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262 changes: 262 additions & 0 deletions
262
examples/dhtnew_pulse_diag_ext/dhtnew_pulse_diag_ext.ino
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| Original file line number | Diff line number | Diff line change |
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| // | ||
| // FILE: dhtnew_pulse_diag_ext.ino | ||
| // AUTHOR: Rob Tillaart | ||
| // PURPOSE: DHTNEW library pulse measurement tool - diagnostics | ||
| // URL: https://github.com/RobTillaart/DHTNew | ||
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| // DHT PIN layout from left to right | ||
| // ================================= | ||
| // FRONT : DESCRIPTION | ||
| // pin 1 : VCC | ||
| // pin 2 : DATA | ||
| // pin 3 : Not Connected | ||
| // pin 4 : GND | ||
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| #include "Arduino.h" | ||
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| #define DHTLIB_DHT11_WAKEUP 18 | ||
| #define DHTLIB_DHT_WAKEUP 1 | ||
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| #define BIT_THRESHOLD 50 | ||
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| uint8_t _dataPin = 5; | ||
| uint8_t _wakeupDelay = DHTLIB_DHT_WAKEUP; | ||
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| uint16_t count = 0; | ||
| uint32_t times[100], t = 0; | ||
| uint8_t idx = 0; | ||
| uint32_t value; | ||
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| void setup() | ||
| { | ||
| while (!Serial); // MKR1010 needs this | ||
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| Serial.begin(115200); | ||
| Serial.println("dhtnew_pulse_diag_ext.ino"); | ||
| Serial.println(); | ||
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| // default should be HIGH | ||
| pinMode(_dataPin, OUTPUT); | ||
| digitalWrite(_dataPin, HIGH); | ||
| } | ||
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| void loop() | ||
| { | ||
| measure(); | ||
| dump(); | ||
| delay(5000); | ||
| } | ||
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| void dump() | ||
| { | ||
| int i = 1; | ||
| Serial.println(); | ||
| Serial.print("RUN:\t"); Serial.println(count); | ||
| Serial.print("IDX:\t"); Serial.println(idx); | ||
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| Serial.println("WAKEUP"); | ||
| for (int n = 0; n < 6; n++) | ||
| { | ||
| Serial.print("\t"); | ||
| Serial.print(times[i++]); | ||
| } | ||
| Serial.println(); | ||
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| Serial.println("HUM"); | ||
| uint16_t raw_humidity = 0; | ||
| for (int n = 0; n < 32; n++) | ||
| { | ||
| Serial.print("\t"); | ||
| if (n % 2) | ||
| { | ||
| raw_humidity <<= 1; | ||
| if (times[i] > BIT_THRESHOLD) raw_humidity |= 1; | ||
| } | ||
| Serial.print(times[i++]); | ||
| if ((n & 15) == 15) Serial.println(); | ||
| } | ||
| Serial.print("RAW H:\t0b"); | ||
| Serial.print(raw_humidity, BIN); | ||
| Serial.print(" = 0x"); | ||
| Serial.print(raw_humidity, HEX); | ||
| Serial.print(" = "); | ||
| Serial.print(raw_humidity, DEC); | ||
| Serial.print(" = "); | ||
| Serial.print(raw_humidity * 0.1, 1); | ||
| Serial.print("%"); | ||
| Serial.println(); | ||
| Serial.println(); | ||
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| Serial.println("TEMP"); | ||
| uint16_t raw_temperature = 0; | ||
| for (int n = 0; n < 32; n++) | ||
| { | ||
| Serial.print("\t"); | ||
| if (n % 2) | ||
| { | ||
| raw_temperature <<= 1; | ||
| if (times[i] > BIT_THRESHOLD) raw_temperature |= 1; | ||
| } | ||
| Serial.print(times[i++]); | ||
| if ((n & 15) == 15) Serial.println(); | ||
| } | ||
| Serial.print("RAW T:\t0b"); | ||
| Serial.print(raw_temperature, BIN); | ||
| Serial.print(" = 0x"); | ||
| Serial.print(raw_temperature, HEX); | ||
| Serial.print(" = "); | ||
| Serial.print(raw_temperature, DEC); | ||
| Serial.print(" = "); | ||
| Serial.print(raw_temperature * 0.1, 1); | ||
| Serial.print("C"); | ||
| Serial.println(); | ||
| Serial.println(); | ||
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| Serial.println("CRC"); | ||
| uint8_t raw_CRC = 0; | ||
| for (int n = 0; n < 16; n++) | ||
| { | ||
| Serial.print("\t"); | ||
| if (n % 2) | ||
| { | ||
| raw_CRC <<= 1; | ||
| if (times[i] > BIT_THRESHOLD) raw_CRC |= 1; | ||
| } | ||
| Serial.print(times[i++]); | ||
| if ((n & 7) == 7) Serial.println(); | ||
| } | ||
| Serial.print("CRC:\t0b"); | ||
| Serial.print(raw_CRC, BIN); | ||
| Serial.print(" = "); | ||
