Scmplus (#1410)

Added SCM+ decoder.

README.md

@@ -227,6 +227,7 @@ See [CONTRIBUTING.md](./docs/CONTRIBUTING.md).
     [151]  Visonic powercode
     [152]  Eurochron EFTH-800 temperature and humidity sensor
     [153]  Cotech 36-7959 wireless weather station with USB
+    [154]  Standard Consumption Message Plus (SCMplus)
 
 * Disabled by default, use -R n or -G
 

include/rtl_433_devices.h

@@ -161,6 +161,7 @@
     DECL(visonic_powercode) \
     DECL(eurochron_efth800) \
     DECL(cotech_36_7959) \
+    DECL(scmplus) \
 
     /* Add new decoders here. */
 

man/man1/rtl_433.1

@@ -580,6 +580,9 @@ Eurochron EFTH\-800 temperature and humidity sensor
 .TP
 [ \fB153\fI\fP ]
 Cotech 36\-7959 wireless weather station with USB
+.TP
+[ \fB154\fI\fP ]
+Standard Consumption Message Plus (SCMplus)
 
 * Disabled by default, use \-R n or \-G
 .SS "Input device selection"

src/CMakeLists.txt

@@ -129,6 +129,7 @@ add_library(r_433 STATIC
     devices/rubicson_48659.c
     devices/s3318p.c
     devices/schraeder.c
+    devices/scmplus.c
     devices/silvercrest.c
     devices/simplisafe.c
     devices/smoke_gs558.c

src/Makefile.am

@@ -128,6 +128,7 @@ rtl_433_SOURCES      = abuf.c \
                        devices/rubicson_48659.c \
                        devices/s3318p.c \
                        devices/schraeder.c \
+                       devices/scmplus.c \
                        devices/silvercrest.c \
                        devices/simplisafe.c \
                        devices/smoke_gs558.c \

