Add support for Hornbach MSRC-SAL Awning remote

conf/hornbach-msrc-sal.conf

@@ -0,0 +1,79 @@
+# Decoder for Hornbach awning remotes.
+#
+# The remote is labeled MSRC-SAL and has article number 6196477 printed on the
+# label [0]. On the inside there's a chip with its markings removed, but it
+# looks like an off-the-shelf, generic remote. There are multiple LED positions,
+# where only one is soldered. There's unused keys, an unlabeled one on the
+# front, which does not even emit an RC signal, and one on the back, 'time',
+# without even a button behind it, nor was there a spot on the PCB for a key.
+#
+# There is also another sort of remote, which includes a wind-sensor [1].
+# It is assumed that it functions just like a remote, taking light and wind
+# into account to send the close signal.
+#
+# It should probably be mentioned, that Hornbach itself is likely not the
+# manufacturer itself.
+#
+# The remote operates on a 433.92 MHz frequency. The PCB is labeled
+# 'DC104-HD V1.3' and seems to be produced in 2019-07-04.
+#
+# Hornbach awnings use OOK_PWM encoding.
+# - 0 is defined as a 372 µs pulse followed by a 744 µs gap.
+# - 1 is defined as a 744 µs pulse followed by a 372 µs gap.
+# - reset is defined as a 1116 gap followed by a 7812 µs gap.
+# - sync is defined as a 4836 µs pulse, followed by a 1488 µs gap.
+#
+# > __Note:__ It is unclear if the last space (gap) of a bit is always extended
+# to a certain length, or if this is an additional delimiter. One could argue
+# the reset/delimiter is a 8928 µs gap.
+#
+# Transmissions starts with a sync and gap pulse, followed by 40 bits, closed
+# off with a gap and reset pulse.
+# These seem to be repeated at least 4 times, depending on how long the button
+# is kept pressed. The exception is the light, which is never repeated more than
+# 4 times, which is also visible on the remotes activity LED.
+#
+# Possible packet layout:
+# It starts with 32 bits Remote ID, possibly a combination of vendor + function
+# as commonly seen in infra-red remote controls. These are likely remote-unique.
+# When programming the awning to match a new/different remote, one is expected
+# to press `P2` during power-on, which the awning will acknowledge with some
+# beeps. Since the code does not change when pushing `P2`, this is a fair
+# assumption, but an assumption still.
+#
+# Following the remote ID we have a single byte that indicates the button.
+#
+#   | Button   | Byte | Bits             | Function                            |
+#   |----------|------|------------------|-------------------------------------|
+#   | P2       |   33 | 0 0 1 1  0 0 1 1 | Program/Learn remote                |
+#   | MODE     |   3e | 0 0 1 1  1 1 1 0 | Unknown/Undocumented                |
+#   | STOP     |   aa | 1 0 1 0  1 0 1 0 | Stop awning at current position     |
+#   | DOWN rel |   c3 | 1 1 0 0  0 0 1 1 | Release of button DOWN              |
+#   | DOWN     |   cc | 1 1 0 0  1 1 0 0 | Open awning (via internal endstop)  |
+#   | UP rel   |   e1 | 1 1 1 0  0 0 0 1 | Release of button UP                |
+#   | UP       |   ee | 1 1 1 0  1 1 1 0 | Close awning (via internal endstop) |
+#   | LIGHT    |   f0 | 1 1 1 1  0 0 0 0 | Light high/low/off                  |
+#
+# The UP/DOWN buttons are the only buttons that sends a release event when the
+# key is released on the remote. If the button is kept pressed until the remote
+# stops the signal, the UP/DOWN (release) key is not sent. Interestingly the
+# release events is the inverse of the last nibble of the press event. They are
+# ignored by the awning, which makes sense, as it is already moving.
+
+frequency 433.92M
+
+decoder {
+    name       = MSRC-SAL,
+    modulation = OOK_PWM,
+    bits       = 40,
+    short      = 372,
+    long       = 744,
+    reset      = 7812,
+    sync       = 4836,
+    gap        = 1488,
+    get        = RUID:@0:{32}:%x,
+    get        = button:@32:{8}:[0x33:P2 0x3E:MODE 0xAA:STOP 0xC3:DOWN_(release) 0xCC:DOWN 0xE1 UP_(release) 0xEE:UP 0xF0:LIGHT],
+}
+
+# [0]: https://www.hornbach.nl/p/reserveonderdeel-afstandsbediening-voor-zonnescherm-6145050-6145051-6145052-10178611-10178638-10178639-10178640-6823732-6823733-6823734-10461615-104961614-10328334-10328335-10468366-10468367-10468368-10468369-10468370/6196477/
+# [1]: https://www.hornbach.de/p/windwaechter-fuer-motor-markisen-weiss-inkl-1-5-m-netzanschlussleitung/10178681/