mirror of
https://github.com/DarkFlippers/unleashed-firmware.git
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85 lines
2.9 KiB
C
85 lines
2.9 KiB
C
/* Copyright (C) 2022-2023 Salvatore Sanfilippo -- All Rights Reserved
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* See the LICENSE file for information about the license.
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*
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* Oregon remote termometers. Usually 443.92 Mhz OOK.
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*
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* The protocol is described here:
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* https://wmrx00.sourceforge.net/Arduino/OregonScientific-RF-Protocols.pdf
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* This implementation is not very complete. */
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#include "../app.h"
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static bool decode(uint8_t* bits, uint32_t numbytes, uint32_t numbits, ProtoViewMsgInfo* info) {
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if(numbits < 32) return false;
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const char* sync_pattern = "01100110"
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"01100110"
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"10010110"
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"10010110";
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uint64_t off = bitmap_seek_bits(bits, numbytes, 0, numbits, sync_pattern);
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if(off == BITMAP_SEEK_NOT_FOUND) return false;
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FURI_LOG_E(TAG, "Oregon2 preamble+sync found");
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info->start_off = off;
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off += 32; /* Skip preamble. */
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uint8_t buffer[8], raw[8] = {0};
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uint32_t decoded =
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convert_from_line_code(buffer, sizeof(buffer), bits, numbytes, off, "1001", "0110");
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FURI_LOG_E(TAG, "Oregon2 decoded bits: %lu", decoded);
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if(decoded < 11 * 4) return false; /* Minimum len to extract some data. */
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info->pulses_count = (off + 11 * 4 * 4) - info->start_off;
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char temp[3] = {0}, hum[2] = {0};
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uint8_t deviceid[2];
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for(int j = 0; j < 64; j += 4) {
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uint8_t nib[1];
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nib[0] =
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(bitmap_get(buffer, 8, j + 0) | bitmap_get(buffer, 8, j + 1) << 1 |
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bitmap_get(buffer, 8, j + 2) << 2 | bitmap_get(buffer, 8, j + 3) << 3);
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if(DEBUG_MSG) FURI_LOG_E(TAG, "Not inverted nibble[%d]: %x", j / 4, (unsigned int)nib[0]);
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raw[j / 8] |= nib[0] << (4 - (j % 4));
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switch(j / 4) {
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case 1:
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deviceid[0] |= nib[0];
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break;
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case 0:
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deviceid[0] |= nib[0] << 4;
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break;
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case 3:
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deviceid[1] |= nib[0];
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break;
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case 2:
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deviceid[1] |= nib[0] << 4;
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break;
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case 10:
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temp[0] = nib[0];
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break;
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/* Fixme: take the temperature sign from nibble 11. */
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case 9:
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temp[1] = nib[0];
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break;
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case 8:
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temp[2] = nib[0];
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break;
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case 13:
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hum[0] = nib[0];
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break;
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case 12:
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hum[1] = nib[0];
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break;
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}
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}
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float tempval = ((temp[0] - '0') * 10) + (temp[1] - '0') + ((float)(temp[2] - '0') * 0.1);
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int humval = (hum[0] - '0') * 10 + (hum[1] - '0');
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fieldset_add_bytes(info->fieldset, "Sensor ID", deviceid, 4);
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fieldset_add_float(info->fieldset, "Temperature", tempval, 1);
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fieldset_add_uint(info->fieldset, "Humidity", humval, 7);
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return true;
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}
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ProtoViewDecoder Oregon2Decoder =
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{.name = "Oregon2", .decode = decode, .get_fields = NULL, .build_message = NULL};
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