--- /dev/null
+#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
+};
+
projects / rtl-433.git / blobdiff