--- /dev/null
+#include "rtl_433.h"
+#include "util.h"
+
+/*
+ * GT-WT-02 sensor on 433.92MHz
+ *
+ * Copyright (C) 2015 Paul Ortyl
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 3 as
+ * published by the Free Software Foundation.
+ */
+
+ /* Example and frame description provided by https://github.com/ludwich66
+
+ [01] {37} 34 00 ed 47 60 : 00110100 00000000 11101101 01000111 01100000
+ code, BatOK,not-man-send, Channel1, +23,7°C, 35%
+
+ [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
+
+ TYPDescriptian
+ A = Rolling Device Code, Change after battery replacement
+ B = Battery 0=OK 1=LOW
+ C = Manual Send Button Pressed 0=not pressed 1=pressed
+ D = Channel 00=CH1, 01=CH2, 11=CH3
+ E = Temp 0=positive 1=negative
+ F = PositiveTemp =12 Bit bin2dez Temp,
+ F = negative Temp = 4095+1- F (12Bit bin2dez) , Factor Divid F / 10 (1Dezimal)
+ G = Humidity = 7 Bit bin2dez 00-99
+ x = checksum
+
+ bin2dez(Bit1;Bit2;Bit3;Bit4)+ #rolling code
+ bin2dez(Bit5;Bit6;Bit7;Bit8)+ #rolling code
+ bin2dez(Bit9;Bit10;Bit11;Bit12)+ # send, bat , ch
+ bin2dez(Bit13;Bit14;Bit15;Bit16)+ #temp1
+ bin2dez(Bit17;Bit18;Bit19;Bit20)+ #temp2
+ bin2dez(Bit21;Bit22;Bit23;Bit24)+ #temp3
+ bin2dez(Bit25;Bit26;Bit27;Bit28)+ #hum1
+ bin2dez(Bit29;Bit30;Bit31;Bit=0) = #hum2
+ bin2dez(Bit32;Bit33;Bit34;Bit35;Bit36;Bit37) #checksum
+ checksum = sum modulo 64
+*/
+
+
+static int gt_wt_02_process_row(int row, const bitbuffer_t *bitbuffer)
+{
+ data_t *data; /*JF*/
+ const uint8_t *b = bitbuffer->bb[row];
+ const int length = bitbuffer->bits_per_row[row];
+
+ if ( 37 != length
+ || !(b[0] || b[1] || b[2] || b[3] || b[4])) /* exclude all zeros */
+ return 0;
+
+ //fprintf(stderr, "GT-WT-02: %02x %02x %02x %02x %02x\n", b[0], b[1], b[2], b[3], b[4]);
+
+ // sum 8 nibbles (use 31 bits, the last one fill with 0 on 32nd bit)
+ const int sum_nibbles =
+ (b[0] >> 4) + (b[0] & 0xF)
+ + (b[1] >> 4) + (b[1] & 0xF)
+ + (b[2] >> 4) + (b[2] & 0xF)
+ + (b[3] >> 4) + (b[3] & 0xe);
+
+ // put last 6 bits into a number
+ const int checksum = ((b[3] & 1 )<<5) + (b[4]>>3);
+
+ // accept only correct checksums, (sum of nibbles modulo 64)
+ 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 */
+
+ float tempC = (negative_sign ? ( temp - (1<<12) ) : temp ) * 0.1F;
+
+ char time_str[LOCAL_TIME_BUFLEN];
+ local_time_str(0, time_str);
+
+ data = data_make(
+ "time", "", DATA_STRING, time_str,
+ "model", "", DATA_STRING, "GT_WT_02 sensor",
+ "rc", "Rolling Code", DATA_INT, sensor_id,
+ "channel", "Channel", DATA_INT, channel+1,
+ "battery", "Battery", DATA_STRING, battery_low ? "LOW" : "OK",
+ "button", "Button ", DATA_INT, button_pressed,
+ "temperature_C", "Temperature", DATA_FORMAT, "%.01f C",DATA_DOUBLE,tempC,
+ "humidity", "Humidity", DATA_STRING, humidity_str,
+ NULL);
+ data_acquired_handler(data);
+ return 1;
+//# {
+// /* @todo: remove timestamp printing as soon as the controller takes this task */
+// char time_str[LOCAL_TIME_BUFLEN];
+// local_time_str(0, 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, humidity %s%%\n"
+// , time_str, sensor_id, battery_low ? "LOW" : "OK", channel+1, button_pressed, tempC, humidity_str);
+//}
+//return 1; */
+}
+
+static int gt_wt_02_callback(bitbuffer_t *bitbuffer)
+{
+ int counter = 0;
+ // iterate through all rows, return on first successful
+ for(int row=0; row<bitbuffer->num_rows && !counter; row++)
+ counter += gt_wt_02_process_row(row, bitbuffer);
+ return counter;
+}
+
+static char *output_fields[] = {
+ "time",
+ "model",
+ "rc",
+ "channel",
+ "battery",
+ "button",
+ "temperature_C",
+ "humidity",
+ NULL
+};
+
+r_device gt_wt_02 = {
+ .name = "GT-WT-02 Sensor",
+ .modulation = OOK_PULSE_PPM_RAW,
+ .short_limit = 3000,
+ .long_limit = 6000,
+ .reset_limit = 10000,
+ .json_callback = >_wt_02_callback,
+ .disabled = 0,
+ .demod_arg = 0,
+ .fields = output_fields,
+};
+
+// Test code
+// gcc -I src/ -I include/ -std=gnu99 -D _TEST_DECODER src/devices/gt_wt_02.c src/util.c
+#ifdef _TEST_DECODER
+int main()
+{
+ bitbuffer_t bb;
+ bb.num_rows = 1;
+ bb.bits_per_row[0] = 37;
+ const uint8_t b[4][5] =
+ {
+ {0x00, 0x00, 0x00, 0x00, 0x00}, // this one is excluded despite the correct checksum
+ {0x34, 0x00, 0xed, 0x47, 0x60},
+ {0x34, 0x8f, 0x87, 0x15, 0x90},
+ {0x34, 0x00, 0xde, 0x77, 0x78},
+ };
+
+ for(int i=0; i<4; i++)
+ {
+ memcpy(bb.bb[0], b[i], 5);
+ gt_wt_02_callback(&bb);
+ }
+
+/*
+ * 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 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%
+*/
+
+}
+
+#endif
projects / rtl-433.git / blobdiff