I am using the HLK-7628N module in production. I have a custom OpenWrt image that I used to load via TFTP. The process was initiated through the U-boot console on UART0. Now I have received a new batch of 50 modules in which the serial console is silent, but there is access via the web interface. I cannot determine which bootloader is installed on these boards or how to load my custom image onto them.
