ThermoPro Tx-7B not working

I'm trying to connect a thermo pro tx7b running

./rtl_433 -f 915M -R 278 and I cannot see any data.

if I run ./rtl_433 -f 915M -X "n=tx7b,m=FSK_PCM,s=104,l=104,r=1000,preamble=d2552dd4" I get:

rtl_433 version 25.12-33-g58c4e95b branch master at 202603271534 inputs file rtl_tcp RTL-SDR SoapySDR

New defaults active, use "-Y classic -s 250k" if you need the old defaults

Found Rafael Micro R828D tuner [SDR] Using device 0: Realtek, RTL2838UHIDIR, SN: 00000001, "Generic RTL2832U OEM" Exact sample rate is: 1000000.026491 Hz [R82XX] PLL not locked!

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time : 2026-03-29 09:22:56 model : tx7b count : 1 num_rows : 1 rows : len : 142 data : 4c40109807faa5755a3d2d2d2d2d20000000 codes : {142}4c40109807faa5755a3d2d2d2d2d20000000

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time : 2026-03-29 09:22:57 model : tx7b count : 1 num_rows : 1 rows : len : 125 data : 2620084c03fd52ad568e969696969000 codes : {125}2620084c03fd52ad568e969696969000

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I'm doing something wrong?