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Add support for Geevon TX19-1 #3109

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Add support for Geevon TX19-1 #3109

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3 changes: 2 additions & 1 deletion include/rtl_433_devices.h
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Original file line number Diff line number Diff line change
Expand Up @@ -268,7 +268,7 @@
DECL(chamberlain_cwpirc) \
DECL(thermopro_tp829b) \
DECL(arad_ms_meter) \
DECL(geevon) \
DECL(geevon_tx16_3) \
DECL(fineoffset_wh46) \
DECL(vevor_7in1) \
DECL(arexx_ml) \
Expand All @@ -278,6 +278,7 @@
DECL(bresser_st1005h) \
DECL(deltadore_x3d) \
DECL(quinetic) \
DECL(geevon_tx19_1) \

/* Add new decoders here. */

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82 changes: 70 additions & 12 deletions src/devices/geevon.c
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Original file line number Diff line number Diff line change
Expand Up @@ -9,47 +9,70 @@
(at your option) any later version.
*/

#include <stdbool.h>
#include "decoder.h"

/**
Geevon TX16-3 Remote Outdoor Sensor with LCD Display.
Geevon TX16-3 and TX19-1 Remote Outdoor Sensor with LCD Display.

This device is a simple temperature/humidity transmitter with a small LCD display for local viewing.
These devices are a simple temperature/humidity transmitter, TX16-3 has a small LCD display for local viewing.

The test packet represents:
- channel 1
- battery OK
- temperature of 62.6 Fahrenheit or 17 Celsius
- 43% relative humidity.

Data layout:
Data layout for TX16-3:

Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8
IIIIIIII BxCCxxxx TTTTTTTT TTTT0000 HHHHHHHH FFFFFFFF FFFFFFFF FFFFFFFF CCCCCCCC
87 00 29 e0 2b aa 55 aa e8

Data layout for TX19-1:
Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8 Byte 9
IIIIIIII BxCCxxxx TTTTTTTT TTTT0000 HHHHHHHH FFFFFFFF FFFFFFFF FFFFFFFF CCCCCCCC M
b5 00 2d 40 2c aa 55 aa af

- I: ID?
- B: Battery low status (0 = good, 1 = low battery)
- C: Channel (0, 1, 2 as channels 1, 2, 3)
- T: Temperature - represented as ((degrees C * 10) + 500)
- H: Relative humidity - represented as percentage %
- F: Integrity check - 3 bytes are always 0xAA 0x55 0xAA
- X: CRC checksum (CRC-8 poly 0x31 init=0x7b)
- M: set if it's a middle packet (3rd out of 5)

Format string:

ID:8h BATT:b ?:b CHAN:2h FLAGS:4h TEMP_C:12d PAD:4h HUM:8d FIX:24h CRC:8h 1x

Example packets:
Example packets for TX16-3:

f4002ac039aa55aa11
f4002ab039aa55aa54
f4002aa039aa55aa28
f4002a9039aa55aaac

Example packets for TX19-1 (in the last nibble only the most significant bit is used)

b5002d402caa55aaf20
b5002d402caa55aaf28
01102d402daa55aa130
01102d402eaa55aaea0
01002d302daa55aaf20
01002d302daa55aaf20
01202d302daa55aa8b0

*/

static int geevon_callback(r_device *decoder, bitbuffer_t *bitbuffer)
enum checksum_type {
CRC8,
LFSR,
};

static int geevon_decode(r_device *decoder, bitbuffer_t *bitbuffer,
enum checksum_type checksum_type)
{
// invert all the bits
bitbuffer_invert(bitbuffer);
Expand All @@ -73,10 +96,20 @@ static int geevon_callback(r_device *decoder, bitbuffer_t *bitbuffer)
return DECODE_FAIL_MIC;
}

// Verify CRC checksum
uint8_t chk = crc8(b, 9, 0x31, 0x7b);
if (chk) {
return DECODE_FAIL_MIC;
// Verify checksum
switch (checksum_type) {
case CRC8:
if (crc8(b, 9, 0x31, 0x7b)) {
return DECODE_FAIL_MIC;
}
break;
case LFSR:
if (b[8] != lfsr_digest8_reverse(b, 8, 0x98, 0x25)) {
return DECODE_FAIL_MIC;
}
break;
default:
break;
}

// Extract the data from the packet
Expand All @@ -89,7 +122,8 @@ static int geevon_callback(r_device *decoder, bitbuffer_t *bitbuffer)
// Store the decoded data
/* clang-format off */
data_t *data = data_make(
"model", "", DATA_STRING, "Geevon-TX163",
"model", "", DATA_COND, checksum_type == CRC8, DATA_STRING, "Geevon-TX163",
"model", "", DATA_COND, checksum_type == LFSR, DATA_STRING, "Geevon-TX191",
"id", "", DATA_INT, b[0],
"battery_ok", "Battery", DATA_INT, !battery_low,
"channel", "Channel", DATA_INT, channel,
Expand All @@ -103,6 +137,18 @@ static int geevon_callback(r_device *decoder, bitbuffer_t *bitbuffer)
return 1;
}

/** @sa geevon_decode() */
static int geevon_tx16_3_decode(r_device *decoder, bitbuffer_t *bitbuffer)
{
return geevon_decode(decoder, bitbuffer, CRC8);
}

/** @sa geevon_decode() */
static int geevon_tx19_1_decode(r_device *decoder, bitbuffer_t *bitbuffer)
{
return geevon_decode(decoder, bitbuffer, LFSR);
}

static char const *const output_fields[] = {
"model",
"battery",
Expand All @@ -113,14 +159,26 @@ static char const *const output_fields[] = {
NULL,
};

r_device const geevon = {
r_device const geevon_tx16_3 = {
.name = "Geevon TX16-3 outdoor sensor",
.modulation = OOK_PULSE_PWM,
.short_width = 250,
.long_width = 500,
.sync_width = 750, // sync pulse is 728 us + 728 us gap
.gap_limit = 625, // long gap (with short pulse) is ~472 us, sync gap is ~728 us
.reset_limit = 1700, // maximum gap is 1250 us (long gap + longer sync gap on last repeat)
.decode_fn = &geevon_callback,
.decode_fn = &geevon_tx16_3_decode,
.fields = output_fields,
};

r_device const geevon_tx19_1 = {
.name = "Geevon TX19-1 outdoor sensor",
.modulation = OOK_PULSE_PWM,
.short_width = 250,
.long_width = 500,
.sync_width = 750, // sync pulse is ~728 us + ~728 us gap
.gap_limit = 625, // long gap (with short pulse) is ~472 us, sync gap is ~728 us
.reset_limit = 1700, // maximum gap is 1250 us (long gap + longer sync gap on last repeat)
.decode_fn = &geevon_tx19_1_decode,
.fields = output_fields,
};
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