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Refactor DHT12 sensor driver

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This commit is contained in:
Theo Arends 2019-12-21 12:43:07 +01:00
parent 42f25b1cfb
commit e85f1560a2
1 changed files with 74 additions and 62 deletions
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136
tasmota/xsns_58_dht12.ino
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@ -28,82 +28,94 @@
#define XSNS_58 58 #define XSNS_58 58
#define XI2C_41 41 // See I2CDEVICES.md #define XI2C_41 41 // See I2CDEVICES.md
#define DHT12_ADDR (uint8_t) 0x5C #define DHT12_ADDR 0x5C
char dht12_name[] = "DHT12-0x00"; struct DHT12 {
uint8_t dht12_count = 0; float temperature = NAN;
float dht12_temperature = NAN; float humidity = NAN;
float dht12_humidity = NAN; uint8_t valid = 0;
uint8_t count = 0;
char name[6] = "DHT12";
} Dht12;
bool Dht12Read(void) bool Dht12Read(void)
{ {
Wire.beginTransmission(DHT12_ADDR); if (Dht12.valid) { Dht12.valid--; }
Wire.write(0);
if (Wire.endTransmission() != 0) { Wire.beginTransmission(DHT12_ADDR);
return false; Wire.write(0);
} if (Wire.endTransmission() != 0) { return false; }
delay(50);
Wire.requestFrom(DHT12_ADDR, (uint8_t) 5); delay(50);
delay(5);
uint8_t humidity = Wire.read(); Wire.requestFrom(DHT12_ADDR, 5);
uint8_t humidityTenth = Wire.read(); delay(5);
uint8_t temp = Wire.read(); uint8_t humidity = Wire.read();
uint8_t tempTenth = Wire.read(); uint8_t humidityTenth = Wire.read();
uint8_t checksum = Wire.read(); uint8_t temp = Wire.read();
dht12_humidity = (float) humidity + (float) humidityTenth/(float) 10.0; uint8_t tempTenth = Wire.read();
dht12_temperature = (float) temp + (float) tempTenth/(float) 10.0; uint8_t checksum = Wire.read();
return (!isnan(dht12_temperature) && !isnan(dht12_humidity));
Dht12.humidity = ConvertHumidity( (float) humidity + (float) humidityTenth/(float) 10.0 );
Dht12.temperature = ConvertTemp( (float) temp + (float) tempTenth/(float) 10.0 );
if (isnan(Dht12.temperature) || isnan(Dht12.humidity)) { return false; }
Dht12.valid = SENSOR_MAX_MISS;
return true;
} }
/********************************************************************************************/
void Dht12Detect(void) void Dht12Detect(void)
{ {
if (Dht12Read()) { if (I2cActive(DHT12_ADDR)) { return; }
snprintf_P(log_data, sizeof(log_data), S_LOG_I2C_FOUND_AT, dht12_name, DHT12_ADDR);
AddLog(LOG_LEVEL_DEBUG); if (Dht12Read()) {
snprintf_P(dht12_name, sizeof(dht12_name), PSTR("%s%c0x%02X"), "DHT12", IndexSeparator(), DHT12_ADDR); I2cSetActiveFound(DHT12_ADDR, Dht12.name);
dht12_count = 1; Dht12.count = 1;
} }
} }
void Dht12Show(bool json) void Dht12EverySecond(void)
{ {
if (dht12_count > 0) if (uptime &1) {
{ // DHT12: 55mS
char temperature[33]; if (!Dht12Read()) {
dtostrfd(dht12_temperature, Settings.flag2.temperature_resolution, temperature); AddLogMissed(Dht12.name, Dht12.valid);
char humidity[33];
dtostrfd(dht12_humidity, Settings.flag2.humidity_resolution, humidity);
if (json)
{
ResponseAppend_P(JSON_SNS_TEMPHUM, dht12_name, temperature, humidity);
#ifdef USE_DOMOTICZ
if ((0 == tele_period))
{
DomoticzTempHumSensor(temperature, humidity);
}
#endif // USE_DOMOTICZ
#ifdef USE_KNX
if (0 == tele_period)
{
KnxSensor(KNX_TEMPERATURE, dht12_temperature);
KnxSensor(KNX_HUMIDITY, dht12_humidity);
}
#endif // USE_KNX
#ifdef USE_WEBSERVER
}
else
{
WSContentSend_PD(HTTP_SNS_TEMP, dht12_name, temperature, TempUnit());
WSContentSend_PD(HTTP_SNS_HUM, dht12_name, humidity);
#endif // USE_WEBSERVER
} }
} }
} }
void Dht12Show(bool json)
{
if (Dht12.valid) {
char temperature[33];
dtostrfd(Dht12.temperature, Settings.flag2.temperature_resolution, temperature);
char humidity[33];
dtostrfd(Dht12.humidity, Settings.flag2.humidity_resolution, humidity);
if (json) {
ResponseAppend_P(JSON_SNS_TEMPHUM, Dht12.name, temperature, humidity);
#ifdef USE_DOMOTICZ
if ((0 == tele_period)) {
DomoticzTempHumSensor(temperature, humidity);
}
#endif // USE_DOMOTICZ
#ifdef USE_KNX
if (0 == tele_period) {
KnxSensor(KNX_TEMPERATURE, Dht12.temperature);
KnxSensor(KNX_HUMIDITY, Dht12.humidity);
}
#endif // USE_KNX
#ifdef USE_WEBSERVER
} else {
WSContentSend_PD(HTTP_SNS_TEMP, Dht12.name, temperature, TempUnit());
WSContentSend_PD(HTTP_SNS_HUM, Dht12.name, humidity);
#endif // USE_WEBSERVER
}
}
}
/*********************************************************************************************\ /*********************************************************************************************\
* Interface * Interface
@ -118,10 +130,10 @@ bool Xsns58(uint8_t function)
if (FUNC_INIT == function) { if (FUNC_INIT == function) {
Dht12Detect(); Dht12Detect();
} }
else if (dht12_count > 0) { else if (Dht12.count) {
switch (function) { switch (function) {
case FUNC_EVERY_SECOND: case FUNC_EVERY_SECOND:
Dht12Read(); Dht12EverySecond();
break; break;
case FUNC_JSON_APPEND: case FUNC_JSON_APPEND:
Dht12Show(1); Dht12Show(1);