CM3-Home a new mother board for Raspberry CM3 (RFC)

Hi, this is a preview of a new mother board designed for Raspberry Pi Compute Module 3 and suitable to run OpenHAB. We are almost closing the project features so before starting the PCB design any comments is well accepted thanks. http://www.tanzolab.it/openhab.

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I can’t say I’m an expert at reading a schematic like this. However, is there a reason for including 868MHz over 433 MHz given 433 MHz seems to be more common? I’m sure a lot of RFXCOM binding users would be interested.

Hi Rich, thanks for your comment. I’m a newbie about RFXCOM. Do you know any SMD module that can be integrated on this board? We could try to find the space to include it. Any link to have an idea of what kind of peripherals we can reach with this standard? We used the Yarm module (https://www.acmesystems.it/yarm) because is a radio module designed and made by us. The main purpose is to use the Cortex A0+ on it to implements the DALI protocol on wires, the second purpose is to have four AD converter (not present on the CM3 module) the third purpose is to receive data from energy harvest sensors (no battery, just solar power) we have under development like this http://www.tanzolab.it/harvest1 (sorry is still in Italian, we’ll translate it very soon :slight_smile:

Hi Rich, I did a little research about RFXCOM and it seems that the only way to integrate this protocol is by using this adapter http://www.rfxcom.com/epages/78165469.sf/en_GB/?ObjectPath=/Shops/78165469/Products/14103. I didn’t find any open source solution to implement the firmware using an OEM hardware to integrate inside the board so, the CM3-Home is already compatible with the RFXCOM in the same way of any other Linux system is compatible with it: using one of the USB port and a RFXtrx433E USB HA controller.

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@Sergio_Tanzilli Will this board allow, for booting purposes, any other storage apart from the Micro SD card ? Like booting from a SSD attached to USB port ?

Will the board support the EnOcean protocol on the 868 MHz frequency ?

It is possible to mount a CM3 module that can boot from eMMC. Regarding the boot from USB I didn’t try but it is an original Raspberry Pi so it seems that can boot from USB https://www.raspberrypi.org/documentation/hardware/raspberrypi/bootmodes/msd.md

Not in native mode. The only way is by using an USB stick

We closed today the final requirements of this project. Now we will start with the PCB design: