Can you please explain how to connect/interface a Raspberry Pi4 and a LimeSdr XTRX.
A PCIe interface is required, hence you cannot.
can you suggest a converter to be used between Raspberry Pi4 and LimeSDR XTRX
You cannot convert USB to PCIe. You need to use a computer with a PCIe interface.
If you would like to use a Raspberry Pi, use Raspberry Pi 5. Then you would need an adapter from its PCIe FPC to mPCIe, which may exist, but I’m not aware of one.
Alternately you could use the LimeNET Micro 2.0 kit:
This takes a Raspberry Pi 4 Compute Module (and when available it should take an RPi CM5 too) plus a LimeSDR XTRX.
The Raspberry Pi people say that are working on the PCIe device. The Orange Pi 5 people claim to already have it.
Hi everyone,
While searching for a solution to connect the LimeSDR XTRX to the Raspberry Pi Compute Module 4 (CM4) using its PCIe interface, I came across this adapter on AliExpress:
[Mini PCIe Adapter on AliExpress]
https://vi.aliexpress.com/item/1005007102591671.html?spm=a2g0o.productlist.main.1.6f3950ecW5vjcT
Key features of the adapter:
- Mini PCIe Interface: Supports full-size and half-size cards like the LimeSDR XTRX.
- Adjustable Voltage: Includes a switch to select between 3.3V and 1.5V, suitable for the LimeSDR XTRX, which requires 3.3V.
- SMA Connectors: Comes with U.FL to SMA cables, making it easy to connect external antennas while protecting the LimeSDR’s U.FL connectors.
- PCIe Compatibility: PCIe x1 connector that should work seamlessly with the CM4 IO Board.
- External Power Supply: Appears to support an external power source for devices with higher power requirements, which could ensure stable operation for the LimeSDR XTRX.
Questions
While this adapter seems to meet the requirements, I’d like to confirm with the community if it’s a viable solution:
- Has anyone used this adapter or a similar one with the LimeSDR XTRX and Raspberry Pi CM4?
Hi, yes. I’ve used similar adapter with CM4 and everything seemed to be working fine.