IoT Router Board Mini + Compute Module 5
Screwface2591 2025-03-21 18:51:11 2184 Views2 Replies Hello,
Also it is not mentionned to be compatible and wiki page does not get updates, I tried to run the IoT Router Board Mini with a Compute Module 5.
I managed to generate a custom image starting the working Raspberry Pi5 version and added the missing modules for the RTL8111 chip.
Now I have a fully booting image and both NICs are detected. But for a reason I don't understand, I can not get a PC to communicate with the router.
Eth0 has 192.168.1.1 as a static IP address, but the attached computer seems not to get an IP allocated from DHCP server. Even if I set the computer's IP address to 192.168.1.2 manually, I can not get poth to communicate or ping.
There is no public schematic of the board so I can not troubleshoot. Looking at the CM4 and CM5 differences regarding pinout, I noticed the following pin functions changes : Fan_Tacho (pin 16) replaces Ethernet_SYNC_IN and Fan_PWM (pin 19) replaces Ethernet_nLED1.
I don't know if those modifications can explain the communication issue I'm facing.
The same image works fine on Raspberry Pi5.
If anyone have suggestions, I'm all ears!
Thanks
Hi,
I made one more test trying the Raspberry OS lite with the carrier board. I managed to boot and connect to network, apt update and upgrade, with both ethernet ports.
This brings me to the fact that hardware part is working fine, with no incompatibility **ween the router mini board and the CM5. So I guess I'm only facing SW issues. Still investigating…
Screwface2591 Hello,
If you are interested, I got it working. An IRQ to remove in the device tree. This is an early post, I have to use my port to see if reliable, and understand why I needed to remove this IRQ which is not present in Raspberry Pi5. I think I'll post on OpenWRT forum rather than here, to share more widely.
