Add Heatilator-Gas-Log decoder conf (#1963)

conf/heatilator.conf

@@ -0,0 +1,65 @@
+# Decoder for Heatilator gas log remotes.
+# 
+# Heatilator gas logs use OOK_PULSE_PPM encoding. The format is very similar to
+# that decoded by 'generic_remote', but seems to differ slightly in timing. The
+# device does _not_ use a discrete chip to generate the waveform; it's generated
+# in code.
+# 
+# The packet starts with 380 uS start pulse followed by an eternity (14.3 mS) of silence.
+# - 0 is defined as a 1430 uS pulse followed by a 460 uS gap.
+# - 1 is defined as a 380 uS pulse followed by a 1420 uS gap.
+# 
+# Transmissions consist of the start bit followed by 24 data bits. These packets are
+# repeated many times.
+# 
+# Because there's such a long start bit/preamble, the decoder usually creates the first
+# row with a single bit, followed by 'n' rows with 25 bits (the 24 data bits and the
+# start bit of the following packet), then the last row with the expected 24 bits.
+# 
+# Packet layout:
+# 
+#      Bit number
+#      0  1  2  3  4  5  6  7  8  9  10 11 12 13 14 15 16 17 18 19 20 21 22 23
+#      - - - - - - - - - - DEVICE SERIAL NUMBER - - - - - - - - - |- COMMAND -
+# 
+# The device serial number is (presumedly) burned into the device when manufactured.
+# The command is further broken down into the following bits:
+# 
+#     20 21 22 23
+#     X  X  S  T
+# 
+# X bits are unknown in function. S is the 'state' of the gas valve/flame. S = 0
+# means 'flame off'. S = 1 means 'flame on'. T indicates whether or not the remote
+# is in 'thermo' mode - this is a mode where the remote detects the room temperature
+# and commands the gas logs on/off to maintain the temperature selected on the remote.
+# 
+# There are safety mechanisms afoot - whenever the gas logs are 'on', on with a timer,
+# or on in thermo mode, occasional 'keepalive' messages are sent to the gas logs to
+# guarantee that the remote is still in range and the batteries are not dead. Generally
+# these messages are exactly the same as the last command that the remote sent - that is,
+# if you turn the logs 'on' manually, the remote will send the same 'on' command every so
+# often.
+# 
+# The COMMAND S and T bits have these meanings:
+#     S  T
+#     ----
+#     0  0 - Off, Manual mode
+#     0  1 - Off, Thermo mode (room is too warm)
+#     1  0 - On,  Manual mode.
+#     1  1 - On,  Thermo more (room is too cold)
+
+frequency 433.92M
+
+decoder {
+    name        = Heatilator-gas-log-remote,
+    modulation  = OOK_PWM,
+    short       = 380,
+    long        = 1420,
+    gap         = 0,
+    reset       = 1800,
+    bits        >= 24,
+    bits        <= 25,
+    get         = id:@0:{20},
+    get         = state:@22:{1}:[0:flame_off 1:flame_on],
+    get         = mode:@23:{1}:[0:manual 1:thermo],
+}