# Rfµ-328 Radio Transceiver (RFu 328)

**Type:** Product page · **SKU:** 005-R012 · **Brand:** [Ciseco](https://core-electronics.com.au/brands/ciseco-australia)
**Page:** https://core-electronics.com.au/rf-328-radio-transceiver-rfu-328.html ([markdown](https://core-electronics.com.au/rf-328-radio-transceiver-rfu-328.html.md))

## Retired product

This product is retired and no longer available for purchase. Search the catalogue for an alternative.

## Description

The RFu-328 is the world’s smallest, most affordable, RF capable, over the air Arduino IDE programmable device:

- **Smallest**: 25% less volume than a 328 DIP chip alone
- **Most affordable**: these are the most affordable devices you'll find
- **RF capable**: SRF or Hope RFM12B
- **Over the air programmable**: using SRF
 
Aimed at making Arduino powered products a reality. Ideal for lower power or smaller size projects and even small scale product production, this tiny module is perfect for the new age of the Internet of Things. The module has an SRF radio module installed so it's an out the box low power RF node. It's the world’s only SOM (system on module) Arduino device that can be programmed over the air direct from the Arduino IDE.

Will run the same code as the larger XinoRF because it shares the same ATmega 328 micro running at 16 MHz, almost all of the Arduino pins are available for use. So you can develop your system with the XinoRF and deploy with RFu-328.

Also available without the SRF, so you can mount your own RFM12B unit (RFU-328-BARE).

**Key Features**

- Has all the advantages of our XRF and SRF radio modules: great range, low power, easy use
- Works with a range of sensor modules
- Comes installed with the later smaller, faster Arduino UNO bootloader.
- Will run the same code as XinoRF
- Will run any existing Arduino code with no or very little modification – pin 8 is radio enable – that’s it!)
- Supports XBee style wireless comms (most series 1 type XBee serial sketches will easily work)
- Surface mount option
- XBee style 2 x 10 way pin header option
- RoHS
- CE
- WEEE
- Made in the UK
- Dimensions: 2.53mm x 22mm x 27.70mm (or 35.5mm long with chip antenna)
 
 **Electrical characteristics**

- Supply voltage: 
    - Minimum 3.3v
    - Maximum 3.6v (5v if no radio is installed)
    - Limit 3.9v
- Current consumption:
- ATMega running & SRF transmitting 28.9mA
- ATMega running & SRF receiving 31.2mA
- ATMega running & SRF sleeping (ATSM2) 7.1mA
- ATMega sleeping (powerdown + WDT wake) & SRF sleeping (ATSM2) 4.7uA
 
 
 **RF characteristics**

- 868 and 915 MHz ISM/SRD bands (can support 315, 433, 900 MHz)
- Over the air data rate of 250Kbps with a max of 500Kbps
- Up to 10dBm (10 mW) power
 
If you wish to program with an FTDI style interface you will need to put a 0.1uf capacitor between the interface DTR and pin 5 (RESET) this is the same technique employed on the Arduino, this gives your interface the ability to auto reset the module which is required to invoke the Arduino bootloader. Alternatively look at our new 4 in 1 Explorer Plus USB interface which has an XBee style socket, FTDI style connector and built in SRF-U which has an RFu Auto Reset enable jumper as well as support for conventional XBee/XRF type devices.

**Documentation**

- RFu-328 documents
- v1.2 schematic
 
**Related or associated products**

XinoRF (search the store)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/d/s/dsc_1812.jpg)