Node Specifications
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There is currently only a single type of node available in the City of Things testbed. It consists of of an apu2c4 embedded pc with two WiFi interfaces and a number of additional radio modules that are connected through USB. It supports the following wireless technologies out of the box:
- WiFi 802.11ac on 2.4 GHz and 5GHz
- Bluetooth 4.0 (with full BLE support)
- IEEE 802.15.4 on 2.4 GHz and 868MHz
- Dash7 on 433MHz and 868MHz
- LoRaWAN on 868MHz (client only)
All these components are housed in a waterproof metal box to protect them from the elements. The antenna's of the node are housed in a separate (plastic) enclosure and the two are connected by low-loss coax cables.
Node Hardware
Each node uses a PCEngines apu2c4 board as a central controller. This board is equipped with the following hardware:
- CPU: AMD GX-412TC 1GHz Quad-core CPU (onboard)
- Memory: 4GB DDR3-1333 MHz (onboard)
- Storage: 240GB Samsung EVO 850 SSD (mSATA)
The apu2c4 is also equipped with the following WiFi cards:
- Atheros (ath10k) QCA9880 Chipset
- Supports IEEE 802.11 a/b/g/n/ac
- Operates on both 2.4GHz and 5GHz
- Connected to three dual-band antennas (3x3 MIMO is supported).
- Intel 7260 Chipset
- Supports WiFi a/b/g/n/ac and Bluetooth 4.0
- Operates on both 2.4GHz and 5GHz (client mode only)
- Connected to two dual-band antennas (2x2 MIMO is supported).