Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Decodes the Nice FloR code and serial values #3159

Open
wants to merge 2 commits into
base: master
Choose a base branch
from
Open

Decodes the Nice FloR code and serial values #3159

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
bb75f72
Decodes the Nice FloR code and serial values
chirrindul Jan 24, 2025
3bfa5b9
Fix trailing whitespace issues
chirrindul Jan 26, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
33 changes: 25 additions & 8 deletions src/devices/nice_flor_s.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,16 @@ a packet is made of 72 bits
*/

#include "decoder.h"
#include "nice_flor_s_tables.h"

int reverse_lookup_list(uint16_t enccode, const uint16_t table[], size_t size) {
for (size_t i = 0; i < size; ++i) {
if (table[i] == enccode) {
return (int)i;
}
}
return -1;
}

static int nice_flor_s_decode(r_device *decoder, bitbuffer_t *bitbuffer)
{
Expand All @@ -38,23 +48,30 @@ static int nice_flor_s_decode(r_device *decoder, bitbuffer_t *bitbuffer)
}

bitbuffer_invert(bitbuffer);
uint8_t *b = bitbuffer->bb[0];
uint8_t *b = bitbuffer->bb[0]; /* All the received bytes are stored in b */

uint8_t button_id = b[0] >> 4;
uint8_t button_id = b[0] >> 4; /* Button pressed, NOT ecnrypted */
if (button_id < 1 || button_id > 4) {
return DECODE_ABORT_EARLY;
}
int count = 1 + (((b[0] ^ ~button_id) - 1) & 0xf);
uint32_t serial = ((b[1] & 0xf0) << 20) | ((b[3] & 0xf) << 20) |
(b[4] << 12) | (b[5] << 4) | (b[6] >> 4);
uint16_t code = (b[1] << 12) | (b[2] << 4) | (b[3] >> 4);
int count = 1 + (((b[0] ^ ~button_id) - 1) & 0xf); /* Message count, the SAME serial and code can have various messages with different "count" values */
uint32_t encrypted_serial = ((b[1] & 0xf0) << 20) | ((b[3] & 0xf) << 20) |
(b[4] << 12) | (b[5] << 4) | (b[6] >> 4); /* Remote control Serial Number, ENCRYPTED */
uint16_t encrypted_code = (b[1] << 12) | (b[2] << 4) | (b[3] >> 4); /* Rolling code, ENCRYPTED */

uint16_t code = reverse_lookup_list(encrypted_code, NICE_FLOR_S_TABLE_ENCODE, NICE_FLOR_S_TABLE_ENCODE_SIZE); /* unencrypted code */

uint8_t ki = NICE_FLOR_S_TABLE_KI[code & 0xFF] ^ (encrypted_code & 0xFF); /* Ki is used to decrypt the serial number */

uint32_t mask = (ki << 24 | ki << 16 | ki << 8 | ki) & 0x0FFFFFFF;
uint32_t serial = encrypted_serial ^ mask; /* Serial number unencrypted */

/* clang-format off */
data_t *data = data_make(
"model", "", DATA_STRING, "Nice-FlorS",
"button", "Button ID", DATA_INT, button_id,
"serial", "Serial (enc.)", DATA_FORMAT, "%07x", DATA_INT, serial,
"code", "Code (enc.)", DATA_FORMAT, "%04x", DATA_INT, code,
"serial", "Serial", DATA_FORMAT, "%07x", DATA_INT, serial,
"code", "Code", DATA_FORMAT, "%04x", DATA_INT, code,
"count", "", DATA_INT, count,
NULL);
/* clang-format on */
Expand Down
Loading
Loading