The command to send to recalibrate would be "calibrate\r". The word calibrate followed by a carriage return character 0x0d.
"reset\r" should clear any latches and all outputs should go to zero. You will also hear a "blip" sound. This is what I do in QMP to test the connection.
You can set up a bluetooth serial connection and use Putty to test commands. When QMP starts, it searches for a serial connection to the quadstick, unless the "Enable voice commands over USB" is turned on. Serial ports give you the response text, but the USB method is transmit only.
If you type in "help\r", you will get this:
const char *help_text = "\n\nThe QuadStick understands the following words and phrases:\n\n"
"Action commands allow all except keyboard outputs to be controlled with a text phrase\n\n"
" output_name, state, value, duration where:\n"
" output_name is the output's name, like square, circle, triangle.\n"
" state is 1 for ON, 0 for OFF and -1 for TOGGLE state. Default is 1.\n"
" value is 0 to 100 in percent. Default is 100.\n"
" duration is in milliseconds or -1 for Permanent. Default is 200.\n\n"
"Example:\n"
" circle,1,50,500<enter> will press the circle button at 50% for 500 milliseconds\n"
" right_3,-1,100,-1<enter> will Toggle the R3 button until a new command is given\n"
" square<enter> will press square button firmly for 200 milliseconds.\n\n"
"Direct commands:\n\n"
"help This message\n"
"outputs Prints list of output names\n"
"reset Clears all outputs to idle state\n"
"mode,number Sets profile mode directly to specified number\n\n"
"load,filename.csv Loads new configuration profile\""
"swap[,output_name] Swaps output_name to Lip sensor (or clears swap if blank)\n"
"and,output_name Adds second output_name to swap with Lip sensor\n"
"boot Force immediate hard reset of QuadStick\n"
"debug Turns on printing of raw debug data stream\n"
"echo Toggle current character echo state\n"
"print Prints configuration settings\n"
There are some other commands that I don't have in the help text, but if you can get any of these working, I'll write up the rest.
"output_name" can also be most preference settings too.