BalenaFin coprocessor flashing

Hello. I am developing a project, based on balenaFin 1.1 with Raspberry pi 3, working under Ubuntu 20.04. I need to build a workflow for flashing co-processor, The link
https://github.com/balena-io-playground/balena-fin-firmata-flash
does not work anymore. Maybe somebody knows a way to flash co-processor firmware, that I want to develop in C++?
Additionally, I installed Simplicity Studio with target board BGM111 BRD4300A, but still i don’t know how to flash co-processor.

Hello,

There is now a balenaBlock that includes firmata, see fin-block. To read more about balenaBlocks in general, please see Introducing balenaBlocks: jumpstart your IoT app development. Does that provide what you need?

Thank you for reporting the broken link. We’d like to fix that. Where did you find it?