commit 1f5b8f6c8c78a1f3246f6d6e7e25b387b0bf4151 Author: Stefan Ostermann Date: Sun Apr 4 15:01:32 2021 +0200 first commit diff --git a/receiver-arduino/receiver-arduino.ino b/receiver-arduino/receiver-arduino.ino new file mode 100644 index 0000000..4adfe63 --- /dev/null +++ b/receiver-arduino/receiver-arduino.ino @@ -0,0 +1,68 @@ +#define SERVER_ADDRESS 0x01 +#define RH_SPEED 2000 +#define RH_RX_PIN 11 + +#define RH_BUF_LEN 5 +uint8_t rh_buf[RH_BUF_LEN]; + +#define RH_ASK_MAX_MESSAGE_LEN RH_BUF_LEN + +#include +#include + +RH_ASK driver(RH_SPEED, RH_RX_PIN); + +float t = 0; +float h = 0; +uint8_t bat_percent = 0; +uint8_t bat_raw = 0; + +#define MSG_START 0x00 +#define MSG_TEMP 0x01 +#define MSG_HUMID 0x02 +#define MSG_ERR 0xee + +void setup() { + Serial.begin(9600); + if (!driver.init()) { + Serial.println("init failed"); + } else { + Serial.println("init done"); + } +} + +void loop() { + + uint8_t len = sizeof(rh_buf); + if (driver.recv(rh_buf, &len)) { + Serial.println("got message: "); + switch (rh_buf[0]) { + case MSG_START: + // start message + Serial.println("0x00 start byte"); + break; + case MSG_TEMP: + // DHT data + Serial.println("0x01 DHT data"); + memcpy(&t, &rh_buf[1], 4); + Serial.print(t); + Serial.print("°C - "); + break; + case MSG_HUMID: + // battery data + Serial.println("0x02 DHT Humidity"); + memcpy(&t, &rh_buf[1], 4); + Serial.print(t); + Serial.print("%"); + break; + case MSG_ERR: + // error + Serial.println("0xEE error"); + break; + default: + // should never happen + break; + } + } + +} diff --git a/sensor433-arduino/dht22.cpp b/sensor433-arduino/dht22.cpp new file mode 100644 index 0000000..db16b3a --- /dev/null +++ b/sensor433-arduino/dht22.cpp @@ -0,0 +1,149 @@ +/* Fast DHT Lirary + * + * Copyright (C) 2015 Sergey Denisov. + * Written by Sergey Denisov aka LittleBuster (DenisovS21@gmail.com) + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public Licence + * as published by the Free Software Foundation; either version 3 + * of the Licence, or (at your option) any later version. + * + * Original library written by Adafruit Industries. MIT license. + * + * https://github.com/LittleBuster/avr-dht22 + */ + +#include "dht22.h" +#include +#include +#include + + +#define DHT_COUNT 6 +#define DHT_MAXTIMINGS 85 + + +void dht_init(struct dht22 *dht, uint8_t pin) +{ + dht->pin = pin; + /* Setup the pins! */ + DDR_DHT &= ~(1 << dht->pin); + PORT_DHT |= (1 << dht->pin); +} + +static uint8_t dht_read(struct dht22 *dht) +{ + uint8_t tmp; + uint8_t sum = 0; + uint8_t j = 0, i; + uint8_t last_state = 1; + uint16_t counter = 0; + /* + * Pull the pin 1 and wait 250 milliseconds + */ + PORT_DHT |= (1 << dht->pin); + _delay_ms(250); + + dht->data[0] = dht->data[1] = dht->data[2] = dht->data[3] = dht->data[4] = 0; + + /* Now pull it low for ~20 milliseconds */ + DDR_DHT |= (1 << dht->pin); + PORT_DHT &= ~(1 << dht->pin); + _delay_ms(20); + cli(); + PORT_DHT |= (1 << dht->pin); + _delay_us(40); + DDR_DHT &= ~(1 << dht->pin); + + /* Read the timings */ + for (i = 0; i < DHT_MAXTIMINGS; i++) { + counter = 0; + while (1) { + tmp = ((PIN_DHT & (1 << dht->pin)) >> 1); + _delay_us(3); + + if (tmp != last_state) + break; + + counter++; + _delay_us(1); + + if (counter == 255) + break; + } + + last_state = ((PIN_DHT & (1 << dht->pin)) >> 1); + + if (counter == 255) + break; + + /* Ignore first 3 transitions */ + if ((i >= 4) && (i % 2 == 0)) { + /* Shove each bit into the storage bytes */ + dht->data[j/8] <<= 1; + if (counter > DHT_COUNT) + dht->data[j/8] |= 1; + j++; + } + } + + sei(); + sum = dht->data[0] + dht->data[1] + dht->data[2] + dht->data[3]; + + if ((j >= 40) && (dht->data[4] == (sum & 0xFF))) + return 1; + return 0; +} + +uint8_t dht_read_temp(struct dht22 *dht, float *temp) +{ + if (dht_read(dht)) { + *temp = dht->data[2] & 0x7F; + *temp *= 256; + *temp += dht->data[3]; + *temp /= 10; + + if (dht->data[2] & 0x80) + *temp *= -1; + return 1; + } + return 0; +} + +uint8_t dht_read_hum(struct dht22 *dht, float *hum) +{ + if (dht_read(dht)) { + *hum = dht->data[0]; + *hum *= 256; + *hum += dht->data[1]; + *hum /= 10; + if (*hum == 0.0f) + return 0; + return 1; + } + return 0; +} + +uint8_t dht_read_data(struct dht22 *dht, float *temp, float *hum) +{ + if (dht_read(dht)) { + /* Reading temperature */ + *temp = dht->data[2] & 0x7F; + *temp *= 256; + *temp += dht->data[3]; + *temp /= 10; + + if (dht->data[2] & 0x80) + *temp *= -1; + + /* Reading humidity */ + *hum = dht->data[0]; + *hum *= 256; + *hum += dht->data[1]; + *hum /= 10; + if (*hum == 0.0f) + return 0; + return 1; + } + return 0; +} diff --git a/sensor433-arduino/dht22.h b/sensor433-arduino/dht22.h new file mode 100644 index 0000000..50d7fef --- /dev/null +++ b/sensor433-arduino/dht22.h @@ -0,0 +1,76 @@ +/* struct dht22 AVR Lirary + * + * Copyright (C) 2015 Sergey Denisov. + * Written by Sergey Denisov aka LittleBuster (DenisovS21@gmail.com) + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public Licence + * as published by the Free Software Foundation; either version 3 + * of the Licence, or (at your option) any later version. + * + * Original library written by Adafruit Industries. MIT license. + * + * https://github.com/LittleBuster/avr-dht22 + */ + +#ifndef __DHT22_H__ +#define __DHT22_H__ + +#include + +/* + * Sensor's port + */ +#define DDR_DHT DDRB +#define PORT_DHT PORTB +#define PIN_DHT PINB + + +struct dht22 { + uint8_t data[6]; /* data from sensor store here */ + uint8_t pin; /* DDR & PORT pin */ +}; + +/** + * Init dht sensor + * @dht: sensor struct + * @pin: PORT & DDR pin + */ +void dht_init(struct dht22 *dht, uint8_t pin); + +/** + * Reading temperature from sensor + * @dht: sensor struct + * @temp: out temperature pointer + * + * Returns 1 if succeful reading + * Returns 0 if fail reading + */ +uint8_t dht_read_temp(struct dht22 *dht, float *temp); + +/** + * Reading humidity from sensor + * @dht: sensor struct + * @hum: out humidity pointer + * + * Returns 1 if succeful reading + * Returns 0 if fail reading + */ +uint8_t dht_read_hum(struct dht22 *dht, float *hum); + +/** + * Reading temperature and humidity from sensor + * @dht: sensor struct + * @temp: out temperature pointer + * @hum: out humidity pointer + * + * Returns 1 if succeful reading + * Returns 0 if fail reading + * + * The fastest function for getting temperature + humidity. + */ +uint8_t dht_read_data(struct dht22 *dht, float *temp, float *hum); + + +#endif + diff --git a/sensor433-arduino/sensor433-arduino.ino b/sensor433-arduino/sensor433-arduino.ino new file mode 100644 index 0000000..2e57cff --- /dev/null +++ b/sensor433-arduino/sensor433-arduino.ino @@ -0,0 +1,243 @@ +/* + RadioHead DHT22 Weather Station + + Copyright (c) 2017 Peter Müller (https://crycode.de) + Source: https://git.cryhost.de/crycode/attiny85-radiohead-dht22-weather-sensor/-/tree/master +*/ + +/************** + config + **************/ + +/// RH_ASK works with ATTiny85, using Arduino 1.0.5 and tinycore from +/// https://code.google.com/p/arduino-tiny/downloads/detail?name=arduino-tiny-0100-0018.zip +/// Tested with the examples ask_transmitter and ask_receiver on ATTiny85. +/// Caution: The RAM memory requirements on an ATTiny85 are *very* tight. Even the bare bones +/// ask_transmitter sketch barely fits in eh RAM available on the ATTiny85. Its unlikely to work on +/// smaller ATTinys such as the ATTiny45 etc. If you have wierd behaviour, consider +/// reducing the size of RH_ASK_MAX_PAYLOAD_LEN to the minimum you can work with. +/// Caution: the default internal clock speed on an ATTiny85 is 1MHz. You MUST set the internal clock speed +/// to 8MHz. You can do this with Arduino IDE, tineycore and ArduinoISP by setting the board type to "ATtiny85@8MHz', +/// setting theProgrammer to 'Arduino as ISP' and selecting Tools->Burn Bootloader. This does not actually burn a +/// bootloader into the tiny, it just changes the fuses so the chip runs at 8MHz. +/// If you run the chip at 1MHz, you will get RK_ASK speeds 1/8th of the expected. +/// +/// Initialise RH_ASK for ATTiny85 like this: +/// // #include // comment this out, not needed +/// RH_ASK driver(2000, 4, 3); // 200bps, TX on D3 (pin 2), RX on D4 (pin 3) +/// then: +/// Connect D3 (pin 2) as the output to the transmitter +/// Connect D4 (pin 3) as the input from the receiver. +/// +/// +/// For testing purposes you can connect 2 Arduino RH_ASK instances directly, by +/// connecting pin 12 of one to 11 of the other and vice versa, like this for a duplex connection: +/// +/// \code +/// Arduino 1 wires Arduino 1 +/// D11-----------------------------D12 +/// D12-----------------------------D11 +/// GND-----------------------------GND +/// \endcode +/// +/// You can also connect 2 RH_ASK instances over a suitable analog +/// transmitter/receiver, such as the audio channel of an A/V transmitter/receiver. You may need +/// buffers at each end of the connection to convert the 0-5V digital output to a suitable analog voltage. +/// +/// Measured power output from RFM85 at 5V was 18dBm. + +// pin with the LED connected +#define LED_PIN 4 + +// blink time for the LED +#define LED_TIME 200 + +// pin of the DHT22 sensor +#define DHT_PIN 1 + +// the own RadioHead address +#define RH_OWN_ADDR 0xca // 202 + +// the server RadioHead address +#define RH_SERVER_ADDR 0x01 + +// RadioHead bitrate in bit/s +#define RH_SPEED 2000 + +// pins for the radio hardware +#define RH_RX_PIN 5 // not used, set to a non-existent pin +#define RH_TX_PIN 3 +#define RH_PTT_PIN 5 // not used, set to a non-existent pin + + +/************** + end config + **************/ + +#include +#include +#include +#include + +// for watchdog wakeup +// https://gist.github.com/dwhacks/8055287 +#ifndef cbi +#define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit)) +#endif +#ifndef sbi +#define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit)) +#endif + + +// DHT22 lib +// not using the current adafruit dht library, because it eats too many memory +#include "dht22.h" +dht22 dht; + +#define RH_BUF_LEN 5 +uint8_t rh_buf[RH_BUF_LEN] = { 0x00, 0x00, 0x00, 0x00, 0x00 }; + +// reduce the RadioHead max message length to save memory +#define RH_ASK_MAX_MESSAGE_LEN RH_BUF_LEN + +// RadioHead +#include + +#define MSG_START 0x00 +#define MSG_TEMP 0x01 +#define MSG_HUMID 0x02 +#define MSG_ERR 0xee + + +RH_ASK rh_driver(RH_SPEED, RH_RX_PIN, RH_TX_PIN, RH_PTT_PIN); + +// watchdog flag +volatile boolean f_wdt = 1; + +// temp / humid toggle +volatile boolean toggle = 0; + + +void gotoSleep(void); + +void setup() { + // setup the LED pin + pinMode(LED_PIN, OUTPUT); + + // init the DHT22 + dht_init(&dht, DHT_PIN); + + + uint8_t num_blink = 3; + + if (!rh_driver.init()) { + num_blink = 5; + } + + // blink 3 times + for (uint8_t i = 0; i < num_blink; i++) { + digitalWrite(LED_PIN, HIGH); + _delay_ms(LED_TIME); + digitalWrite(LED_PIN, LOW); + _delay_ms(LED_TIME); + } + + // send start message + rh_buf[0] = MSG_START; + rh_send(1); + + setup_watchdog(6); // approximately 4 seconds sleep + +} + +// main loop +void loop() { + + if (f_wdt) { + f_wdt = 0; + // turn on the LED + digitalWrite(LED_PIN, HIGH); + + // temperature and humidity + float t = 0;//float is 32bit = 1byte + float h = 0; + + // read from the sensor and check if it was successfull + if (dht_read_data(&dht, &t, &h) == 1) { + // normal message + + if (toggle) { + rh_buf[0] = MSG_TEMP; + memcpy(&rh_buf[1], &t, 4); + } else { + rh_buf[0] = MSG_HUMID; + memcpy(&rh_buf[1],&h,4); + } + toggle = !toggle; + + rh_send(RH_BUF_LEN); + + } else { + // error message + rh_buf[0] = MSG_ERR; + rh_send(1); + + } + + // turn off the LED + digitalWrite(LED_PIN, LOW); + system_sleep(); + //_delay_ms(1000); + } + +} + + +// function to send RadioHead messages from the buffer +void rh_send(uint8_t len) { + rh_driver.send((uint8_t *)rh_buf, len); + rh_driver.waitPacketSent(); +} + + + +ISR(WDT_vect) +{ + f_wdt = 1; // set global flag +} + +/* set system into the sleep state + system wakes up when watchdog is timed out +*/ +void system_sleep() { + cbi(ADCSRA, ADEN); // switch Analog to Digitalconverter OFF + + set_sleep_mode(SLEEP_MODE_PWR_DOWN); // sleep mode is set here + sleep_enable(); + + sleep_mode(); // System sleeps here + + sleep_disable(); // System continues execution here when watchdog timed out + sbi(ADCSRA, ADEN); // switch Analog to Digitalconverter ON +} + +/* 0=16ms, 1=32ms,2=64ms,3=128ms,4=250ms,5=500ms + 6=1 sec,7=2 sec, 8=4 sec, 9= 8sec +*/ +void setup_watchdog(int ii) { + + byte bb; + int ww; + if (ii > 9 ) ii = 9; + bb = ii & 7; + if (ii > 7) bb |= (1 << 5); + bb |= (1 << WDCE); + ww = bb; + + MCUSR &= ~(1 << WDRF); + // start timed sequence + WDTCR |= (1 << WDCE) | (1 << WDE); + // set new watchdog timeout value + WDTCR = bb; + WDTCR |= _BV(WDIE); +}