DFRobot Router + CM4 + OpenWrt = unsupported board
FrantisekZustin 2022-09-02 16:19:49 2485 Views5 Replies Hello all,
I installed an openWrt into my CM4 with eMMC (using rpiboot/rufus (or Etcher)), but after successful flashing and enabling nVME Boot, when I plug the USB cable into the DFRobot Router, ACT LED flashes 4 long and 4 short times after a short time. This repeats after a while.
No Luci interface at 192.168.1.1, no ssh, no nothing.
As I read somewhere else, this LED flashing pattern means "unsupported board".
Yes, CM4 and DFRobot board is good - tried to flash with other images (raspbian), and it worked like a charm with no errors.
I tried to use the DFRobot/openWrt image from your wiki page, I tried also the factory CM4 image from OpenWrt site, but still 4 long and 4 short ACT Led.
Using powerful (3A) power supply, so no undervoltage for the board.
CM4 is in this configuration:
1GB RAM, 8GB nVME, no Wifi
I tried this with 8GB RAM, 32GB nVME, Wifi+BT - same result.
Please help me with this.
Hi Everyone! Just made a step by step tutorial to create a custom OpenWRT image for DFROBOT Router Board + CM4, can anyone can test it out to see if it solves the problem?
Link for the tutorial: https://viniciuspaes.com/raspberry-pi/how-to-build-custom-openwrt-image-raspberry-pi-router/
Link for the image files generated by the tutorial: https://drive.google.com/drive/folders/1ETjAfQOTZthzX6gUCI4hoGncGX8F7RNg?usp=sharing
I can redo the tutorial and add any custom driver that is necessary, just let me know if it is working.
Best Regards,
Vinicius
viniciuspaes Hey!
Sorry to necro this thread.
I have a similar problem. I've got an 8 month old CM4 with 1GB RAM, no eMMC or WiFi and it works perfectly fine.
I bought a new CM4 with 2GB RAM, 32GB eMMC and WiFi and it refuses to boot, despite me installing the OS correctly to the eMMC. I even tried installing a new image to the eMMC of the CM4. I initially thought the new CM4 board was broken, but I can get it to boot other OSes.
I appreciate that we can use a newer image without the 2nd NIC, but I am unsure how to go about this if can't get my board connected to the internet to install the drivers. Can I somehow download the OpenWRT packages and then install them via SSH/SFTP?
SteveWi The dfrobot custom image of OpenWRT is outdated, it does not work with newer boards. DFROBOT: Please update the image.
The latest OpenWRT image works fine but does not have the driver for the second ethernet adapter (https://openwrt.org/toh/hwdata/raspberry_pi_foundation/raspberry_pi_foundation_raspberry_pi_cm4)
JohannesF 