Have you set the f9p to output messages on all ports in u-center CFG?
Like in this post about C099.:
Good morning
with a little patience and reading various posts I reached my goal !!
Connect the C099-F9P to the Tablet via blootooth and everything works, even the problem of agopengps version 5.2.2 solved.
All NEMEA messages must be disabled from u-center: except nemea GxGGA, and nemea GxVTG.
u-center> view> configuration view> (item) MSG (messages) scroll the items and deselect all the boxes and at each item press the send button at the bottom left.
To store all select CFG (configuration) and with the control key pressed select all the items in the device window (0-BBR, 1-FLASH, 2-I2C-EEPROM, 4-SPI-FLASH), then send button.
With this procedure I can communicate via bluetooth and everything works correctly!
I hope I was helpful !!!
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