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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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92
tasmota/xsns_58_dht12.ino
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@ -28,83 +28,95 @@
#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)
{ {
if (Dht12.valid) { Dht12.valid--; }
Wire.beginTransmission(DHT12_ADDR); Wire.beginTransmission(DHT12_ADDR);
Wire.write(0); Wire.write(0);
if (Wire.endTransmission() != 0) { if (Wire.endTransmission() != 0) { return false; }
return false;
}
delay(50); delay(50);
Wire.requestFrom(DHT12_ADDR, (uint8_t) 5);
Wire.requestFrom(DHT12_ADDR, 5);
delay(5); delay(5);
uint8_t humidity = Wire.read(); uint8_t humidity = Wire.read();
uint8_t humidityTenth = Wire.read(); uint8_t humidityTenth = Wire.read();
uint8_t temp = Wire.read(); uint8_t temp = Wire.read();
uint8_t tempTenth = Wire.read(); uint8_t tempTenth = Wire.read();
uint8_t checksum = Wire.read(); uint8_t checksum = Wire.read();
dht12_humidity = (float) humidity + (float) humidityTenth/(float) 10.0;
dht12_temperature = (float) temp + (float) tempTenth/(float) 10.0; Dht12.humidity = ConvertHumidity( (float) humidity + (float) humidityTenth/(float) 10.0 );
return (!isnan(dht12_temperature) && !isnan(dht12_humidity)); 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 (I2cActive(DHT12_ADDR)) { return; }
if (Dht12Read()) { if (Dht12Read()) {
snprintf_P(log_data, sizeof(log_data), S_LOG_I2C_FOUND_AT, dht12_name, DHT12_ADDR); I2cSetActiveFound(DHT12_ADDR, Dht12.name);
AddLog(LOG_LEVEL_DEBUG); Dht12.count = 1;
snprintf_P(dht12_name, sizeof(dht12_name), PSTR("%s%c0x%02X"), "DHT12", IndexSeparator(), DHT12_ADDR); }
dht12_count = 1; }
void Dht12EverySecond(void)
{
if (uptime &1) {
// DHT12: 55mS
if (!Dht12Read()) {
AddLogMissed(Dht12.name, Dht12.valid);
}
} }
} }
void Dht12Show(bool json) void Dht12Show(bool json)
{ {
if (dht12_count > 0) if (Dht12.valid) {
{
char temperature[33]; char temperature[33];
dtostrfd(dht12_temperature, Settings.flag2.temperature_resolution, temperature); dtostrfd(Dht12.temperature, Settings.flag2.temperature_resolution, temperature);
char humidity[33]; char humidity[33];
dtostrfd(dht12_humidity, Settings.flag2.humidity_resolution, humidity); dtostrfd(Dht12.humidity, Settings.flag2.humidity_resolution, humidity);
if (json) if (json) {
{ ResponseAppend_P(JSON_SNS_TEMPHUM, Dht12.name, temperature, humidity);
ResponseAppend_P(JSON_SNS_TEMPHUM, dht12_name, temperature, humidity);
#ifdef USE_DOMOTICZ #ifdef USE_DOMOTICZ
if ((0 == tele_period)) if ((0 == tele_period)) {
{
DomoticzTempHumSensor(temperature, humidity); DomoticzTempHumSensor(temperature, humidity);
} }
#endif // USE_DOMOTICZ #endif // USE_DOMOTICZ
#ifdef USE_KNX #ifdef USE_KNX
if (0 == tele_period) if (0 == tele_period) {
{ KnxSensor(KNX_TEMPERATURE, Dht12.temperature);
KnxSensor(KNX_TEMPERATURE, dht12_temperature); KnxSensor(KNX_HUMIDITY, Dht12.humidity);
KnxSensor(KNX_HUMIDITY, dht12_humidity);
} }
#endif // USE_KNX #endif // USE_KNX
#ifdef USE_WEBSERVER #ifdef USE_WEBSERVER
} } else {
else WSContentSend_PD(HTTP_SNS_TEMP, Dht12.name, temperature, TempUnit());
{ WSContentSend_PD(HTTP_SNS_HUM, Dht12.name, humidity);
WSContentSend_PD(HTTP_SNS_TEMP, dht12_name, temperature, TempUnit());
WSContentSend_PD(HTTP_SNS_HUM, dht12_name, humidity);
#endif // USE_WEBSERVER #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);