X-Git-Url: https://git.rvb.name/rtl-433.git/blobdiff_plain/ca13278b24eb61443559bcb61e64627fba3d8823..6d15c6f967221af825cf84e3ed12b96c763b127b:/src/devices/xc0348.c

diff --git a/src/devices/xc0348.c b/src/devices/xc0348.c
new file mode 100644
index 0000000..3bc4ae6
--- /dev/null
+++ b/src/devices/xc0348.c
@@ -0,0 +1,110 @@
+/*
+ * Digitech XC0348 weather station
+ * Reports 1 row, 88 pulses
+ * Format: ff ID ?X XX YY ZZ ?? ?? ?? UU CC
+ * - ID: device id
+ * - ?X XX: temperature, likely in 0.1C steps (.1 e7 == 8.7C, .1 ef == 9.5C)
+ * - YY: percent in a single byte (for example 54 == 84%)
+ * - ZZ: wind speed (00 == 0, 01 == 1.1km/s, ...)
+ * - UU: wind direction: 00 is N, 02 is NE, 04 is E, etc. up to 0F is seems
+ * - CC: checksum
+ *
+ * still unknown - rain, pressure
+ */
+
+#include "data.h"
+#include "rtl_433.h"
+#include "util.h"
+
+#define CRC_POLY 0x31
+#define CRC_INIT 0xff
+
+static const char* wind_directions[] = {
+    "N", "NNE", "NE",
+    "ENE", "E", "ESE",
+    "SE", "SSE", "S", "SSW", "SW",
+    "WSW", "W", "WNW",
+    "NW", "NNW",
+};
+
+static float get_temperature(const uint8_t* br) {
+    const int temp_raw = (br[2] << 8) + br[3];
+    return ((temp_raw & 0x0fff) - 0x190) / 10.0;
+}
+
+static int get_humidity(const uint8_t* br) {
+    return br[4];
+}
+
+static const char* get_wind_direction(const uint8_t* br) {
+    return wind_directions[br[9] & 0x0f];
+}
+
+static float get_wind_speed(const uint8_t* br) {
+    return br[5] * 1.1f;
+}
+
+static int digitech_ws_callback(bitbuffer_t *bitbuffer) {
+    data_t *data;
+    char time_str[LOCAL_TIME_BUFLEN];
+    local_time_str(0, time_str);
+
+    if (bitbuffer->num_rows != 1) {
+        return 0;
+    }
+    if (bitbuffer->bits_per_row[0] != 88) {
+        return 0;
+    }
+
+	const uint8_t *br = bitbuffer->bb[0];
+
+    if (br[0] != 0xff) {
+        // preamble missing
+        return 0;
+    }
+
+    if (br[10] != crc8(br, 10, CRC_POLY, CRC_INIT)) {
+        // crc mismatch
+        return 0;
+    }
+
+    const float temperature = get_temperature(br);
+    const int humidity = get_humidity(br);
+    const char* direction = get_wind_direction(br);
+    const float speed = get_wind_speed(br);
+    const char device_id = br[1];
+
+    data = data_make("time",          "",               DATA_STRING, time_str,
+                     "model",         "",               DATA_STRING, "Digitech XC0348 weather station",
+                     "id",            "",               DATA_INT,    device_id,
+                     "temperature_C", "Temperature",    DATA_DOUBLE, temperature,
+                     "humidity",      "Humidity",       DATA_INT,    humidity,
+                     "direction",     "Wind direction", DATA_STRING, direction,
+                     "speed",         "Wind speed",     DATA_DOUBLE, speed,
+                     NULL);
+    data_acquired_handler(data);
+    return 1;
+}
+
+static char *output_fields[] = {
+	"time",
+	"model",
+	"id",
+	"temperature_C",
+	"humidity",
+	"direction",
+	"speed",
+	NULL
+};
+
+r_device digitech_ws = {
+    .name           = "Digitech XC0348 Weather Station",
+    .modulation     = OOK_PULSE_PWM_RAW,
+    .short_limit    = 976,
+    .long_limit     = 2400,
+    .reset_limit    = 10520,
+    .json_callback  = &digitech_ws_callback,
+    .disabled       = 0,
+    .demod_arg      = 0,
+    .fields         = output_fields,
+};