Dual radio with Expansion Board

Expansion Radio Board

The LoRa module uses the SPI pins for communication. The SPI port allows more speed communication and frees up the Waspmote's UART for other purposes. The Expansion Board allows to connect two communication modules at the same time in the Waspmote sensor platform. This means a lot of different combinations are possible using any of the wireless radios available for Waspmote: 802.15.4, ZigBee, DigiMesh, 868 MHz, 900 MHz, LoRa, WiFi, GPRS, GPRS+GPS, 3G, 4G, Sigfox, LoRaWAN, Bluetooth Pro, Bluetooth Low Energy and RFID/NFC. Besides, the following Industrial Protocols modules are available: RS-485/Modbus, RS-232 Serial/Modbus and CAN Bus.

Some of the possible combinations are:

  • LoRaWAN - GPRS

  • 802.15.4 - Sigfox

  • 868 MHz - RS-485

  • RS-232 - WiFi

  • DigiMesh - 4G

  • RS-232 - RFID/NFC

  • WiFi - 3G

  • CAN bus -- Bluetooth

  • etc.

Remark: GPRS, GPRS+GPS, 3G and 4G modules do not need the Expansion Board to be connected to Waspmote. They can be plugged directly in the socket1.

Figure: Dual radio with expansion board

The LoRa module can be used only in the SOCKET0. If the user wants to use a wireless radio, they must use the SOCKET1.


  • Avoid to use DIGITAL7 pin when working with Expansion Board. This pin is used for setting the XBee into sleep.

  • Avoid to use DIGITAL6 pin when working with Expansion Board. This pin is used as power supply for the Expansion Board.

  • Incompatibility with Sensor Boards:

    • Agriculture v30 and Agriculture PRO v30: Incompatible with Watermark and solar radiation sensors

    • Events v30: Incompatible with interruption shift register

    • Gases v30: DIGITAL6 is incompatible with CO2 (SOCKET_2) and DIGITAL7 is incompatible with NO2 (SOCKET_3)

    • Smart Water v30: DIGITAL7 incompatible with conductivity sensor

    • Smart Water Ions v30: incompatible with ADC conversion

    • Gases PRO v30: Incompatible with SOCKET_2 and SOCKET_3

    • Cities PRO v30: Incompatible with SOCKET_3. I2C bus can be used. No gas sensor can be used.