X-Git-Url: https://git.rvb.name/rtl-433.git/blobdiff_plain/ca13278b24eb61443559bcb61e64627fba3d8823..6d15c6f967221af825cf84e3ed12b96c763b127b:/src/devices/s3318p.c

diff --git a/src/devices/s3318p.c b/src/devices/s3318p.c
new file mode 100644
index 0000000..9f6326d
--- /dev/null
+++ b/src/devices/s3318p.c
@@ -0,0 +1,146 @@
+#include "rtl_433.h"
+#include "data.h"
+#include "util.h"
+
+/* Conrad Electronics S3318P outdoor sensor
+ *
+ * Transmit Interval: every ~50s
+ * Message Format: 40 bits (10 nibbles)
+ *
+ *
+ * Nibble:    1   2    3   4    5   6    7   8    9   10
+ * Type:   PP IIIIIIII ??CCTTTT TTTTTTTT HHHHHHHH XB?????? PP
+ * BIT/8   00 01234567 01234567 01234567 01234567 01234567 00
+ * BIT/A   00 01234567 89012345 57890123 45678901 23456789 00
+ *            0          1          2          3
+ * I = sensor ID (changes on battery change)
+ * C = channel number
+ * T = temperature
+ * H = humidity
+ * X = tx-button pressed
+ * B = low battery
+ * P = Pre-/Postamble
+ * ? = unknown meaning
+ *
+ *
+ * [01] {42} 04 15 66 e2 a1 00 : 00000100 00010101 01100110 11100010 10100001 00 ---> Temp/Hum/Ch:23.2/46/1
+ *
+ * Temperature:
+ * Sensor sends data in °F, lowest supported value is 90°F
+ * 12 bit uingned and scaled by 10 (Nibbles: 6,5,4)
+ * in this case "011001100101" =  1637/10 - 90 = 73.7 °F (23.17 °C)
+ *
+ * Humidity:
+ * 8 bit unsigned (Nibbles 8,7)
+ * in this case "00101110" = 46
+ *
+ * Channel number: (Bits 10,11) + 1
+ * in this case "00" --> "00" +1 = Channel1
+ *
+ * Battery status: (Bit 33) (0 normal, 1 voltage is below ~2.7 V)
+ * TX-Button: (Bit 32) (0 indicates regular transmission, 1 indicates requested by pushbutton)
+ *
+ * Rolling Code / Device ID: (Nibble 1)
+ * changes on every battery change
+ *
+ * Unknown1: (Bits 8,9) changes not so often
+ * Unknown2: (Bits 36-39) changes with every packet, probably checksum
+ * Unknown3: (Bits 34,35) changes not so often, mayby also part of the checksum
+ *
+ */
+
+
+static int s3318p_callback(bitbuffer_t *bitbuffer) {
+    bitrow_t *bb = bitbuffer->bb;
+    data_t *data;
+    char time_str[LOCAL_TIME_BUFLEN];
+
+    /* Get time now */
+    local_time_str(0, time_str);
+
+    /* Reject codes of wrong length */
+    if ( 42 != bitbuffer->bits_per_row[1])
+      return 0;
+
+    /* shift all the bits left 2 to align the fields */
+    int i;
+    for (i = 0; i < BITBUF_COLS-1; i++) {
+      uint8_t bits1 = bb[1][i] << 2;
+      uint8_t bits2 = (bb[1][i+1] & 0xC0) >> 6;
+      bits1 |= bits2;
+      bb[1][i] = bits1;
+    }
+
+    uint8_t humidity;
+    uint8_t button;
+    uint8_t battery_low;
+    uint8_t channel;
+    uint8_t sensor_id;
+    uint16_t temperature_with_offset;
+    float temperature_f;
+
+    /* IIIIIIII ??CCTTTT TTTTTTTT HHHHHHHH XB?????? PP */
+    humidity = (uint8_t)(((bb[1][3] & 0x0F) << 4) | ((bb[1][3] & 0xF0) >> 4));
+    button = (uint8_t)(bb[1][4] >> 7);
+    battery_low = (uint8_t)((bb[1][4] & 0x40) >> 6);
+    channel = (uint8_t)(((bb[1][1] & 0x30) >> 4) + 1);
+    sensor_id = (uint8_t)(bb[1][0]);
+
+    temperature_with_offset = ((bb[1][2] & 0x0F) << 8) | (bb[1][2] & 0xF0) | (bb[1][1] & 0x0F);
+    temperature_f = (temperature_with_offset - 900) / 10.0;
+
+    if (debug_output) {
+      bitbuffer_print(bitbuffer);
+      fprintf(stderr, "Sensor ID            = %2x\n",  sensor_id);
+      fprintf(stdout, "Bitstream HEX        = %02x %02x %02x %02x %02x %02x\n",bb[1][0],bb[1][1],bb[1][2],bb[1][3],bb[1][4],bb[1][5]);
+      fprintf(stdout, "Humidity HEX         = %02x\n", bb[1][3]);
+      fprintf(stdout, "Humidity DEC         = %u\n",   humidity);
+      fprintf(stdout, "Button               = %d\n",   button);
+      fprintf(stdout, "Battery Low          = %d\n",   battery_low);
+      fprintf(stdout, "Channel HEX          = %02x\n", bb[1][1]);
+      fprintf(stdout, "Channel              = %u\n",   channel);
+      fprintf(stdout, "temp_with_offset HEX = %02x\n", temperature_with_offset);
+      fprintf(stdout, "temp_with_offset     = %d\n",   temperature_with_offset);
+      fprintf(stdout, "TemperatureF         = %.1f\n", temperature_f);
+    }
+
+    data = data_make("time",          "",            DATA_STRING, time_str,
+                     "model",         "",            DATA_STRING, "S3318P Temperature & Humidity Sensor",
+                     "id",            "House Code",  DATA_INT, sensor_id,
+                     "channel",       "Channel",     DATA_INT, channel,
+                     "battery",       "Battery",     DATA_STRING, battery_low ? "LOW" : "OK",
+                     "button",        "Button",      DATA_INT, button,
+                     "temperature_F", "Temperature", DATA_FORMAT, "%.02f F", DATA_DOUBLE, temperature_f,
+                     "humidity",      "Humidity",    DATA_FORMAT, "%u %%", DATA_INT, humidity,
+                      NULL);
+
+    data_acquired_handler(data);
+
+    return 0;
+}
+
+static char *output_fields[] = {
+    "time",
+    "model",
+    "id",
+    "channel",
+    "battery",
+    "button",
+    "temperature_C",
+    "humidity",
+    NULL
+};
+
+
+r_device s3318p = {
+    .name           = "S3318P Temperature & Humidity Sensor",
+    .modulation     = OOK_PULSE_PPM_RAW,
+    .short_limit    = 2800,
+    .long_limit     = 4400,
+    .reset_limit    = 8000,
+    .json_callback  = &s3318p_callback,
+    .disabled       = 0,
+    .demod_arg      = 0,
+    .fields         = output_fields
+};
+