mirror of
https://github.com/DarkFlippers/unleashed-firmware
synced 2024-12-19 01:03:22 +00:00
68 lines
2.6 KiB
C
68 lines
2.6 KiB
C
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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" "01100110" "10010110" "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}, deviceid[2] = {0}, hum[2] = {0};
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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] = (bitmap_get(buffer,8,j+0) |
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bitmap_get(buffer,8,j+1) << 1 |
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bitmap_get(buffer,8,j+2) << 2 |
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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: deviceid[0] |= nib[0]; break;
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case 0: deviceid[0] |= nib[0] << 4; break;
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case 3: deviceid[1] |= nib[0]; break;
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case 2: deviceid[1] |= nib[0] << 4; break;
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case 10: temp[0] = nib[0]; break;
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/* Fixme: take the temperature sign from nibble 11. */
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case 9: temp[1] = nib[0]; break;
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case 8: temp[2] = nib[0]; break;
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case 13: hum[0] = nib[0]; break;
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case 12: hum[1] = nib[0]; break;
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}
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}
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snprintf(info->name,sizeof(info->name),"%s","Oregon v2.1");
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/* The following line crashes the Flipper because of broken
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* snprintf() implementation. */
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snprintf(info->raw,sizeof(info->raw),"%02X%02X%02X%02X%02X%02X%02X%02X",
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raw[0],raw[1],raw[2],raw[3],raw[4],raw[5],
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raw[6],raw[7]);
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snprintf(info->info1,sizeof(info->info1),"Sensor ID %02X%02X",
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deviceid[0], deviceid[1]);
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snprintf(info->info2,sizeof(info->info2),"Temperature %d%d.%d",
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temp[0],temp[1],temp[2]);
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snprintf(info->info3,sizeof(info->info3),"Humidity %d%d",
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hum[0],hum[1]);
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return true;
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}
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ProtoViewDecoder Oregon2Decoder = {
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"Oregon2", decode
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};
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