X-Git-Url: https://git.rvb.name/rtl-433.git/blobdiff_plain/7771049ddd733b759484442a3b10ade8faea75ff..337eb4ba945097205fbb6a3ca7912fb0697092d1:/src/devices/alecto.c

diff --git a/src/devices/alecto.c b/src/devices/alecto.c
new file mode 100644
index 0000000..00673ab
--- /dev/null
+++ b/src/devices/alecto.c
@@ -0,0 +1,161 @@
+#include "rtl_433.h"
+
+/* Documentation also at http://www.tfd.hu/tfdhu/files/wsprotocol/auriol_protocol_v20.pdf
+ * Message Format: (9 nibbles, 36 bits):
+ * Please note that bytes need to be reversed before processing!
+ *
+ * Format for Temperature Humidity
+ *   AAAAAAAA BBBB CCCC CCCC CCCC DDDDDDDD EEEE
+ *   RC       Type Temperature___ Humidity Checksum
+ *   A = Rolling Code / Device ID
+ *       Device ID: AAAABBAA BB is used for channel, base channel is 01
+ *       When channel selector is used, channel can be 10 (2) and 11 (3)
+ *   B = Message type (xyyz = temp/humidity if yy <> '11') else wind/rain sensor
+ *       x indicates battery status (0 normal, 1 voltage is below ~2.6 V)
+ *       z 0 indicates regular transmission, 1 indicates requested by pushbutton
+ *   C = Temperature (two's complement)
+ *   D = Humidity BCD format
+ *   E = Checksum
+ *
+ * Format for Rain
+ *   AAAAAAAA BBBB CCCC DDDD DDDD DDDD DDDD EEEE
+ *   RC       Type      Rain                Checksum
+ *   A = Rolling Code /Device ID
+ *   B = Message type (xyyx = NON temp/humidity data if yy = '11')
+ *   C = fixed to 1100
+ *   D = Rain (bitvalue * 0.25 mm)
+ *   E = Checksum
+ *
+ * Format for Windspeed
+ *   AAAAAAAA BBBB CCCC CCCC CCCC DDDDDDDD EEEE
+ *   RC       Type                Windspd  Checksum
+ *   A = Rolling Code
+ *   B = Message type (xyyx = NON temp/humidity data if yy = '11')
+ *   C = Fixed to 1000 0000 0000
+ *   D = Windspeed  (bitvalue * 0.2 m/s, correction for webapp = 3600/1000 * 0.2 * 100 = 72)
+ *   E = Checksum
+ *
+ * Format for Winddirection & Windgust
+ *   AAAAAAAA BBBB CCCD DDDD DDDD EEEEEEEE FFFF
+ *   RC       Type      Winddir   Windgust Checksum
+ *   A = Rolling Code
+ *   B = Message type (xyyx = NON temp/humidity data if yy = '11')
+ *   C = Fixed to 111
+ *   D = Wind direction
+ *   E = Windgust (bitvalue * 0.2 m/s, correction for webapp = 3600/1000 * 0.2 * 100 = 72)
+ *   F = Checksum
+ *********************************************************************************************
+ */
+uint8_t reverse8(uint8_t x) {
+    x = (x & 0xF0) >> 4 | (x & 0x0F) << 4;
+    x = (x & 0xCC) >> 2 | (x & 0x33) << 2;
+    x = (x & 0xAA) >> 1 | (x & 0x55) << 1;
+    return x;
+}
+
+uint8_t bcd_decode8(uint8_t x) {
+    return ((x & 0xF0) >> 4) * 10 + (x & 0x0F);
+}
+
+static int alectov1_callback(uint8_t bb[BITBUF_ROWS][BITBUF_COLS], int16_t bits_per_row[BITBUF_ROWS]) {
+    int temperature_before_dec;
+    int temperature_after_dec;
+    int16_t temp;
+    uint8_t humidity, csum = 0, csum2 = 0;
+    int i;
+    if (bb[1][0] == bb[5][0] && bb[2][0] == bb[6][0] && (bb[1][4] & 0xf) == 0 && (bb[5][4] & 0xf) == 0
+            && (bb[5][0] != 0 && bb[5][1] != 0)) {
+
+        for (i = 0; i < 4; i++) {
+            uint8_t tmp = reverse8(bb[1][i]);
+            csum += (tmp & 0xf) + ((tmp & 0xf0) >> 4);
+
+            tmp = reverse8(bb[5][i]);
+            csum2 += (tmp & 0xf) + ((tmp & 0xf0) >> 4);
+        }
+
+        csum = ((bb[1][1] & 0x7f) == 0x6c) ? (csum + 0x7) : (0xf - csum);
+        csum2 = ((bb[5][1] & 0x7f) == 0x6c) ? (csum2 + 0x7) : (0xf - csum2);
+
+        csum = reverse8((csum & 0xf) << 4);
+        csum2 = reverse8((csum2 & 0xf) << 4);
+        /* Quit if checksup does not work out */
+        if (csum != (bb[1][4] >> 4) || csum2 != (bb[5][4] >> 4)) {
+            fprintf(stderr, "\nAlectoV1 CRC error");
+            return 0;
+        } //Invalid checksum
+
+
+        uint8_t wind = 0;
+
+        if ((bb[1][1] & 0xe0) == 0x60) {
+            wind = ((bb[1][1] & 0xf) == 0xc) ? 0 : 1;
+
+            fprintf(stdout, "SENSOR:TYPE=ALECTO_%s,", wind ? "WIND" : "RAIN_GAUGE");
+            fprintf(stdout, "ID=%d,", reverse8(bb[1][0]));
+            fprintf(stdout, "BUTTON=%d,", bb[1][1]&0x10 ? 1 : 0);
+            fprintf(stdout, "BATTERY=%s,", bb[1][1]&0x80 ? "LOW" : "OK");
+            if (wind) {
+                int skip = -1;
+                /* Untested code written according to the specification, may not decode correctly  */
+                if ((bb[1][1]&0xe) == 0x8 && bb[1][2] == 0) {
+                    skip = 0;
+                } else if ((bb[1][1]&0xe) == 0xe) {
+                    skip = 4;
+                } //According to supplied data!
