Fully assembled RN2903A breakout board with PCB trace antenna - supports LoRa / LoRaWANDesigned by Azzy's Electronics in United States of America
This breakout board offers an affordable solution for makers working with the popular RN2903A LoRa transceivers from Microchip, widely used for LoRaWAN. The layout of this breakout board is based o...Read More…
This breakout board offers an affordable solution for makers working with the popular RN2903A LoRa transceivers from Microchip, widely used for LoRaWAN. The layout of this breakout board is based on the the datasheet reference designs. This board breaks out all 14 GPIO pins to a row of 0.1" pin header, and the power and serial communication pins to a second row of 0.1" pin header. This version of the board has a built-in PCB trace antenna (designed in accordance to Microchip's specifications) - for a version that has an SMA connector and supports the RN2483A (for Europe) see this listing. While the PCB trace antenna does not get the same range possible with an external antenna, the PCB trace antenna performs pretty well without the size and awkward shape of an external one.
The RN2483A and RN2903A are identical except for their transmission frequency and which world regions they are approved for use in. The RN2483 operates at 433mhz and 868mhz, and is approved for use in Europe, while the RN2903A operates at 915mhz, and is approved for use in the US, Canada, Australia, and New Zealand. The PCB trace antenna on this board is only for use with the RN2903. Prior to ordering, please verify that the RN2903A is legal to operate in your jurisdiction.
The RN2903A is an updated version of the RN2903 - this comes with both a firmware and apparently a hardware rev as well; the differences are very slight - my understanding is that it's a "bug fix" type of change.
The pin layout for the serial and power pins is designed such that it can be plugged into breadboard alongside an Espruino Pico, and the pins will line up.
Assembled in USA.
Since many of our customers are using these with 5v microcontrollers (such as Arduino), we now offer a level shifter as an add-on. These level shifters are mass-produced 4-channel bidirectional fet-based level shifters. See the diagrams below for wiring examples.
This board can ship with three regulator options. If you have a regulator on the RN2483/RN2903 board, it can be used to supply 3.3v to the rest of the project (within the limits of the regulator - 1A, less if Vin exceeds 5v due to heat dissipation). See the wiring diagrams below.
No regulator - If you will already have a regulated 3.3v supply, there is no need to use a regulator on the RN2483 board. The board will be shipped with a 4.7uf cap installed on the pads for the output capacitor, but no regulator or input capacitor.
ZLDO1117 - The ZLDO1117 is one of the best 1117-series regulators available, and provides a dropout of around 1.1V at maximum load (meaning a minimum of 4.4 V input to get 3.3v out), and permits a maximum input voltage of up to 18V.
AP2114 - The AP2114 is a modern LDO regulator that has much lower dropout than the 1117 series, as low as a few tenths of a volt. This allows it to put out 3.3v when powered from a 1S LiPo battery. However, the maximum input voltage must not exceed 6 volts.
Generally speaking, anything that applies to the RN2483/A also applies to the RN2903A - The RN2483 came out first and has a larger following (particularly in Europe, where the maker culture seems to be closer to mainstream).
The Things Network is a thriving community dedicated to LoRaWAN which has a great deal of useful information available to makers experimenting with these sort of devices:The Things Network
For use with Espruino, see the Espruino RN2483 module documentation - the
For use with a Raspberry Pi, Michael Honaker of Beach Cities Software has written some demo code that can be valuable to help get started, available from his Github: Interfacing with C Interfacing with Python
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Scott | May 3, 2019
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