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[rtl-433.git] / src / devices / rftech.c

diff --git a/src/devices/rftech.c b/src/devices/rftech.c
new file mode 100644 (file)
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+++ b/src/devices/rftech.c
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+/* RF-tech decoder
+ * Also marked INFRA 217S34
+ * Ewig Industries Macao
+ *
+ * Copyright © 2016 Erik Johannessen
+ *
+ * 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 "rtl_433.h"
+#include "pulse_demod.h"
+#include "util.h"
+
+
+static int rftech_callback(bitbuffer_t *bitbuffer) {
+    char time_str[LOCAL_TIME_BUFLEN];
+    bitrow_t *bb = bitbuffer->bb;
+    uint16_t sensor_id = 0;
+    uint8_t button;
+    uint8_t battery;
+    double value;
+    data_t *data;
+    int r;
+
+    local_time_str(0, time_str);
+
+    r = bitbuffer_find_repeated_row(bitbuffer, 3, 24);
+
+    if(r >= 0 && bitbuffer->bits_per_row[r] == 24) {
+       /* Example of message:
+        * 01001001 00011010 00000100
+        *
+        * First byte is unknown, but probably id.
+        * Second byte is the integer part of the temperature.
+        * Third byte bits 0-3 is the fraction/tenths of the temperature.
+        * Third byte bit 7 is 1 with fresh batteries.
+        * Third byte bit 6 is 1 on button press.
+        *
+        * More sample messages:
+        * {24} ad 18 09 : 10101101 00011000 00001001
+        * {24} 3e 17 09 : 00111110 00010111 00001001
+        * {24} 70 17 03 : 01110000 00010111 00000011
+        * {24} 09 17 01 : 00001001 00010111 00000001
+        *
+        * With fresh batteries and button pressed:
+        * {24} c5 16 c5 : 11000101 00010110 11000101
+        *
+        */
+       sensor_id = bb[r][0];
+       value = (bb[r][1] & 0x7f) + (bb[r][2] & 0x0f) / 10.0;
+       if(bb[r][1] & 0x80) value = -value;
+
+       battery = (bb[r][2] & 0x80) == 0x80;
+       button = (bb[r][2] & 0x60) != 0;
+
+       data = data_make("time", "", DATA_STRING, time_str,
+                        "model", "", DATA_STRING, "RF-tech",
+                        "id", "Id", DATA_INT, sensor_id,
+                        "battery", "Battery", DATA_STRING, battery ? "OK" : "LOW",
+                        "button", "Button", DATA_INT, button,
+                        "temperature", "Temperature", DATA_FORMAT, "%.01f C", DATA_DOUBLE, value,
+                        NULL);
+
+       data_acquired_handler(data);
+
+       return 1;
+    }
+
+    return 0;
+}
+
+/*
+ * List of fields to output when using CSV
+ *
+ * Used to determine what fields will be output in what
+ * order for this devince when using -F csv.
+ *
+ */
+static char *csv_output_fields[] = {
+       "time",
+       "model",
+       "id",
+       "battery",
+       "button",
+       "temperature",
+       NULL
+};
+
+/*
+ * r_device - registers device/callback. see rtl_433_devices.h
+ *
+ */
+
+r_device rftech = {
+       .name           = "RF-tech",
+       .modulation     = OOK_PULSE_PPM_RAW,
+       .short_limit    = 3500,
+       .long_limit     = 5000,
+       .reset_limit    = 10000,
+       .json_callback  = &rftech_callback,
+       .disabled       = 1,
+       .demod_arg      = 0,
+       .fields         = csv_output_fields,
+};