Reverting this to the form found in oem_gateway gave the correct output for me

2014-05-02 18:37:38,343 INFO Serial RX:  10 49 0 47 0 203 0 183 12
was giving:
2014-05-02 18:37:38,345 DEBUG Data string: [[0,10,0,0,0,37662610412320084583014736539245998496614132666784207011840]]