The new Telegea Smartbox hardware has successfully passed functional testing and is getting ready for a first production batch. Time to take a closer look at what the board offers in terms of interfaces and functionality.
Here is a picture of the fully assembled board with all modules mounted. The brain of the board is the Raspberry Pi compute module which is hidden underneath the display. The PCB is 3x credit card size. It fits a standard 9 units DIN rail mounting enclosure but also a wall mount case is planned. The yellow boxes show the soldered interface connectors, the red boxes indicate the optional hardware modules which will only be plugged in if needed for a specific application.
There is an Ethernet connector for wired network connection or an optional Wifi module.
There are 2 sensor connectors for connecting external temperature sensors (Dallas 1-wire sensors) and temperature/humidity sensors (DHT22 and SHT21). The board has also its own SHT21 sensor mounted.
When mounted, the optional XRF radio transceiver module additionally gives access to a wide range of WirelessThings sensors.
There are four relays mounted on the board which can control a fan coil (low, medium, high fan speed) and a boiler or motorized valve via on/off switch.
The integrated power supply allows for easy installation by connecting directly the mains power to the board without an external power adapter. However also a 5V input is provided.
There is an RS-485 serial port for connecting standard industrial devices which communicate over the widely used Modbus RTU protocol.
There is a host USB port which allows to expand the system by any USB compatible external device. Also a device USB port is provided which is mainly used for the Compute Module flash programming.
There are a number of input/output connectors to handle pulse counters (like energy meters, flow meters), status signals (e.g. “open”, “closed”) and more.
This is optional. Both a resistive and capacitive touch screen can be plugged in if it is needed for a specific application like the smart thermostat.
And here is another close look at the board with two external sensors connected.
We would like to hear from you and get some feedback on the design of this new Smartbox PCB. Is there another interface you would like to see ? What about the form factor ? Any other suggestions ? Please leave your comments below. We’d greatly appreciate it.