz version

Standard module with maximum +14dBm power. The frequency(868MHz or 915MHz) is configured via software.

  • inAir9 - 868/915MHz version with SMA connector.
  • inAir9-u - 868/915MHz version with U.FL connector.

868 and 915 MHz version

High power module with maximum +20dBm power. The frequency(868MHz or 915MHz) is configured via software.

  • inAir9B - 868/915MHz version with SMA connector.
  • inAir9B-u - 868/915MHz version with U.FL connector.

The following codes can be appended to the order codes shown above to add pin headers. See the “Pin Headers” section above for details:

  • -h3l - Two loose 3.0mm Pin Headers are supplied with the board.
  • -h4l - Two loose 4.0mm Pin Headers are supplied with the board.
  • -h6l - Two loose 6.0mm Pin Headers are supplied with the board.
  • -h3 - Two 3.0mm Pin Headers are soldered onto the board.
  • -h4 - Two 4.0mm Pin Headers are soldered onto the board.
  • -h6 - Two 6.0mm Pin Headers are soldered onto the board.
  • -sw - Two Round Swiss Pin Headers are soldered onto the board.
  • -pf - Two Press-Fit Headers are soldered onto the board.

For example, to order the “inAir9” board with a SMA connector, and standard 6mm pin headers assembled, use the following code: inAir9-h6

products/imod/inair.txt · Last modified: 2017/01/23 17:46 by modtronix