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

diff --git a/src/devices/kedsum.c b/src/devices/kedsum.c
new file mode 100644
index 0000000..51d28b3
--- /dev/null
+++ b/src/devices/kedsum.c
@@ -0,0 +1,99 @@
+#include "rtl_433.h"
+#include "data.h"
+#include "util.h"
+
+/* Kedsum temperature and humidity sensor (http://amzn.to/25IXeng)
+   My models transmit at a bit lower freq. Around ~433.71 Mhz
+
+   Copyright (C) 2016 John Lifsey
+   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.
+
+   Largely based on prologue, esperanza_ews, s3318p
+   Frame appears to be a differently-endianed version of the esperanza
+
+   Frame structure:
+   IIIIIIII????CC++++ttttTTTThhhhHHHH?????? PP
+
+   IIIIIIII unique id. changes on powercycle
+   CC channel, 00 = ch1, 10=ch3
+   ++++ low temp nibble
+   tttt med temp nibble
+   TTTT high temp nibble
+   hhhh humidity low nibble
+   HHHH humidity high nibble
+*/
+
+
+static int kedsum_callback(bitbuffer_t *bitbuffer) {
+    bitrow_t *bb = bitbuffer->bb;
+    data_t *data;
+
+    char time_str[LOCAL_TIME_BUFLEN];
+    local_time_str(0, time_str);
+
+    int r = bitbuffer_find_repeated_row(bitbuffer, 6, 42);
+    if (r<0 || bitbuffer->bits_per_row[r] != 42 || bitbuffer->num_rows != 14)
+        return 0;
+
+    uint8_t *b = bb[r];
+
+    uint8_t humidity;
+    uint8_t channel;
+    uint16_t temperature_with_offset;
+    float temperature_f;
+
+    channel  = (uint8_t)(((b[1] & 0x0C) >> 2) + 1);
+    humidity = (uint8_t)((b[3] & 0x03) << 6) | ((b[4] & 0xC0) >> 2) | ((b[3] & 0x3C) >> 2);
+
+    uint8_t tnH, tnM, tnL;
+    tnL = ((b[1] & 0x03) << 2) | ((b[2] & 0xC0) >> 6); // Low temp nibble
+    tnM = ((b[2] & 0x3C) >> 2);                        // Med temp nibble
+    tnH = ((b[2] & 0x03) << 2) | ((b[3] & 0xC0) >> 6); // high temp nibble
+
+    temperature_with_offset =  (tnH<<8) | (tnM<<4) | tnL;
+    temperature_f = (temperature_with_offset - 900) / 10.0;
+
+    if (debug_output) {
+      fprintf(stdout, "Bitstream HEX        = %02x %02x %02x %02x %02x %02x\n",b[0],b[1],b[2],b[3],b[4],b[5]);
+      fprintf(stdout, "Humidity HEX         = %02x\n", b[3]);
+      fprintf(stdout, "Humidity DEC         = %u\n",   humidity);
+      fprintf(stdout, "Channel HEX          = %02x\n", b[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, "Kedsum Temperature & Humidity Sensor",
+                     "channel",       "Channel",     DATA_INT, channel,
+                     "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 1;
+}
+
+static char *output_fields[] = {
+    "time",
+    "model",
+    "channel",
+    "temperature_F",
+    "humidity",
+    NULL
+};
+
+r_device kedsum = {
+    .name           = "Kedsum Temperature & Humidity Sensor",
+    .modulation     = OOK_PULSE_PPM_RAW,
+    .short_limit    = 2800,
+    .long_limit     = 4400,
+    .reset_limit    = 8000,
+    .json_callback  = &kedsum_callback,
+    .disabled       = 0,
+    .demod_arg      = 0,
+    .fields         = output_fields
+};