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GT_WT_02: adjust display of humidity to mimic the authorised receiver

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This commit is contained in:
Paul Ortyl
2015-08-31 17:44:29 +02:00
parent f6a02b4823
commit 70287e3139
1 changed files with 27 additions and 5 deletions
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32
src/devices/gt_wt_02.c
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@@ -18,6 +18,11 @@
[01] {37} 34 8f 87 15 90 : 00110100 10001111 10000111 00010101 10010000
code, BatOK,not-man-send, Channel1,-12,1°C, 10%
Humidity:
* the working range is 20-90 %
* if „LL“ in display view it sends 10 %
* if „HH“ in display view it sends 110%
SENSOR: GT-WT-02 (ALDI Globaltronics..)
TYP AAAAAAAA BCDDEFFF FFFFFFFF GGGGGGGx xxxxx
BIT 76543210 76543210 76543210 76543210 76543
@@ -71,13 +76,30 @@ static int gt_wt_02_process_row(int row, const bitbuffer_t *bitbuffer)
if ((sum_nibbles & 0x3F) != checksum)
return 0;
// humidity: see above the note about working range
const int humidity = (b[3]>>1); // extract bits for humidity
char const * humidity_str; // pointer passed to the final printf
char humidity_str_buf[4]={0}; // buffer for humidity als decimal string
if (10 == humidity)
humidity_str = "LL"; // below working range of 20%
else if (110 == humidity)
humidity_str = "HH"; // above working range of 90%
else if (20<= humidity && humidity <= 90)
{
snprintf(humidity_str_buf, 4, "%2d", humidity);
humidity_str = humidity_str_buf;
}
else
return 0; // very unlikely, but the humidity is outside of valid range
const int sensor_id = b[0]; /* 8 x A */
const int battery_low = (b[1] >> 7 & 1); /* 1 x B */
const int button_pressed = (b[1] >> 6 & 1); /* 1 x C */
const int channel = (b[1] >> 4 & 3); /* 2 x D */
const int negative_sign = (b[1] >> 3 & 1); /* 1 x E */
const int temp = (((b[1] & 15) << 8) | b[2]); /* E + 11 X G */
const int humidity = (b[3]>>1);
float tempC = (negative_sign ? ( temp - (1<<12) ) : temp ) * 0.1F;
{
@@ -88,9 +110,9 @@ static int gt_wt_02_process_row(int row, const bitbuffer_t *bitbuffer)
local_time_str(time_now, time_str);
/* @todo make temperature unit configurable, not printing both */
fprintf(stdout, "%s GT-WT-02 Sensor %02x: battery %s, channel %d, button %d, temperature %3.1f C / %3.1f F, humidity %2d%%\n"
, time_str, sensor_id, battery_low ? "low" : "OK", channel, button_pressed
, tempC, celsius2fahrenheit(tempC), humidity
fprintf(stdout, "%s GT-WT-02 Sensor %02x: battery %s, channel %d, button %d, temperature %3.1f C / %3.1f F, humidity %s%%\n"
, time_str, sensor_id, battery_low ? "low" : "OK", channel+1, button_pressed
, tempC, celsius2fahrenheit(tempC), humidity_str
);
}
return 1;
@@ -141,7 +163,7 @@ int main()
/*
* Result:
2015-08-16 19:08:16 GT-WT-02 Sensor 34: battery OK, channel 0, button 0, temperature 23.7 C / 74.7 F, humidity 35%
2015-08-16 19:08:16 GT-WT-02 Sensor 34: battery low, channel 0, button 0, temperature -12.1 C / 10.2 F, humidity 10%
2015-08-16 19:08:16 GT-WT-02 Sensor 34: battery low, channel 0, button 0, temperature -12.1 C / 10.2 F, humidity LL%
2015-08-16 19:08:16 GT-WT-02 Sensor 34: battery OK, channel 0, button 0, temperature 22.2 C / 72.0 F, humidity 59%
*/