Minor fixes Battery and winspeed emos_e6016.c #2484
Description
Hello
Jochen has a EMOS Weatherstation consisting of sensor and display and he found out the battery indication and that the winspeed must be corrected by * 0.295 to get m/s.
Christian @zuckschwerdt is it possible for you to make a pull request. I can't do that at the moment.
/** @file
EMOS E6016 weatherstation with DCF77.
Copyright (C) 2022 Dirk Utke-Woehlke <[email protected]> Jochen Bühner
Minor fixes 19.04.2023 -> battery, and windspeed
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
*/
#include "decoder.h"
/**
EMOS E6016 weatherstation with DCF77.
- Manufacturer: EMOS
- Transmit Interval: every ~61 s
- Frequency: 433.92 MHz
- Modulation: OOK PWM, INVERTED
Data Layout:
PP PP PP II BK KK KK KK CT TT HH SS D? XX RR
- P: (24 bit) preamble
- I: (8 bit) ID
- B: (2 bit) battery indication
- K: (32 bit) datetime, fields are 6d-4d-5d 5d:6d:6d
- C: (2 bit) channel
- T: (12 bit) temperature, signed, scale 10
- H: (8 bit) humidity
- S: (8 bit) wind speed
- D: (4 bit) wind direction
- ?: (4 bit) unknown
- X: (8 bit) checksum
- R: (8 bit) repeat counter
Raw data:
[00] {120} 55 5a 7c 00 6a a5 60 e7 3f 36 da ff 5d 38 ff
[01] {120} 55 5a 7c 00 6a a5 60 e7 3f 36 da ff 5d 38 fe
[02] {120} 55 5a 7c 00 6a a5 60 e7 3f 36 da ff 5d 38 fd
[03] {120} 55 5a 7c 00 6a a5 60 e7 3f 36 da ff 5d 38 fc
[04] {120} 55 5a 7c 00 6a a5 60 e7 3f 36 da ff 5d 38 fb
[05] {120} 55 5a 7c 00 6a a5 60 e7 3f 36 da ff 5d 38 fa
Format string:
MODEL?:8h8h8h ID?:8d BAT?2b DT:6d-4d-5dT5d:6d:6d CH:2d TEMP:12d HUM?8d WSPEED:8d WINDIR:4d ?4h CHK:8h REPEAT:8h
Decoded example:
MODEL?:aaa583 ID?:255 BAT?10 DT:21-05-21T07:49:35 CH:0 TEMP:0201 HUM?037 WSPEED:000 WINDIR:10 ?2 CHK:c7 REPEAT:00
*/
static int emos_e6016_decode(r_device *decoder, bitbuffer_t *bitbuffer)
{
int row = bitbuffer_find_repeated_prefix(bitbuffer, 3, 120 - 8); // ignores the repeat byte
if (row < 0) {
decoder_log(decoder, 2, __func__, "Repeated row fail");
return DECODE_ABORT_EARLY;
}
decoder_logf(decoder, 2, __func__, "Found row: %d", row);
uint8_t *b = bitbuffer->bb[row];
// we expect 120 bits
if (bitbuffer->bits_per_row[row] != 120) {
decoder_log(decoder, 2, __func__, "Length check fail");
return DECODE_ABORT_LENGTH;
}
// model check 55 5a 7c
if (b[0] != 0x55 || b[1] != 0x5a || b[2] != 0x7c) {
decoder_log(decoder, 2, __func__, "Model check fail");
return DECODE_ABORT_EARLY;
}
bitbuffer_invert(bitbuffer);
// check checksum
if ((add_bytes(b, 13) & 0xff) != b[13]) {
decoder_log(decoder, 2, __func__, "Checksum fail");
return DECODE_FAIL_MIC;
}
int id = b[3];
int battery = ((b[12] >> 2) & 0x1);
unsigned dcf77 = ((b[4] & 0x3f) << 26) | (b[5] << 18) | (b[6] << 10) | (b[7] << 2) | (b[8] >> 6);
int dcf77_sec = ((dcf77 >> 0) & 0x3f);
int dcf77_min = ((dcf77 >> 6) & 0x3f);
int dcf77_hour = ((dcf77 >> 12) & 0x1f);
int dcf77_day = ((dcf77 >> 17) & 0x1f);
int dcf77_mth = ((dcf77 >> 22) & 0x0f);
int dcf77_year = ((dcf77 >> 26) & 0x3f);
int channel = ((b[8] >> 4) & 0x3) + 1;
int temp_raw = (int16_t)(((b[8] & 0x0f) << 12) | (b[9] << 4)); // use sign extend
float temp_c = (temp_raw >> 4) * 0.1f;
int humidity = b[10];
float speed_ms = b[11] * 0.295;
int dir_raw = (((b[12] & 0xf0) >> 4));
float dir_deg = dir_raw * 22.5f;
char dcf77_str[20]; // "2064-16-32T32:64:64"
sprintf(dcf77_str, "%4d-%02d-%02dT%02d:%02d:%02d", dcf77_year + 2000, dcf77_mth, dcf77_day, dcf77_hour, dcf77_min, dcf77_sec);
/* clang-format off */
data_t *data = data_make(
"model", "", DATA_STRING, "EMOS-E6016",
"id", "House Code", DATA_INT, id,
"channel", "Channel", DATA_INT, channel,
"battery_ok", "Battery_OK", DATA_INT, battery,
"temperature_C", "Temperature_C", DATA_FORMAT, "%.1f", DATA_DOUBLE, temp_c,
"humidity", "Humidity", DATA_FORMAT, "%u", DATA_INT, humidity,
"wind_avg_m_s", "WindSpeed m_s", DATA_FORMAT, "%.1f", DATA_DOUBLE, speed_ms,
"wind_dir_deg", "Wind direction", DATA_FORMAT, "%.1f", DATA_DOUBLE, dir_deg,
"radio_clock", "Radio Clock", DATA_STRING, dcf77_str,
"mic", "Integrity", DATA_STRING, "CHECKSUM",
NULL);
/* clang-format on */
decoder_output_data(decoder, data);
return 1;
}
static char const *const output_fields[] = {
"model",
"id",
"channel",
"battery_ok",
"temperature_C",
"humidity",
"wind_avg_m_s",
"wind_dir_deg",
"radio_clock",
"mic",
NULL,
};
// n=EMOS-E6016,m=OOK_PWM,s=280,l=796,r=804,g=0,t=0,y=1836,rows>=3,bits=120
r_device const emos_e6016 = {
.name = "EMOS E6016 weatherstation with DCF77",
.modulation = OOK_PULSE_PWM,
.short_width = 280,
.long_width = 796,
.gap_limit = 3000,
.reset_limit = 850,
.sync_width = 1836,
.decode_fn = &emos_e6016_decode,
.fields = output_fields,
};