Add support for Watts WFHT-RF thermostat

[aadnehovda]

closes #2230

Added the chksum check.

Test output:

C:\Users\ahovda\source\repos\rtl_433_build>src\Debug\rtl_433.exe -s1M -R0 -R247
rtl_433 version nightly-113-g237c8bc4 branch watts_thermostat at 202309291130 inputs file rtl_tcp RTL-SDR SoapySDR
Use -h for usage help and see https://triq.org/ for documentation.
Trying conf file at "C:\Users\ahovda\source\repos\rtl_433_build\src\Debug\rtl_433.conf"...
Trying conf file at "C:\Users\ahovda\AppData\Local\rtl_433\rtl_433.conf"...
Trying conf file at "C:\ProgramData\rtl_433\rtl_433.conf"...
Disabling all device decoders.
[Protocols] Registered 1 out of 247 device decoding protocols [ 247 ]
Found Rafael Micro R820T/2 tuner
[SDR] Using device 0: Realtek, RTL2838UHIDIR, SN: 00000001, "Generic RTL2832U OEM"
Exact sample rate is: 1000000.026491 Hz
Allocating 15 (non-zero-copy) user-space buffers
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
time      : 2023-09-30 11:19:06
Model     : Watts-WFHTRF ID        : 28082
Pairing   : 1            Temperature: 25.6 C       Setpoint  : 22.1 C        Integrity : CHECKSUM
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
time      : 2023-09-30 11:19:06
Model     : Watts-WFHTRF ID        : 28082
Pairing   : 1            Temperature: 25.5 C       Setpoint  : 22.1 C        Integrity : CHECKSUM
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
time      : 2023-09-30 11:19:06
Model     : Watts-WFHTRF ID        : 28082
Pairing   : 1            Temperature: 25.6 C       Setpoint  : 22.1 C        Integrity : CHECKSUM
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
time      : 2023-09-30 11:19:07
Model     : Watts-WFHTRF ID        : 28082
Pairing   : 1            Temperature: 25.6 C       Setpoint  : 22.1 C        Integrity : CHECKSUM
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
time      : 2023-09-30 11:19:07
Model     : Watts-WFHTRF ID        : 28082
Pairing   : 0            Temperature: 25.6 C       Setpoint  : 22.1 C        Integrity : CHECKSUM
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
time      : 2023-09-30 11:19:10
Model     : Watts-WFHTRF ID        : 28082
Pairing   : 0            Temperature: 25.6 C       Setpoint  : 22.1 C        Integrity : CHECKSUM
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
time      : 2023-09-30 11:19:13
Model     : Watts-WFHTRF ID        : 28082
Pairing   : 0            Temperature: 25.5 C       Setpoint  : 22.1 C        Integrity : CHECKSUM

[gdt]

Not sure where we are - I am waiting for a cleanup/rebase and force push. I realize everybody is busy, and this is hard, so I don't mean to press you about time - just saying that so you aren't waiting for me while I wait for you!

[aadnehovda]

Not sure where we are - I am waiting for a cleanup/rebase and force push. I realize everybody is busy, and this is hard, so I don't mean to press you about time - just saying that so you aren't waiting for me while I wait for you!

Still have not found time to update the doc, which I believe is now the only thing missing. There are some other pending reviews that you can close.

[aadnehovda]

@gdt, @zuckschwerdt, not sure how to improve the doc more at this point.

[zuckschwerdt]

The line bitbuffer_search(bitbuffer, row, 0, &preamble_pattern, should be bitbuffer_search(bitbuffer, row, 0, preamble_pattern, and the file needs a newline at the end.

[aadnehovda]

The line bitbuffer_search(bitbuffer, row, 0, &preamble_pattern, should be bitbuffer_search(bitbuffer, row, 0, preamble_pattern, and the file needs a newline at the end.

Thanks, done! I found and fixed another pointer related issue too and retested with both live and recorded input. Compiles and runs as expected. Please let me know if there are any other blockers (doc, style) or if this is good to go.