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Add Battery Level for Fineoffset WH0290 Wireless Air Quality Monitor (#1617)

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peteakalad
2021-01-18 05:43:02 +00:00
committed by GitHub
parent 8d933b9d7f
commit 5cbb2a292f
1 changed files with 13 additions and 4 deletions
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17
src/devices/fineoffset.c
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@@ -330,6 +330,7 @@ static int fineoffset_WH24_callback(r_device *decoder, bitbuffer_t *bitbuffer)
/**
Fine Offset Electronics WH0290 Wireless Air Quality Monitor
Also: Ambient Weather PM25
Also: Misol PM25
The sensor sends a package each ~10m. The bits are PCM modulated with Frequency Shift Keying.
@@ -339,14 +340,20 @@ Data layout:
- F: 8 bit Family Code?
- D: 8 bit device id?
- ?: 2 bits ?
- ?: 1 bit?
- b: 1 bit MSB of battery bars out of 5
- P: 14 bit PM2.5 reading in ug/m3
- ?: 2 bits ?
- b: 2 bits LSBs of battery bars out of 5
- A: 14 bit PM10.0 reading in ug/m3
- ?: 8 bits ?
- C: 8 bit CRC checksum of the previous 6 bytes
- B: 8 bit Bitsum (sum without carry, XOR) of the previous 7 bytes
BitBench Examples
{129} 55 55 55 55 55 51 6e a2 0c ba 02 d0 03 25 13 c0 00 [pm2=9 pm10=10 id=151 0x97 battery 4/5bars]
{128} 55 55 55 55 55 51 6e a2 0c ba 03 70 03 c3 43 30 [pm2=11 pm10=12 id=151 0x97 battery 4/5bars]
{129} 55 55 55 55 55 51 6e a2 0c b8 01 46 01 94 9c 2c 00 [pm2=4 pm10=5 id=151 0x97 3/5 bars]
Preamble: aa2dd4
FAM:8d ID: 8h 1b Bat_MSB:1d PMTWO:14d Bat_LSB:2d PMTEN:14d CRC:8h BITSIM:8h bbbbb
*/
static int fineoffset_WH0290_callback(r_device *decoder, bitbuffer_t *bitbuffer)
{
@@ -380,12 +387,14 @@ static int fineoffset_WH0290_callback(r_device *decoder, bitbuffer_t *bitbuffer)
uint8_t id = b[1];
int pm25 = (b[2] & 0x3f) << 8 | b[3];
int pm100 = (b[4] & 0x3f) << 8 | b[5];
int battery_bars = (b[2] & 0x40) >> 4 | (b[4] & 0xC0) >> 6; //out of 5
float battery_ok = battery_bars * 0.2f; //convert out of 5 bars to 0 (0 bars) to 1 (5 bars)
/* clang-format off */
data = data_make(
"model", "", DATA_STRING, _X("Fineoffset-WH0290","Fine Offset Electronics, WH0290"),
"id", "ID", DATA_INT, id,
"battery_ok", "Battery Level", DATA_FORMAT, "%.1f", DATA_DOUBLE, battery_ok,
"pm2_5_ug_m3", "2.5um Fine Particulate Matter", DATA_FORMAT, "%i ug/m3", DATA_INT, pm25/10,
"pm10_0_ug_m3", "10um Coarse Particulate Matter", DATA_FORMAT, "%i ug/m3", DATA_INT, pm100/10,
"mic", "Integrity", DATA_STRING, "CRC",