Was that hardware rev 2.0.2 board? That board does not have any firmware update. There is no relationship between temp sensor and TCP. All board in 2.2.2 and new 2.3.x boards are having new firmware updates. We do not have any firmware update for 2.0.2 board, due to its ROM size too small.
2.0.2 hw rev temp sensors require to have modification on temp sensor to provide 5V supply, which is no longer required on hw rev 2.2.2 and 2.3.x boards.