src/devices/scmplus.c

@@ -0,0 +1,200 @@
+/** @file
+    ERT SCM+ sensors.
+
+    Copyright (C) 2020 Peter Shipley <peter.shipley@gmail.com>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+*/
+
+// #include <arpa/inet.h>
+#include "decoder.h"
+
+/**
+
+Freq 912600155
+
+Random information:
+
+https://github.com/bemasher/rtlamr/wiki/Protocol
+http://www.gridinsight.com/community/documentation/itron-ert-technology/
+
+Units: "Some meter types transmit consumption in 1 kWh units, while others use more granular 10 Wh units"
+
+
+*/
+
+static int scmplus_callback(r_device *decoder, bitbuffer_t *bitbuffer)
+{
+    uint8_t b[16];
+    data_t *data;
+    unsigned sync_index;
+    const uint8_t scmplus_frame_sync[] = {0x16, 0xA3, 0x1E};
+
+    if (bitbuffer->bits_per_row[0] < 128) {
+        return (DECODE_ABORT_LENGTH);
+    }
+
+    sync_index = bitbuffer_search(bitbuffer, 0, 0, scmplus_frame_sync, 24);
+
+    if (sync_index >= bitbuffer->bits_per_row[0]) {
+        return DECODE_ABORT_EARLY;
+    }
+
+    if ( (bitbuffer->bits_per_row[0] - sync_index) < 128) {
+        return DECODE_ABORT_LENGTH;
+    }
+
+    if (decoder->verbose) {
+        fprintf(stderr, "%s: row len=%hu\n", __func__, bitbuffer->bits_per_row[0]);
+        fprintf(stderr, "%s: sync_index=%d\n", __func__, sync_index);
+    }
+
+    // bitbuffer_debug(bitbuffer);
+    bitbuffer_extract_bytes(bitbuffer, 0, sync_index, b, 16 * 8);
+
+
+    // uint32_t t_16; // temp vars
+    // uint32_t t_32;
+
+    uint16_t crc, pkt_checksum;
+    // memcpy(&t_16, &b[14], 2);
+    // pkt_checksum = ntohs(t_16);
+    pkt_checksum = (b[14] << 8 | b[15]);
+
+
+    crc = crc16(&b[2], 12, 0x1021, 0x0971);
+    // fprintf(stderr, "CRC = %d %04X == %d %04X\n", pkt_checksum,pkt_checksum,  crc, crc);
+    if (crc != pkt_checksum) {
+        return DECODE_FAIL_MIC;
+    }
+
+    if (decoder->verbose) { // print bytes with aligned offset
+        bitrow_printf(b, 16 * 8, "%s bitrow_printf", __func__);
+    }
+
+    // uint8_t protocol_id;
+    uint32_t endpoint_id;
+    // uint8_t endpoint_type;
+    uint32_t consumption_data;
+    uint16_t physical_tamper;
+
+    char crc_str[8];
+    char protocol_id_str[5];
+    char endpoint_type_str[5];
+    char physical_tamper_str[8];
+
+    // protocol_id = b[2];
+    snprintf(protocol_id_str, sizeof(protocol_id_str), "0x%02X", b[2]); // protocol_id);  // b[2]
+
+    // endpoint_type = b[3];
+    snprintf(endpoint_type_str, sizeof(endpoint_type_str), "0x%02X", b[3]); // endpoint_type);  // b[3]
+
+    // memcpy(&t_32, &b[4], 4);
+    // endpoint_id = ntohl(t_32);
+    endpoint_id = ((uint32_t)b[4] << 24) | (b[5] << 16) | (b[6] << 8) | (b[7]);
+
+    // memcpy(&t_32, &b[8], 4);
+    // consumption_data = ntohl(t_32);
+    consumption_data = ((uint32_t)b[8] << 24) | (b[9] << 16) | (b[10] << 8) | (b[11]);
+
+    // memcpy(&t_16, &b[12], 2);
+    // physical_tamper = ntohs(t_16);
+    // physical_tamper = ((t_16 & 0xFF00) >> 8 | (t_16 & 0x00FF) << 8);
+    physical_tamper = (b[12] << 8 | b[13]);
+    snprintf(physical_tamper_str, sizeof(physical_tamper_str), "0x%04X", physical_tamper);
+
+    snprintf(crc_str, sizeof(crc_str), "0x%04X", crc);
+
+    /*
+    if (decoder->verbose && 0) {
+        fprintf(stderr, "protocol_id = %d %02X\n", protocol_id,protocol_id);
+        bitrow_printf(&b[3], 8, "%s\t%2d\t%02X\t", "endpoint_type   ", endpoint_type, endpoint_type);
+        bitrow_printf(&b[4], 32, "%s\t%2d\t%02X\t", "endpoint_id    ", endpoint_id, endpoint_id);
+        bitrow_printf(&b[8], 32, "%s\t%2d\t%02X\t", "consumption_data", consumption_data, consumption_data);
+        // fprintf(stderr, "consumption_data = %d %08X\n", consumption_data,consumption_data);
+        fprintf(stderr, "physical_tamper = %d %04X\n", physical_tamper,physical_tamper);
+        fprintf(stderr, "pkt_checksum = %d %04X\n", pkt_checksum,pkt_checksum);
+    }
+    */
+
+    // Least significant nibble of endpoint_type is  equivalent to SCM's endpoint type field
+    // id info from https://github.com/bemasher/rtlamr/wiki/Compatible-Meters
+    char *meter_type;
+    switch (b[3] & 0x0f) {
+        case 4:
+        case 5:
+        case 7:
+        case 8:
+            meter_type = "Electric";
+            break;
+        case 2:
+        case 9:
+        case 12:
+            meter_type = "Gas";
+            break;
+        case 11:
+        case 13:
+            meter_type = "Water";
+            break;
+        default:
+            meter_type = "unknown";
+            break;
+    }
+    // fprintf(stderr, "meter_type = %s\n", meter_type);
+
+    /* 
+        Field key names and format set to  match rtlamr field names 
+
+        {Time:2020-06-20T09:58:19.074 Offset:49152 Length:49152
+        SCM+:{ProtocolID:0x1E EndpointType:0xAB EndpointID:  68211547 Consumption:  6883 Tamper:0x4900 PacketCRC:0x39BE}}
+    */
+
+    /* clang-format off */
+    data = data_make(
+            "model",           "",                 DATA_STRING, "SCM+",
+            "ProtocolID",     "Protocol_ID",       DATA_STRING, protocol_id_str,
+            "EndpointType",   "Endpoint_Type",     DATA_STRING, endpoint_type_str,
+            "EndpointID",     "Endpoint_ID",       DATA_INT,    endpoint_id,
+            "Consumption",     "",                 DATA_INT,    consumption_data,
+            "Tamper",          "",                 DATA_STRING, physical_tamper_str,
+            "PacketCRC",       "crc",              DATA_STRING, crc_str,
+            "MeterType",       "Meter_Type",       DATA_STRING, meter_type,
+            "mic",             "Integrity",        DATA_STRING, "CRC",
+            NULL);
+    /* clang-format on */
+
+
+    decoder_output_data(decoder, data);
+    return 1;
+}
+
+static char *output_fields[] = {
+        "model",
+        "ProtocolID",
+        "EndpointType",
+        "EndpointID",
+        "Consumption",
+        "Tamper",
+        "PacketCRC",
+        "MeterType",
+        "mic",
+        NULL,
+};
+
+//      Freq 912600155
+//     -X n=L58,m=OOK_MC_ZEROBIT,s=30,l=30,g=20000,r=20000,match={24}0x16a31e,preamble={1}0x00
+
+r_device scmplus = {
+        .name        = "Standard Consumption Message Plus (SCMplus)",
+        .modulation  = OOK_PULSE_MANCHESTER_ZEROBIT,
+        .short_width = 30,
+        .long_width  = 30,
+        .gap_limit   = 0,
+        .reset_limit = 64,
+        .decode_fn   = &scmplus_callback,
+        .disabled    = 0,
+        .fields      = output_fields,
+};

vs15/rtl_433.vcxproj

@@ -252,6 +252,7 @@ COPY ..\..\libusb\MS64\dll\libusb*.dll $(TargetDir)</Command>
     <ClCompile Include="..\src\devices\rubicson_48659.c" />
     <ClCompile Include="..\src\devices\s3318p.c" />
     <ClCompile Include="..\src\devices\schraeder.c" />
+    <ClCompile Include="..\src\devices\scmplus.c" />
     <ClCompile Include="..\src\devices\silvercrest.c" />
     <ClCompile Include="..\src\devices\simplisafe.c" />
     <ClCompile Include="..\src\devices\smoke_gs558.c" />

vs15/rtl_433.vcxproj.filters

@@ -493,6 +493,9 @@
     <ClCompile Include="..\src\devices\schraeder.c">
       <Filter>Source Files\devices</Filter>
     </ClCompile>
+    <ClCompile Include="..\src\devices\scmplus.c">
+      <Filter>Source Files\devices</Filter>
+    </ClCompile>
     <ClCompile Include="..\src\devices\silvercrest.c">
       <Filter>Source Files\devices</Filter>
     </ClCompile>