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Add support for Aldi Sempre 4-AH0423-4 temperature/rain sensor #2716

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Add support for Aldi Sempre 4-AH0423-4 temperature/rain sensor #2716

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45105c6
Add support for Aldi Sempre 4-AH0423-4 temperature/rain sensor
gerald-reisinger Nov 8, 2023
b4db0c8
Improve documentation for Aldi Sempre 4-AH0423-4 temperature/rain sensor
gerald-reisinger Nov 9, 2023
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19 changes: 9 additions & 10 deletions src/devices/auriol_4ld5661.c
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
/** @file
Auriol 4-LD5661/4-LD5972/4-LD6313 sensors.
Auriol 4-LD5661/4-LD5972/4-LD6313, Sempre 4-AH0423-4 sensors.

Copyright (C) 2021 Balazs H.
Copyright (C) 2023 Peter Soos
Expand All @@ -19,12 +19,14 @@ See also issues #1857, #2631 and PR #2633

Data layout:

II B F CC TTT F RRRRRR
1a 80 88 f0 00 14 5
00011010 10000000 10001000 11110000 00000000 00010100 0101
IIIIIIII B?CCTTTT TTTTTTTT FFFFRRRR RRRRRRRR RRRRRRRR RRRR

- I: id, 8 bit: factory (hard)coded random ID
- B: battery, 1 bit: 1=OK, 0=LOW
- F: flag, 1 bit: unknown yet
- C: channel, 2 bit: 0=CH1, 1=CH2, 2=CH3
- ?: flag, 1 bit: seems to always 0
- C: channel, 2 bit: seems to be a hardcoded channel, 0 on auriol, 3 on sempre
- T: temperature, 12 bit: 2's complement, scaled by 10
- F: 4 bit: seems to be 0xf constantly, a separator between temp and rain
- R: rain sensor, probably the remaining 24 bit: a counter for every 0.3 mm (4-LD5661) or 0.242 mm (4-LD6313)
Expand All @@ -45,10 +47,9 @@ static int auriol_4ld5661_decode(r_device *decoder, bitbuffer_t *bitbuffer)

uint8_t *b = bitbuffer->bb[i];
int id = b[0];
int battery = b[1] & 0x80;
int channel = ((b[1] & 0x30) >> 4) + 1;
int batt_ok = b[1] >> 7;

if (b[3] != 0xf0) {
if (b[3] != 0xf0 || (b[1] & 0x40) != 0) {
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This will ignore the two bits. But don't we want to check that it's 0 or 3? I.e. 1 or 2 are invalid.

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Depends, no idea if there are other brands of this rain meter out there that would use either ch1 or ch2 :/

ret = DECODE_FAIL_MIC;
continue;
}
Expand Down Expand Up @@ -76,8 +77,7 @@ static int auriol_4ld5661_decode(r_device *decoder, bitbuffer_t *bitbuffer)
data_t *data = data_make(
"model", "Model", DATA_STRING, "Auriol-4LD5661",
"id", "ID", DATA_FORMAT, "%02x", DATA_INT, id,
"channel", "Channel", DATA_INT, channel,
"battery_ok", "Battery", DATA_INT, !!battery,
"battery_ok", "Battery OK", DATA_INT, batt_ok,
"temperature_C", "Temperature", DATA_FORMAT, "%.01f C", DATA_DOUBLE, temp_c,
"rain_mm", "Rain", DATA_FORMAT, "%.01f mm", DATA_DOUBLE, rain,
"rain", "Rain tips", DATA_INT, rain_raw,
Expand All @@ -94,7 +94,6 @@ static int auriol_4ld5661_decode(r_device *decoder, bitbuffer_t *bitbuffer)
static char const *const output_fields[] = {
"model",
"id",
"channel",
"battery_ok",
"temperature_C",
"rain_mm",
Expand Down
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