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--- doc:appunti:hardware:raspberrypi_nas_x835_sata_board [2021/03/22 10:22] – niccolo
+++ doc:appunti:hardware:raspberrypi_nas_x835_sata_board [2021/04/12 14:07] (current) – niccolo
@@ Line 25: / Line 25: @@
 So the only viable solution for **network connection** is to use a **5 GHz WiFi** access point or the **Ethernet** cable. If you need a **wireless keyboard** or **gamepad** you can connect the USB dongle to the Raspberry Pi using an extension cable; I use one about of 0.5 meters, taking care to arrange the cable as far as possible from the Raspberry Pi. In this way **I can operate the gamepad** in the room at a distance of about 5 meters.
-FIXME I have to try to connect the X835 board to an USB 2.0 interface, just to see if the interference problem goes away. In that case I wish to measure the disk performance degradation.
+If you **connect the X835 board** through one **USB 2 interface** of the Raspberry Pi, you can solve the interference problem. I tried that configuration and I was able to use a **remote keyboard** and a **remote gamepad** (both using a 2.4 GHz USB nano dongle) with no problems. You have to forgo the hard disk performance granted by the USB 3.0 bus (e.g. 185 Mb/s read rate) and stuck to USB 2 (32 Mb/s).
   * **[[https://hackaday.com/2019/11/28/raspberry-pi-4-hdmi-is-jamming-its-own-wifi/|Raspberry Pi 4 HDMI Is Jamming Its Own WiFi]]**
@@ Line 32: / Line 32: @@
   * **[[https://github.com/raspberrypi/firmware/issues/1430|USB3 and 2.4 GHz Wifi]]**
+===== Web References =====
+  * **{{.:raspberrypi:suptronics-x835-board-raspberry-pi4.pdf|SupTronics X835 User Manual}}**