Sleed BT to Scantool BT, comms.

I'm must starting to make this.

the scan tool uses AT commands and so does the seeed,( CSR chip) how do I keep them from colliding? (or does CSR have hold this config, and go blind command?) I have not read the pdf on CSR yet but will soon. any one see others attempting this? my jpg above should make it clear my project. as does this.

thanks for any pointers in advance, (no code written yet, but soon)