Ethernet testing with raspberry pi code#
Identifiable product code is YS-LAN26 RT8152B. (compare the above with the 100-baseT ethernet theoretical maximum of 100Mb/s or 12.5MB/s.)Īccording to labelling, the chipset in this product is a RealTek 8152B. So it would appear that the PiZero with this adaptor outperforms the ModelB.
You might want to try the likes of Pimoroni (who specialise in Pi stuff) to see if there's a proven adapter on sale there. Given you've tried the adapter on a second, more capable, computer I would suggest the problem lies with the Chinese adapter you're using. To cool the CM4 we have a four pin JST fan connector, compatible with four pin fans, but keep in mind that this is a four pin 1.25mm pitch header and not a typical fan connector.A lot of the USB to Ethernet adapters available from China (via EBay or Amazon) have old chipsets that are actually USB1 and this limits the potential speed that you can get.
During our stressberry tests, we saw the current draw rise to 1.1A and the temperature easily went past the 80 Celsius hard thermal throttle point which dropped the CPU down to 1 GHz. The Raspberry Pi 4 has worse overclocking potential than the Compute Module 4 and Pi 400 Novasom M9: A Raspberry Pi alternative that supports M. We connected the Seeed Dual Gigabit Ethernet Carrier Board to our bench power supply and saw that on boot the power draw went to 5.1V at 2.1A, then stabilized to an idle power draw of 800mA at 5.1V. We were also unable to test the I/O FPC which breaks out six GPIO pins, 3v3 and GND via a flat flex connector. We were unable to test the DSI connector for the official display but we were able to test the micro HDMI output, and saw the familiar Raspberry Pi OS desktop.
Ethernet testing with raspberry pi update#
A replacement is being sent to us and we shall update the review once we receive it. It transpires that our review unit is an older engineering sample which has a hardware bug. All we saw were error messages indicating that a camera was not present.Īfter speaking to Seeed and flashing a fresh OS to the eMMC the error remained. The alternative installation worked in that it downloaded the file to our CM4 but even after enabling the camera interface via raspi-config and rebooting, we failed to take a picture with the camera. We tested both v1.3 and v2.0 of the official cameras with the board and the first issue we faced was the installation instructions that had an incorrect URL We sourced an alternative from the Raspberry Pi Github repository and tried again. One is for the Official Raspberry Pi Camera (CSI) and the other for the official display (DSI). There are two flat flex connectors on the board. The interesting thing about this slot is that we need to insert the microSD card upside down, something that caught us off guard. If you have a Compute Module 4 Lite (no eMMC) or prefer to boot from micro SD then there is a microSD card slot on the underside of the board (see best microSD cards for Raspberry Pi).
Using a jumper wire we can connect GND and BOOT to force the CM4 into a USB boot mode necessary to flash the OS to the eMMC flash found on some CM4 SKUs. Just next to the USB 3.0 header are three pins.