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Fix NovaSDS sensor Checksum failure

This commit is contained in:
Norbert Richter 2018-11-17 12:47:44 +01:00
parent b57ed00d29
commit e07cd3e48b
1 changed files with 13 additions and 17 deletions
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30
sonoff/xsns_20_novasds.ino
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@ -32,6 +32,9 @@
#ifndef WORKING_PERIOD
#define WORKING_PERIOD 5
#endif
#ifndef XSNS_20_QUERY_INTERVAL
#define XSNS_20_QUERY_INTERVAL 3 // query every 3 seconds
#endif
TasmotaSerial *NovaSdsSerial;
@ -58,15 +61,15 @@ void NovaSdsSetWorkPeriod(void)
novasds_workperiod[4] = WORKING_PERIOD;
novasds_workperiod[17] = ((novasds_workperiod[2] + novasds_workperiod[3] + novasds_workperiod[4] + novasds_workperiod[15] + novasds_workperiod[16]) & 0xFF); //checksum
NovaSdsSerial->write(novasds_workperiod, sizeof(novasds_workperiod));
NovaSdsSerial->flush();
NovaSdsSerial->write(novasds_workperiod, sizeof(novasds_workperiod));
while (NovaSdsSerial->available() > 0) {
NovaSdsSerial->read();
}
NovaSdsSerial->write(novasds_setquerymode, sizeof(novasds_setquerymode));
NovaSdsSerial->flush();
NovaSdsSerial->write(novasds_setquerymode, sizeof(novasds_setquerymode));
while (NovaSdsSerial->available() > 0) {
NovaSdsSerial->read();
@ -77,23 +80,16 @@ bool NovaSdsReadData(void)
{
if (! NovaSdsSerial->available()) return false;
byte d[10] = { 0 };
NovaSdsSerial->flush();
NovaSdsSerial->write(novasds_querydata, sizeof(novasds_querydata));
NovaSdsSerial->flush();
NovaSdsSerial->readBytes(d, 10);
while ((NovaSdsSerial->peek() != 0xAA) && NovaSdsSerial->available()) {
NovaSdsSerial->read();
}
AddLogSerial(LOG_LEVEL_DEBUG_MORE, d, 10);
byte d[8] = { 0 };
NovaSdsSerial->read(); // skip 0xAA
NovaSdsSerial->readBytes(d, 8);
NovaSdsSerial->flush();
AddLogSerial(LOG_LEVEL_DEBUG_MORE, d, 8);
if (d[7] == ((d[1] + d[2] + d[3] + d[4] + d[5] + d[6]) & 0xFF)) {
novasds_data.pm25 = (d[1] + 256 * d[2]);
novasds_data.pm100 = (d[3] + 256 * d[4]);
if (d[0] == 0xAA && d[9] == 0xAB && (d[8] == ((d[2] + d[3] + d[4] + d[5] + d[6] + d[7]) & 0xFF))) {
novasds_data.pm25 = (d[2] + 256 * d[3]);
novasds_data.pm100 = (d[4] + 256 * d[5]);
} else {
AddLog_P(LOG_LEVEL_DEBUG, PSTR("SDS: " D_CHECKSUM_FAILURE));
return false;
@ -110,7 +106,7 @@ void NovaSdsSecond(void) // Every second
if (!novasds_valid) {
NovaSdsSetWorkPeriod();
}
} else {
} else if (0 == (uptime % XSNS_20_QUERY_INTERVAL)) { // Every 5 seconds
if (NovaSdsReadData()) {
novasds_valid = 10;
} else {