+                if (skip >= 0) {
+                    double speed = reverse8(bb[1 + skip][3]);
+                    double gust = reverse8(bb[5 + skip][3]);
+                    int direction = (reverse8(bb[5 + skip][2]) << 1) | (bb[5 + skip][1] & 0x1);
+                    fprintf(stdout, "WINDSPEED=%.0f,", speed);
+                    fprintf(stdout, "WINDGUST=%.0f,", gust);
+                    fprintf(stdout, "WINDDIRECTION=%.2i\n", direction);
+                }
+            } else {
+                /* Untested code written according to the specification, may not decode correctly  */
+                double rain_mm = (reverse8(bb[1][2]) + (reverse8(bb[1][3] << 8))) * 0.25;
+                fprintf(stdout, "RAINFALL=%f\n", rain_mm);
+            }
+        } else if (bb[2][0] == bb[3][0] && bb[3][0] == bb[4][0] && bb[4][0] == bb[5][0] &&
+                bb[5][0] == bb[6][0] && (bb[3][4] & 0xf) == 0 && (bb[5][4] & 0xf) == 0) {
+            //static char * temp_states[4] = {"stable", "increasing", "decreasing", "invalid"};
+            temp = (int16_t) ((uint16_t) (reverse8(bb[1][1]) >> 4) | (reverse8(bb[1][2]) << 4));
+            if ((temp & 0x800) != 0) {
+                temp |= 0xf000;
+            }
+            temperature_before_dec = abs(temp / 10);
+            temperature_after_dec = abs(temp % 10);
+            humidity = bcd_decode8(reverse8(bb[1][3]));
+            fprintf(stdout, "SENSOR:TYPE=ALECTO_TEMP,");
+            fprintf(stdout, "ID=%d,", reverse8(bb[1][0]));
+            fprintf(stdout, "CHANNEL== %d,", (bb[1][0] & 0xc) >> 2);
+            fprintf(stdout, "BUTTON=%d,", bb[1][1]&0x10 ? 1 : 0);
+            fprintf(stdout, "BATTERY=%s,", bb[1][1]&0x80 ? "Low" : "OK");
+            fprintf(stdout, "TEMPERATURE=%s%d.%d,", temp < 0 ? "-" : "", temperature_before_dec, temperature_after_dec);
+            fprintf(stdout, "HUMIDITY=%d\n", humidity);
+        }
+        fprintf(stderr, "Checksum      = %01x (calculated %01x)\n", bb[1][4] >> 4, csum);
+
+        fprintf(stderr, "Received Data = %02x %02x %02x %02x %02x\n", bb[1][0], bb[1][1], bb[1][2], bb[1][3], bb[1][4]);
+        if (wind) fprintf(stderr, "Rcvd Data 2   = %02x %02x %02x %02x %02x\n", bb[5][0], bb[5][1], bb[5][2], bb[5][3], bb[5][4]);
+        /*
+         * fprintf(stderr, "L2M: %02x %02x %02x %02x %02x\n",reverse8(bb[1][0]),reverse8(bb[1][1]),reverse8(bb[1][2]),reverse8(bb[1][3]),reverse8(bb[1][4]));
+         */
+        if (debug_output)
+            debug_callback(bb, bits_per_row);
+
+        return 1;
+    }
+    return 0;
+}
+
+//Timing based on 250000
+r_device alectov1 = {
+    /* .id             = */ 13,
+    /* .name           = */ "AlectoV1 Weather Sensor",
+    /* .modulation     = */ OOK_PWM_D,
+    /* .short_limit    = */ 3500 / 4, //875
+    /* .long_limit     = */ 7000 / 4, //1750
+    /* .reset_limit    = */ 15000 / 4, //3750
+    /* .json_callback  = */ &alectov1_callback,
+};