S100 Slave - RF RFM69CW

Overview

The S100 Slave - RF RFM69CW module is a certified Rhomb.io module with a transceiver capable of operation over a wide frequency range, including the 315, 433, 868 and 915 MHz license-free ISM (Industry, Scientific and Medical) frequency bands. All major RF communication parameters are programmable and most of them can be dynamically set. The RF RFM69CW offers the unique advantage of programmable narrow-band and wide-band communication modes. The RFM69CW is optimized for low power consumption while offering high RF output power and channelized operation.

The next figure shows a 3D view for the S100 Slave - RF RFM69CW module:

S100 Slave - RF RFM69CW v1.1 TOP.png

           S100 Slave - RF RFM69CW v1.1 BOTTOM.png

Applications:

  • Automated meter reading
  • Wireless sensor networks
  • Home and building automation
  • Wireless alarm and security systems
  • Industrial monitoring and control
  • Wireless M-BUS

Module Specification

The S100 Slave - RF RFM69CW mounts the RFM69CW module. The RFM69CW is a transceiver module ideally suited for today's high performance ISM band RF applications. It is intended for use as high-performance, low-cost FSK and OOK RF transceiver for robust frequency agile, half-duplex bidirectional RF links, and where stable and constant RF performance is required over the full operating range of the device down to 1.8 V.

The RFM69CW is intended for applications over a wide frequency range, including the 315 MHz, 433 MHz, 868 MHz and 915 MHz ISM bands. Coupled with a link budget in excess of 133 dB, the advanced system features of the RFM69CW include a 66 byte TX/RX FIFO, configurable automatic packet handler, listen mode, temperature sensor and configurable DIOs which greatly enhance system flexibility whilst at the same time significantly reducing MCU requirements.

The RFM69CW complies with both ETSI and FCC regulatory requirements

The following figure identifies the main components onboard:

S100 Slave - RF RFM69CW v1.1 Description.png

The next figure shows the block diagram for the S100 Slave - RF RFM69CW:

S100 Slave - RF RFM69CW v1.1 Block Diagram.png

As a summary, the following table indicates the main features:

S100 Slave - RF RFM69CW Key Features
ISM transceiver module for wide frequency range
315/433/868/915 MHz license-free ISM bands
+13 dBm power output capability
High sensitivity: down to -120 dBm at 1.2 kbps
FSK bit rates up to 300 kb/s
Low current: Rx = 16 mA, 100 nA register retention
Incoming Sync Word Recognition
115 dB+ dynamic range RSSI
SPI interface
Op. voltage: 1.8 V and 2.8 V
Op. temperature: -25 ºC to +85 ºC

User Interfaces

The following table indicates the available serial interfaces of the Rhomb.io standard used in this module. This table relates the interfaces of the Rhomb.io standard with the net names of the schematic and with the components to which they are connected.

Rhomb.io Interface Schematic Signal Component Component Pin
SPI-A SPI-A_MISO RFM69CW (U2) MISO
SPI-A_MOSI MOSI
SPI-A_SCK SCK
SPI-A_CS0 NSS

All user interface signals pass through a level-shifter in order to guarantee communication between Core/Master Module and the Slave Module even when both work with different logic levels.

GPIOs and Control Signals

The following table summarizes the GPIOs and Control Signals used on the S100 Slave - RF RFM69CW. This table relates the signals of the Rhomb.io standard with the net names of the schematic and with the components to which they are connected.

Rhomb.io Signal Schematic Signal Component Component Pin Comments
#RESET_IN #RESET_IN RFM69CW (U2) NRESET Through a logic inversion circuit
1WIRE 1WIRE ID Memory (U5) IO -
IO IO0 RFM69CW (U2) DIO3 -
IO3 DIO0
IO4 DIO2
IO5 DIO1
IO6 DIO5

All GPIO and control signals pass through a level-shifter in order to guarantee communication between Core/Master Module and the Slave Module even when both work with different logic levels.

Power

The S100 Slave - RF RFM69CW can use the 3.3 V rail. Make sure this rail is enabled on the motherboard you are going to plug this module.

You can find more information about power consumption in the RFM69CW datasheet.

Downloads

Schematics

Click the image below to download the schematic files.

Bill Of Materials

Click the image below to download the BOM files.

Fabrication Data

Click the image below to download the fabrication files.

Mechanical Specifications

S100 Slave - RF RFM69CW v1.1 Dimensions.png

Warranty

  • Precaution against Electrostatic Discharge. When handling Rhomb.io products, ensure that the environment is protected against static electricity. Follow the next recommendations:
  1. The users should wear anti-static clothing and use earth band when manipulating the device.
  2. All objects that come in direct contact with devices should be made of materials that do not produce static electricity that would cause damage.
  3. Equipment and work table must be earthed.
  4. Ionizer is recommended to remove electron charge.
  • Contamination. Be sure to use semiconductor products in the environment that may not be exposed to dust or dirt adhesion.
  • Temperature/Humidity. Semiconductor devices are sensitive to environment temperature and humidity. High temperature or humidity may deteriorate semiconductor devices characteristics. Therefore avoid storage or usage in such conditions.
  • Mechanical Shock. Care should be exercised not to apply excessive mechanical shock or force on the connectors and semiconductors devices.
  • Chemical. Do not expose semiconductor device to chemical because reaction to chemical may cause deterioration of device characteristics.
  • Light Protection. In case of non-EMC (Epoxy Molding Compound) package, do not expose semiconductor IC to strong light. It may cause devices malfunction. Some special products which utilize the light or have security function are excepted from this specification.
  • Radioactive, Cosmic and X-ray. Semiconductor devices can be influenced by radioactive, cosmic ray or X-ray. Radioactive, cosmic and X-ray may cause soft error during device operation. Therefore semiconductor devices must be shielded under environment that may be exposed to radioactive, cosmic ray or X-ray.
  • EMS (Electromagnetic Susceptibility). Note that semiconductor devices characteristics may be affected by strong electromagnetic waves or magnetic field during operation.

Disclaimer

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