| Serial.print(raw_CRC, DEC); | ||
| Serial.print(" <=> "); | ||
| uint8_t calc_crc = 0; | ||
| calc_crc += (raw_humidity >> 8) + (raw_humidity & 0xFF); | ||
| calc_crc += (raw_temperature >> 8) + (raw_temperature & 0xFF); | ||
| Serial.print(calc_crc, DEC); | ||
| Serial.println(); | ||
| Serial.println(); | ||
| Serial.println(); | ||
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| Serial.println("BYE"); | ||
| for (int n = 0; n < 2; n++) | ||
| { | ||
| Serial.print("\t"); | ||
| Serial.print(times[i++]); | ||
| } | ||
| Serial.println(); | ||
| Serial.println(); | ||
| } | ||
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| void measure() | ||
| { | ||
| Serial.print(F("\n===================================\n")); | ||
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| count++; | ||
| // yield(); // handle pending interrupts | ||
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| // reset measurements table | ||
| idx = 0; | ||
| t = micros(); | ||
| for (int i = 0; i < 100; i++) times[i] = 0; | ||
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| times[idx++] = micros(); | ||
| // REQUEST SAMPLE - SEND WAKEUP TO SENSOR | ||
| pinMode(_dataPin, OUTPUT); | ||
| digitalWrite(_dataPin, LOW); | ||
| // add 10% extra for timing inaccuracies in sensor. | ||
| delayMicroseconds(_wakeupDelay * 1100UL); | ||
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| Serial.print("awake "); | ||
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| times[idx++] = micros(); | ||
| // HOST GIVES CONTROL TO SENSOR | ||
| pinMode(_dataPin, INPUT_PULLUP); | ||
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| // DISABLE INTERRUPTS when clock in the bits | ||
| // noInterrupts(); // gives problems on AVR | ||
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| times[idx++] = micros(); | ||
| // SENSOR PULLS LOW after 20-40 us => if stays HIGH ==> device not ready | ||
| while (digitalRead(_dataPin) == HIGH); | ||
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| Serial.print("2 "); | ||
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| times[idx++] = micros(); | ||
| // SENSOR STAYS LOW for ~80 us => or TIMEOUT | ||
| while (digitalRead(_dataPin) == LOW); | ||
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| Serial.print("3 "); | ||
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| times[idx++] = micros(); | ||
| // SENSOR STAYS HIGH for ~80 us => or TIMEOUT | ||
| while (digitalRead(_dataPin) == HIGH); | ||
| times[idx++] = micros(); | ||
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| Serial.print("4 "); | ||
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| // SENSOR HAS NOW SEND ACKNOWLEDGE ON WAKEUP | ||
| // NOW IT SENDS THE BITS | ||
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| // READ THE OUTPUT - 40 BITS => 5 BYTES | ||
| uint32_t start = micros(); | ||
| uint8_t i = 40; | ||
| for (i = 40; i != 0; i--) | ||
| { | ||
| times[idx++] = micros(); | ||
| // EACH BIT START WITH ~50 us LOW | ||
| while (digitalRead(_dataPin) == LOW) | ||
| { | ||
| if (micros() - start > 10000) | ||
| { | ||
| Serial.print(" <"); | ||
| Serial.println(i); | ||
| Serial.println("> "); | ||
| break; | ||
| } | ||
| } | ||
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| times[idx++] = micros(); | ||
| // DURATION OF HIGH DETERMINES 0 or 1 | ||
| // 26-28 us ==> 0 | ||
| // 70 us ==> 1 | ||
| while (digitalRead(_dataPin) == HIGH) | ||
| { | ||
| if (micros() - start > 10000) | ||
| { | ||
| Serial.println(i); | ||
| break; | ||
| } | ||
| } | ||
| } | ||
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| Serial.print("5 "); | ||
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| times[idx++] = micros(); | ||
| // After 40 bits the sensor pulls the line LOW for 50 us | ||
| // TODO: should we wait? | ||
| while (digitalRead(_dataPin) == LOW); | ||
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| Serial.print("6 "); | ||
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| times[idx++] = micros(); | ||
| times[idx++] = micros(); | ||
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| for (int n = 100; n > 0; n--) | ||
| { | ||
| times[n] -= times[n - 1]; | ||
| } | ||
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| Serial.println("7 "); | ||
| } | ||
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| // -- END OF FILE -- |
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