Using framebuffer on RPi nodered - how to

I am able to run the application ./MLX90640 from nodered and display values on the canvas. As the data is
transfered through system console it is slow and unreliable. My question is how can I access the frame buffer and display on the canvas on nodered. There is an example ./fbuf in Pimoroni library, which will keep updating the frame buffer (/dev/fb0). How can I access it from another application like nodered exec.
Any advice, links will be appreciated.